TECHNOLOGICAL INSTITUTE OF THE PHILIPPINES QUEZON CITY Final Design Output for the Course EE 502 – ILLUMINATION ENGINEERING DESIGN PROPOSED DESIGN OF ILLUMINATION SYSTEMS OF PASIG CITY SCIENCE HIGH SCHOOL AT F. LEGASPI ST. RAINFOREST PARK, MAYBUNGA, PASIG CITY Submitted By: Maverick B. Sale Khristian Kyle M. Tagle Mark Anthony T. Visperas Submitted To: ENGR. CHRISTIAN VER A. SENSANO Electrical Engineering Instructor College of Engineering and Architecture ENGR. FERDINAND D. MILAN Electrical Engineering Program Chairperson College of Engineering and Architecture FIRST SEMESTER ACADEMIC YEAR 2018 – 2019 A P P RO V A L S H E E T The design project PROPOSED DESIGN OF ILLUMINATION SYSTEMS OF PASIG CITY SCIENCE HIGH SCHOOL AT F. LEGASPI ST. RAINFOREST PARK, MAYBUNGA, PASIG CITY prepared by the student designers, Maverick B. Sale, Khristian Kyle M. Tagle, and Mark Anthony T. Visperas of the EE51FC1 of Electrical Engineering Program, of the First Semester of A.Y. 2018 – 2019 was submitted to and evaluated by the Course Instructor and hereby recommended for approval. Recommending Approval: ENGR. CHRISTIAN VER A. SENSANO Course Instructor Accepted in COMPLETION of the course EE 502 – Illumination Engineering Design. ENGR. FERDINAND D. MILAN Program Chairperson 1 TABLE OF CONTENTS I. Chapter I………………………………………………………………..………4 1.1 Background of the Project………………………………………….….4 1.2 Statement of the Problem……………………………………………...5 1.3 Objectives of the Project……………………………………………….6 1.4 Scopes and Limitations of the Project………………………………..6 II. Chapter II……………………………………………………………………....7 2.1 Related Study……………………………………………………………7 2.2 Paradigm of the Study………………………………………………….8 III. Chapter III…………………………………………………………………….11 3.1 Illumination Testing of Existing Systems………………………….11 3.2 Design Strategies………………………………………………………26 3.3 Design Codes and Standards………………………………………...33 3.4 Design Trade-offs…………………………………………………...…34 IV. Chapter IV…………………………………………………………………….37 4.1 Design of Illumination Systems (Design 1)………………………..37 4.1.1 Lighting Fixtures Layout (Illumination Design Sheets) 4.1.2 Switching Layout (Illumination Design Sheets) 4.1.3 Lighting Panel Diagram (Illumination Design Sheets) 4.1.4 Lighting Fixture Schedule (Illumination Design Sheets) 4.1.5 Cost and Estimation…………………………………………...38 4.2 Design of Illumination Systems (Design 2)………………………..40 4.2.1 Lighting Fixtures Layout (Illumination Design Sheets) 4.2.2 Switching Layout (Illumination Design Sheets) 4.2.3 Lighting Panel Diagram (Illumination Design Sheets) 4.2.4 Lighting Fixture Schedule (Illumination Design Sheets) 4.2.5 Cost and Estimation…………………………………………...41 2 V. Chapter V…………………………………………………………………..…43 5.1 Analysis of Return of Investments……………………………….…43 5.1.1 Capital Costs…………………………….......………………….43 5.1.2 Energy Savings………………………...……………………….43 5.1.3 Maintenance and Operational Costs……….....…………….46 5.2 Approved Design for Retrofitting…………………………………..46 VI. Appendices…………………………………………………………………...48 A. Appendix A B. Appendix B C. Relevant sources VII. Curriculum Vitae 3 CHAPTER I INTRODUCTION 1.1. Background of the Project It is said that vision is the most abundant perception of humans that is used for information acquisition. This means that in order for humans to work effectively, they should be able to clearly discern and perceive visually the objects around them. Lighting plays an important role in everyday human life because of the importance of visual perception in human activities. Light, in technical term, connotes electromagnetic radiation which is effect provides visual sensation. According to Rensselaer Polytechnic Institute (2000), light is simply a very small part of the electromagnetic spectrum, sandwiched between ultraviolet and infrared radiation. The visible portion of the electromagnetic spectrum extends from 380 to about 780 nanometers. The Illumination Engineering Society of North America (IESNA) defines light as a radiant energy that is capable of exciting the retina and producing a visual sensation. Because of these, we define light not in terms of radiant energy nor of visual sensation rather by the combination of the two. According to Canadian Centre for Occupational Health and Safety (CCOHS), poor lighting at work or at any location concerning human activities can cause eye-strain, ineffective outputs, and even accidents. On the other hand, too much light can also lead to other safety and health issues like glares and headaches. According to Teichmuller, “we can say that the lighting is good when our eyes can clearly and pleasantly perceive the things around us”. Efforts in the fields of electrical engineering and illumination engineering are inserted on to reducing energy consumption of artificial lightings yet can still provide efficient illumination in order to enhance human productivity. School is one of the establishments that concerns a variety of human activities. These activities includes works inside the classes, laboratories, libraries, offices, cafeterias, and even gymnasiums. Every single one of this room of specific activities follows specific illuminance requirement according 4 to the design standards. Pasig City Science High School is a specialized public secondary school located at Rainforest Adventure Park, Maybunga, Pasig City which offers scholarship for students residing in Pasig City who are gifted in the field of science and technology. According to the official website of Pasig City Science High School, the school was founded on October 7, 2004 with the support and determination of Former City Mayor Soledad C. Eusebio, Hon. Mayor Vicente P. Eusebio, and the members of the City Council. The school formally opened in the school year 2005-2006 using temporarily the fifth, sixth and seventh floors of the Pamantasan ng Lungsod ng Pasig building. In summer of 2006, the school transferred to its new and permanent establishment –a six story building located at the Rainforest Park. The facilities include classrooms, offices, library, restrooms, speech laboratory, computer laboratory and four well-furnished science laboratories. The school added a new six story building on December 18, 2013, inaugurated by the incumbent mayor, Ms. Maribel Andaya Eusebio, and the City Council. It was first used by the 20142015 Grade 7 students. 1.2. Statement of the Problem In this design project, the team is to propose a lighting layout for the Pasig City Science High School building. In order to effectively design a lighting layout, the team would answer the following questions: Does the existing lighting layout of the classrooms follow the design standards or guidelines provided by the Department of Education? Does the existing lighting layout of the establishment follow the design standards set by the Illumination Engineering Society of North America? Are the students satisfied on the existing lighting layout? 5 1.3. Objectives of the Project The main objective of this project is to provide an improvement to the existing lighting layout for the building of Pasig City Science High School. The specific objectives of this project is: To analyze if the existing lighting layout follows the standards by measuring the illuminance of the Pasig City Science High School building. To inspect the location and specifications of the existing lighting fixtures. To provide an analysis of the return of investment for the improved lighting layout. 1.4. Scope and Limitations of the Project The team targets to provide an improvement to the existing lighting layout design, in accordance to design codes and standards, for the Pasig City Science High School building. The output design would be compromised only of lighting fixtures layout, switching layout, lighting panel diagram, and lighting fixture schedule. The deliverables would include cost and estimation together with the analysis of return of investments, which covers the capital cost, energy savings, maintenance costs, and operational costs. 6 CHAPTER II CONCEPTUAL FRAMEWORK 2.1. Related Studies Penny (2012) said that the constant evolution of lighting technology results in lower costs and better light quality for variety of lamp styles. Old, flickering fluorescent tubes and heat-shedding incandescent bulbs should be thing of the past, but in many schools, they’re an inefficient, underperforming part of the present. Note problems and spaces that require improvement and look for opportunities to create a visually comfortable environment as defined by the Illuminating Engineering Society of North America (IESNA): First is to provide views to the outside, which allow the eye muscles to relax as they focus on the distance. Second is control the window luminance to avoid glare. Third is ensure that the angle between any source of high luminance and principal sight lines is as large as possible. Fourth is to avoid high brightness contrast. Fifth is to place sources of high brightness against a bright background to reduce visual discomfort and finally, replace recessed parabolic or lens fixtures with pendant – mounted indirect or direct fixtures. You should balance the benefits of these improvements against your budget and determine which projects offer the most advantages with the smallest payback period. According to the researchers, the biologically-optimized light provides stimulation to the body as if the person was outdoors. This causes the students' circadian rhythms to shift forward (in time) so that they are alert earlier in the day. The researchers say this can counteract “social jetlag” i.e. tiredness in the mornings frequently observed in young people in particular. “In order to create an artificial sky in the classroom, we use strips with blue and white LEDs that can be controlled independently of each other,” said Hannah Helbig, Innovation Manager at Osram. “Therefore, the light colors can be mixed dynamically and reproduce the color temperature of the sky inside the building.” (Whitaker, 2012) 7 Leeming (2017) stated in an article that during puberty, teenager's sleep patterns often shift towards a later bedtime and a later awakening in the morning. This acts to reduce the mental performance of adolescents and young adults. Sleep is essential for optimal functioning in everyday life and adolescents often have delayed and irregular sleep patterns, with potentially negative effects on academic performance and daytime functioning. A shower of intensely cold white light increases short-term concentration and attention and improve student performance. Similarly, when students gather in front of the teacher to listen to a story, the lighting can be used to create a warm white light and a pleasant and relaxing atmosphere 2.2. Paradigm of the Study INPUT PROCESS Plans - Floor Plan - Existing Lighting Layout - Existing Lighting Fixtures Schedule Testing - Illumination Testing of Existing Lighting Layout Tools and Software - Lux Meter - AutoCAD Designing - Desining in AutoCAD - Software Calculations - Design Trade-offs Peopleware - Theories and Principles - Design Codes and Standards Cost and Estimation - Analysis of Return of Investments DELIVERABLES Improved Lighting Layout of the Pasig City Science High School Building - Lighting Fixture Layout - Switching Layout - Lighting Panel Diagram - Lighting Fixture Schedule Return of Investments - Capital Cost - Energy Savings - Maintenance and Operational Cost Figure 2.1 Diagram of the Paradigm of the Study Figure 2.1 shows the input, process, and deliverables of the improvement of the existing lighting layout of the Pasig City Science building. 8 2.2.1. Inputs A. Plans One of the initial steps in preparing illumination design is to secure the plans and other relevant documents regarding the design. In order to proceed in this design project, the team must first acquire the following plans from the client or architect. a. Floor Plan b. Existing Lighting Layout c. Existing Lighting Fixture Schedule B. Tools and Software Illuminance testing is to be accomplished in order to evaluate the necessary improvements on the existing lighting layout of the selected establishment. This would be carried out with the use of a lux meter. The team would use AutoCAD in designing an improved lighting layout for the chosen establishment. C. Peopleware The team should have the required theories and principles that should be taken into account before designing an effective lighting layout. The team should also follow certain design codes and standards for safety purposes. 2.2.2. Process A. Testing Illuminance testing on the area of the chosen establishment of is necessary in order to evaluate the existing lighting layout if it follows the given illuminance standards. B. Designing a. Designing in AutoCAD b. Software Calculation 9 c. Design Trade-offs C. Cost and Estimation The team should show the analysis of the estimated cost in order to analyze the most effective design before they can show the proposed designs to the client. 2.2.3. Deliverables A. Improved Lighting Layout of the Pasig City Science High School Building a. Lighting Fixture Layout b. Switching Layout c. Lighting Panel Diagram d. Lighting Fixture Schedule B. Return of Investments a. Capital Cost b. Energy Savings c. Maintenance and Operational Cost 10 CHAPTER III DESIGN METHODOLOGY 3.1. Illumination testing of existing systems In order to assess whether the existing lighting system of the Pasig City Science High School is following the standard set by the Department of Education (DepEd) and the Illuminating Engineering Society of North America (IESNA), the design team performed illumination testing in the vicinities of the chosen establishment. The team used a lux meter to measure the luminance level on various points in a certain a room. The required height of the working plane in a given type of room was also taken into consideration. The calculated average of the recorded luminance level of the various points in a room would be the overall lux level of the room under evaluation. Together with the illuminance testing, the team also conducted survey to evaluate if the existing lighting layout system is sufficient for the users, in this case are the students, and if they encounter any problems with the existing layout. 3.1.1. Illumination Testing Upon submitting the request letter to conduct illumination testing to the person-in-charge, the team conduct the initial illumination testing of existing systems using a lux meter, the team first identify the points to be measured before conducting the test per classification of room (e.g. classrooms, auditoriums, library, laboratories, cafeteria and kitchen). For every room classification, the team prepared different set points for testing. The height for the lux meter was based on the heights for the working plane in every room classification. Luminance level of the effective natural light within the room is also taken into account. The results of the illuminance testing is shown below. 11 A. Cafeteria Required Luminance (IESNA): 300 lux Room Area: 18.75 m x 7 m Height of working plane: 0.74 m Figure 3.1 Testing points in the Cafeteria Recorded data (from left to right) B. First row: 28 lux, 45 lux, 36 lux, and 16 lux Second row: 52 lux, 58 lux, 66 lux, and 62 lux Third row: 17 lux, 21 lux, 51 lux, and 10 lux Average: 77 lux (below standard) Kitchen Required Luminance (IESNA): 150 lux Room Area: 3.75 m x 7 m Height of working plane: 0.74 m Recorded data (top to bottom): 59 lux, 57 lux, and 57 lux Average: 57.7 lux (below standard) 12 Figure 3.2 Testing points in the kitchen C. Food Laboratory Required Luminance (IESNA): 300 lux Room Area: 7.5 m x 7 m Height of working plane: 0.8 m Recorded data (from left to right): First row: 351 lux, 241 lux, and 433 lux Second row: 343 lux, 314 lux, and 301 lux Average: 330.5 lux (within the standard) 13 Figure 3.3 Testing points in the Food Laboratory D. Faculty Office Required Luminance (IESNA): 300 lux Room Area: 2.75 m x 7 m Height of working plane: 0.73 m Figure 3.4 Testing points in the Faculty Office 14 Recorded data (top to bottom): 60 lux, 57 lux, and 43 lux Average: E. 53.33 lux (below standard) Library Office Required Luminance (IESNA): 300 lux Room Area: 3.75 m x 7 m Height of working plane: 0.72 m Figure 3.5 Testing points in the Library Office Recorded data: 84 lux, and 84 lux Average: F. 84 lux (below standard) Library Required Luminance (IESNA): 300 lux Room Area: 22.5 m x 7 m Height of working plane: 0.72 m 15 Figure 3.6 Testing points in the Library Recorded data (from left to right): G. First row: 104 lux, 53 lux, 91 lux, 111 lux, 168 lux, and 180 lux Second row: 91 lux, 61 lux, 128 lux, 40 lux, 67 lux, and 80 lux Average: 106.17 lux (below standard) Prayer Room Required Luminance (IESNA): 150 lux Room Area: 3.75 m x 7 m Height of working plane: 0.5 m Figure 3.7 Testing points in the Prayer Room 16 Recorded data (from left to right): H. First row: 39 lux, and 26 lux Second row: 44 lux, and 16 lux Average: 31.25 lux (below standard) Restroom Required Luminance (IESNA): 150 lux Room Area: 2mx7m Height of working plane: 0.84 m Figure 3.8 Testing points in the Restrooms Recorded data (from left to right): First row: 72 lux, and 65 lux Second row: 66 lux, and 67 lux Third row: 83 lux, and 81 lux Average: 72.33 lux (below standard) 17 I. Classrooms Overall, the establishment contains eleven classrooms. Every classrooms have the same dimension and lighting layout design. The design was able to conduct test for five classrooms. The team then computed for the average and assumed the same average for all of the classrooms within the establishment. Required Luminance (DepEd): 215 lux Room Area: 7.5 m x 7 m Height of working plane: 0.73 m Figure 3.9 Testing points in the Classrooms Recorded data (from left to right): First row: 150 lux, and 136 lux Second row: 141 lux, and 159 lux Third row: 145 lux, and 169 lux Average: 150 lux Average (per classrooms): 133.33, 155.17, 130, and 142.83 lux Overall average: 142.266 lux (below standard) 18 J. Hallway Required Luminance (IESNA): 100 lux Room Area: 30 m x 7 m Height of working plane: 0m Figure 3.10 Testing points in the Hallway Recorded data (from left to right): K. First half: 215 lux, 259 lux, 80 lux, and 98 lux Second half: 68 lux, 31 lux, 35 lux, and 98 lux Average: 106.875 lux (within the standard) Auditorium (Stage) Required Luminance (IESNA): 300 lux Room Area: 6.275 m x 7 m Height of working plane: 0.84 m Recorded data (from left to right): First row: 37 lux, and 32 lux Second row: 51 lux, and 0.11 lux Average: 30 lux 19 Figure 3.11 Testing points in the Auditorium (Stage) L. Auditorium (Fixed Seating) Required Luminance (IESNA): 300 lux Room Area: 15 m x 10 m Height of working plane: 0.5 m Figure 3.12 Testing points in the Auditorium (Fixed Seating) 20 Recorded data (from left to right): M. First row: 7 lux, 10 lux, 12 lux, and 20 lux Second row: 7 lux, 11 lux, 11 lux, and 19 lux Third row: 7 lux, 8 lux, 11 lux, and 20 lux Average: 11.92 lux Evidence Photos Figure 3.13 Library illuminance testing Figure 3.14 Classroom illuminance testing 21 Figure 3.15 Library illuminance testing Figure 3.16 Prayer room illuminance testing Figure 3.17 Auditorium (Stage) illuminance testing 22 Figure 3.18 Food Lab illuminance testing Figure 3.19 Cafeteria illuminance testing 3.1.2. Surveying The team designed a questionnaire which they will distribute to a number of students who use the facilities of the Pasig City Science High School building. A survey is done in order to assess the satisfaction of the users, which in this case are the students, to the current lighting system of the said establishment. A sample size of sixteen students answered the questionnaire for the assessment of the existing lighting system. The samples were randomly picked and was solely based on the classrooms with no on-going activities when the survey was conducted. Attached is the questionnaire used by the design team. 23 A. Sample Questionnaire 24 B. Survey Results Table 3.1 Survey Results Question Score 1 5 4 3 2 1 5 4 3 2 1 Yes No Every Week Every Month Every Year Seldom Yes No Excellent Above Average Average Below Average Poor 2 3 4 5 6 Room Assessed 401 403 302 4 4 2 2 1 2 2 4 3 2 1 1 1 3 1 5 3 2 3 2 Total 10 5 0 0 1 6 7 3 0 0 7 9 0 1 1 4 5 6 3 5 3 3 2 7 1 1 3 2 3 1 3 5 8 2 14 7 1 3 6 3 0 0 None Overall satisfaction of the students: 4.44 (88.8%) Quality of lighting fixture: 4.19 (83.8%) Is there inconvenience due to busted lights: 44% (Yes) Frequency of changing the fixture: 50% (Seldom) Is there some problems with the lighting fixtures: 88% (Yes) Quality of lighting system (w/o natural light): 4.25 (85%) 25 The results shows that the end-users of the facilities of Pasig City Science High School Building are satisfied with the current lighting system of the establishment. Based on the results of the survey, the students are 88.8% satisfied with the current lighting system. The quality of the current lighting system also scored a rather high value in accordance to the students’ preferences. The results also suggest that problems with the current lighting system are present which are mostly due to maintenance. 3.2. Design Strategies To design an efficient and reliable illumination system in the existing Pasig City Science High School, the team conduct proper illuminance testing using a lux meter for the classrooms and particular areas in the building, and observed the existing lighting system. After gathering data needed, the team will assess it based on standards and make an appropriate improvements if it fails to follow the standards and make this as their preliminary design. The team would also design tradeoff(s) in order to establish options for the most appropriate course of action for the improvement of the lighting system of the Pasig City Science High School building. After making design tradeoff(s), the team will select which of the following design tradeoffs is the most advantageous. The team used Lumen Method, an indoor lighting calculation methodology, in the computation of the number of luminaires necessary to achieve the standard average illuminance level, or alternatively, the computation of the luminaire’s luminance output needed given number of luminaires. It is an accurate method for indoor applications because it takes into consideration the effect that inter-reflectance has on the level of illuminance. 26 Lumen Method N= EA (nø)(MF)(UF) Where: N = number of Luminaire Required E = Maintained/Standard Illuminance (lux) A = Room Area = Lamp Output (lux) n = Number of Lamps in Luminaire MF = Maintenance Factor UF = Utilization Factor (lumens received in the Working Plane) The utilization factor takes into consideration the portion of light that is loss due to the absorption on the room surfaces. In acquiring the utilization factor, three factors should be taken into account. These three factors are the type of luminaire, room index, and reflectance of room surfaces. Room Index R. I. = LxW (L + W) Hm L = Length of the room W = Width of the room Hm = Height of working plane Table 3.2 Typical Reflectance Factor Color Light White or Cream 0.7 or 0.8 Yellow 0.6 Light Green or Pink 0.5 Sky Blue or Grey 0.4 Beige or Brown 0.3 27 Table 3.2 shows the reflectance factors that the team would use in acquiring the utilization factor. The table was obtained from Interior Lighting Design: A Student’s Guide. After calculating for the room index and determining the reflectance factor, the utilization factor is acquired from Table 3.3 shown below. Since all of the ceilings and walls in Pasig City Science High School is white or cream, the team only focused on the first row of Table 3.3. The table shown was also obtained from Interior Lighting Design: A Student’s Guide. Table 3.3 Typical Manufacturer’s data used to calculate utilization factor Room Room Index reflectance C W F 0.75 1.00 1.25 1.50 2.00 2.50 3.00 4.00 5.00 0.7 0.5 0.2 NA 0.61 0.65 0.67 0.70 0.71 0.73 0.74 0.75 0.3 NA 0.58 0.62 0.64 0.67 0.69 0.71 0.73 0.74 0.1 NA 0.56 0.59 0.62 0.65 0.68 0.69 0.71 0.73 NA 0.60 0.63 0.65 0.68 0.69 0.70 0.72 0.73 0.3 NA 0.58 0.61 0.63 0.66 0.68 0.69 0.71 0.72 0.1 NA 0.56 0.59 0.61 0.64 0.66 0.68 0.69 0.71 NA 0.59 0.62 0.64 0.66 0.67 0.68 0.69 0.70 0.3 NA 0.57 0.60 0.62 0.64 0.66 0.67 0.68 0.69 0.1 NA 0.55 0.58 0.60 0.63 0.65 0.66 0.68 0.68 NA 0.54 0.57 0.58 0.61 0.62 0.63 0.65 0.65 0.5 0.3 0.0 0.5 0.5 0.0 0.2 0.2 0.0 28 Calculations Given all the necessary formulas and tables, the design team proceeded to the calculation of the number luminaires required in a certain classification of room. The team determined the required lumens per room classification based on standards and selected a type of luminaire suitable for that room classification. Table 3.4 shows all room classification present in Pasig City Science High School and its respective standard luminance level. Table 3.4 Standard Luminance per Room Classification Room Classification Minimum Luminance (lux) Classroom 215 Faculty Office 300 Library Office 300 Restroom 150 Kitchen 150 Cafeteria 300 Food Laboratory 300 Hallway 100 Library 300 Auditorium (Stage) 300 Auditorium (Fixed Seating) 100 Prayer Room 150 The design team selected the luminaire to be used while taking into account the type of room it will be installed on. The team also considered aesthetics, wattage consumption, and the lux output of the luminaire. Philips was the lighting manufacturer selected by the design team because Philips provide all necessary components in their datasheets. Table 3.5 shows the selected luminaire and lamp by the design team. 29 Table 3.5 Selected Lamp and Luminance per Room Classification Room Classification Classroom Faculty Office Library Office Luminaire Lamp BCS460 LED48/840 W22L124 LIN-PC BBS560 LED35S/840 AC-MLO BCS460 LED48/840 W22L124 LIN-PC LED11S/840 Wattage Lux Output 38 4400 34 3500 38 4400 11 1250 25 2700 Restroom DN460B Kitchen PTP570P Cafeteria SP520P LED15S/830 25 3000 SP520P LED15S/830 25 3000 BCS460 LED48/840 W22L124 LIN-PC 38 4400 BCS460 LED48/840 W22L124 LIN-PC 38 4400 24 2700 LED20S/830 32 2000 LED28S/840 27 2800 Food Laboratory Hallway Library Auditorium (Stage) ST640T G2 Auditorium RC415B G2 (Fixed Seating) PSD W15L120 Prayer Room SM402C PSU W62L62 C LED27S/840 WB DF LED27S/840 MB 30 Table 3.6 shows the calculation for the room index. The distance of light from the ceiling is also taken into consideration. Once the room index is acquired, the utilization factor is taken from Table 3.3. All dimension measurements are in metric. Table 3.6 Calculation of Room Index Room Index 3.15 0.73 0 2.42 1.5 Faculty Office 2.75 7 3.15 0.73 0 2.42 0.8 Library Office 3.75 7 3.15 0.72 0 2.43 1.0 Restroom 2 7 3.15 0.84 0 2.31 0.7 Kitchen 3.75 7 3.15 0.74 1.05 1.36 1.8 Cafeteria 18.75 7 3.15 0.67 1.05 1.43 3.6 Food Laboratory 7.5 7 3.15 0.8 1.05 1.3 2.8 Hallway 30 7 3.15 0 0 3.15 1.8 Library 22.5 7 3.15 0.72 0 2.43 2.2 6.275 7 3.15 0.84 0 2.31 1.4 15 10 6.115 1.78 0 4.335 1.4 3.75 7 2800 3.15 0.5 0 2.65 Auditorium (Stage) Auditorium (Fixed Seating) Prayer Room Distance of 7 Light from 7.5 Classification of Height (m) Ceiling Relative Hm Working Plane (m) Height Ceiling Room Width Room Length Classroom Room Table 3.7 shows the number of luminaires to be used based on the calculated N. 31 Table 3.7 Selected Lamp and Luminance per Room Classification Room Classification # of E A n MF UF N Luminaires to be used Classroom 215 52.5 1 4400 1 0.67 4 4 Faculty Office 300 19.25 1 3500 1 0.61 3 3 Library Office 300 26.25 1 4400 1 0.61 3 3 Restroom 150 14 1 1250 1 0.61 3 3 Kitchen 150 26.25 1 2700 1 0.67 2 2 Cafeteria 300 131.25 2 3000 1 0.73 9 10 300 52.5 2 3000 1 0.71 4 4 Hallway 100 210 1 4400 1 0.67 7 7 Library 300 157.5 1 4400 1 0.7 15 16 300 43.925 1 2700 1 0.65 8 8 100 150 1 2000 1 0.65 12 12 150 26.25 1 2800 1 0.61 2 2 Food Laboratory Auditorium (Stage) Auditorium (Fixed Seating) Prayer Room Sample Calculation NClassroom = NClassroom = EA (nø)(MF)(UF) (215)(52.5) [(1)(4400)](1)(0.67) NClassroom = 3.83 Provide four luminaires for the classrooms 32 3.3. Design Codes and Standards Lighting must be responsive to the psychological and emotional needs of the learners. Lighting can make a school pleasant and attractive, reinforce feelings and spaciousness, delineate areas of different functions, stimulate learning and improve behavior. The overreaching goal of educational facility lighting is to provide a visual environment for both students and instructors that is supportive of the learning processes. The recommended classroom illuminance depends on the tasks to be performed. The tasks in most regular classrooms that occupy most of a pupil’s time include writing, reading goodquality printed material, and reading from overheads, chalkboards and whiteboards (IESNA, 2000). In this design project, the design team referred to the DepEd Educational Facilities Manual 2010 for the standard illumination level in school classrooms and referred to the IESNA Lighting Handbook for the standard illumination level for other facilities. According to the DepEd Educational Facilities Manual 2010, for most tasks common to schoolrooms, intensities of light from 20 to 40 foot candles are considered practical and satisfactory. The design team considered the 20 foot candles as the minimum standard. 20 foot candles is approximately equal to 215 lux. Regarding on the other facilities, the team referred to IESBA Lighting Handbook and was able to outline the table of minimum luminance shown below. 33 Table 3.8 Standard Luminance per Room Classification according to IESNA 3.4. Room Classification Minimum Luminance (lux) Faculty Office 300 Library Office 300 Restroom 150 Kitchen 150 Cafeteria 300 Food Laboratory 300 Hallway 100 Library 300 Auditorium (Stage) 300 Auditorium (Fixed Seating) 100 Prayer Room 150 Design Trade off The design team put into consideration the improvement of the current lighting system with a minimal cost of installation. This can be achieved by only replacing the existing luminaires in a way that the new ones can achieve the standard luminance per room with the same number of luminaire from the existing lighting layout. Contradicting from the previous design, in which the design team calculated for the number of required luminaire per room, the tradeoff design will start with the number of luminaire per room then the design team would calculate for the required lumens output per luminaire. The tradeoff design is based from the existing lighting layout of Pasig City Science High School. Since the layout of the lighting system in the auditorium, the team used the lighting layout of the auditorium from the previous design and adapted it to the new design. Using the utilization factor achieved from the previous calculations, together with the number of luminaires per classroom, the team calculated for the required lux output and number of lamps of the luminaire to be used. 34 The first proposed improvement lighting system requires rewiring of the lighting layout for every floor but the circuit breakers in every lighting panel for every floor remains the same so rewiring of the panel boards are not necessary. The same goes for the second proposed design. In this case, no rewiring is required. The quantity and the location of the luminaires is the same to the existing lighting layout design. Table 3.9 Computation for the n requirement Room N E A MF UF n Classroom 4 215 52.5 1 0.67 4212 Faculty Office 3 300 19.25 1 0.61 4734 Library Office 3 300 26.25 1 0.61 6455 Restroom 3 150 14 1 0.61 861 Kitchen 2 150 26.25 1 0.67 2938 Cafeteria 9 300 131.25 1 0.73 2997 Food Laboratory 4 300 52.5 1 0.71 2773 Hallway 9 100 210 1 0.67 3483 Library 15 300 157.5 1 0.7 5625 Prayer Room 2 150 26.25 1 0.61 3227 Classification Sample Calculation nø = EA (N)(MF)(UF) nøClassroom = (215)(52.5) (4)(1)(0.67) nøClassroom = 4212 lux Provide luminaire with one 4300 lux lamp or two 2150 lux lamps or any combination providing a total of 4300 lux. 35 Note: Use suspended luminaires for Cafeteria, Food lab, and Hallway which have a 1.05 meter distance from the ceiling. Choose for luminaires suitable for the room classification. Table 3.10 Selected Lamp and Luminance per Room Classification (Design 2) Room n Luminaire Lamp W Classroom 1 4300 SM544C PSD L1 LED43S/840 35.5 Faculty Office 1 4740 RC088B W60L120 LED44S/840 56.1 Library Office 1 6600 4MX850 491 LED66SS/830 60 Restroom 1 940 DN570C PSED - E LED12S/930 11.6 Kitchen 1 2942 PT570P LED25S/840 36 Cafeteria 1 3000 SP480P W24L134 LED30S/840 25 1 2942 PT570P LED25S/840 36 Hallway 1 3500 BCS460 W22L124 LED48/840 37.5 Library 1 6000 SM150C L1440 LED60S/840 55 Prayer Room 1 3800 DN570B PSED-E Classification Food Laboratory LED38S/TWH4000 33 36 CHAPTER IV DESIGN ANALYSIS AND CALCULATIONS 4.1. Design of Illumination Systems for Design 1 4.1.1. Lighting Fixtures Lay-out 4.1.2. Switching Lay-out 4.1.3. Lighting Panel Diagram 4.1.4. Lighting Fixture Schedule 37 4.1.5. Cost and Estimation Description Qty Rate (Php) Amount (Php) 6 1,980 11,880 109 18,104.31 1,973,369.79 3 36,208.62 108,625.86 6 17,069.85 102,419.10 2 31,811.85 63,623.70 14 34,035.75 476,500.5 8 19,656 157,248 12 72,397.71 868,772.52 2 6,304.41 12,608.82 11 60 660 ELECTRICAL INSTALLATION WORKS Copper cables (a) Royu RTN12A 150-meter roll 3.5 mm2 THHN Luminaires (Philips Supplier) (a) BCS460 W22L124 1 x LED48/840 LIN-PC (b) BBS560 1 x LED35S/840 AC-MLO (c) DN460B 1 x LED11S/840 C (d) PTP570P 1 x LED27S/840 WB DF (e) SP520P 1 x 15S/830 (a) ST640T G2 1 x LED27S/840 MB (f) RC415B G2 PSD W15L120 1 x LED20S/830 (g) SM402C PSU W62L62 1 x28S/840 Switches (a) Royu One Gang Switch with Reflector 38 (b) Royu Two Gang Switch with 14 96 1,344 3 132 396 10 146 1,460 (a) Royu Junction Box RJB1 156 19 2,964 (b) Royu Utility Box RUB1 38 19 722 150 28 4,200 200 2 400 Reflector (c) Royu Three Gang Switch with Reflector (d) Royu Three Gang 3-Way Switch Utility Boxes Conduits (a) VENDEX 3-m 20 mm PVC pipe (b) VENDEX 20 mm PVC Male Adapter TOTAL 3,787,194.29 39 4.2. Design of Illumination Systems for Design 2 4.2.1. Lighting Fixtures Lay-out 4.2.2. Switching Lay-out 4.2.3. Lighting Panel Diagram 4.2.4. Lighting Fixture Schedule 40 4.2.5. Cost and Estimation Description Qty Rate (Php) Amount (Php) ELECTRICAL INSTALLATION WORKS Copper cables (a) Royu RTN12A 2 1,980 3,960 (a) SM544C PSD L1 44 21,208.32 933,166.08 (b) RC088B W60L120 2 21,208.32 42,416.64 (c) 4MX850 491 2 9,828 19,656 (d) DN570C PSED - E 8 20,690.46 165,523.68 (e) PT570P 10 31,811.85 318,118.50 (f) SP480P W24L134 18 21,208.32 38,749.76 (g) BCS460 W22L124 45 29,747.50 1,338,637.50 (h) SM150C L1440 12 6,210.61 74,527.36 (i) DN570B PSED-E 2 7,977.04 15,954.09 (j) SM544C PSD L1 8 21,208.32 169,666.56 (k) SM402C PSU W62L62 3 6,440.50 19,321.50 (l) ST640T G2 8 19,557.09 156,456.72 (m)BCS360 W22L124 2 18,013.25 36,026.50 (n) G2 PSD RC415B W15L120 12 72,033.52 864,402.24 1 60 60 150-meter roll 3.5 mm2 THHN Luminaire (Philips Supplier) Switches (a) Royu One Gang Switch with Reflector 41 (b) Royu Two Gang Switch 1 96 96 1 132 132 (a) Royu Junction Box RJB1 25 19 475 (b) Royu Utility Box RUB1 3 19 57 50 28 1,400 53 2 106 with Reflector (c) Royu Three Gang Switch with Reflector Utility Boxes Conduits (a) VENDEX 3-m 20 mm PVC pipe (b) VENDEX 20 mm PVC Male Adapter TOTAL 4,198,909.13 42 CHAPTER V CONCLUSION AND RECOMMENDATION In this chapter, the design team would analyze the proposed designs under three factors in order to acquire the most effective design to be adapted as the new lighting system of Pasig City Science High School building. 5.1. Analysis of Return of Investments 5.1.1. Capital Costs Cost estimations for both the proposed design were already performed in Chapter 4. The capital cost for the adaptation of the Design 1 as the new lighting system of Pasig City Science High School building is Php 3,787,194.29. The capital cost for the installation of Design 2 on the other hand is Php 4,198,909.13. 5.1.2. Energy Savings The purpose of the improvement of the existing lighting system of the Pasig City Science High School is to assure that the luminance level per room classification is within the set standard. To guarantee that the proposed improvement of lighting system is effective, the design team analyzed the consumption of the existing lighting system and of the proposed lighting system, and examined if energy savings were achieved. The design team analyzed the one school week consumption, a total of five days, of the current lighting system assuming the operation from 7:30 AM up to 7:30 PM. That is a total of sixty (60) hours. The assumption is that all lighting fixtures are in full operation. The team also analyzed the winning design under the same condition. The calculation of the cost saved from the difference of consumption of the existing lighting system and of the proposed lighting system is 43 necessary for the calculation of return of investment. Since the team has no copy of the original lighting layout of the sixth floor of the Pasig City Science High School building, the team considered the consumption for the auditorium lighting system as a constant factor and can be neglected for the computation of the difference of energy consumption between the existing and the proposed design. Table 5.1 shows the overall load rating of the existing lighting system while Table 5.2 and 5.3 shows the load rating of the proposed lighting layout. Table 5.4 shows the energy saved for design 1 and 2. Table 5.1 Lighting load rating per floor of the existing layout Existing Lighting Layout Ground Floor 4 kW Second Floor 2.7 kW Third Floor 2.7 kW Fourth Floor 3.4 kW Fifth Floor 2.7 kW 15.5 kW Total Table 5.2 Lighting load rating of the Design 1 layout Design 1 Lighting Layout Luminaire Rating Qty Overall BCS460 W22L124 38 W 109 4.142 kW BBS560 34 W 3 0.102 kW DN460B 11 W 6 0.066 kW PTP570P 25 W 2 0.05 kW SP520P 25 W 14 0.35 kW SM402C PSU W62L62 27 W 2 0.054 kW Total 4.764 kW 44 Table 5.3 Lighting load rating of the Design 2 layout Design 2 Lighting Layout Luminaire Rating Qty Overall SM544C PSD L1 35.5 W 44 1.562 kW RC088B W60L120 56.1 W 2 0.1122 kW 4MX850 491 60 W 2 0.12 kW DN570C PSED - E 11.6 W 8 0.0928 kW PT570P 36 W 2 0.072 kW SP480P W24L134 25 W 18 0.45 kW PT570P 36 W 8 0.288 kW BCS460 W22L124 37.5 W 45 1.6875 kW SM150C L1440 55 W 12 0.66 kW DN570B PSED-E 33 W 2 0.066 kW SM544C PSD L1 35.5 W 8 0.284 kW Total 5.3945 kW Table 5.4 Energy Savings Analysis Energy Savings Energy Consumption For 60 hours Saved Energy Consumption (kWhx – kWhExisting) Existing 930 kWh - Design 1 285.84 kWh 644.16 kWh Design 2 323.67 kWh 606.33 kWh Using the kWh consumption saved from design 1 and design 2 we can compute for the return of investments. By multiplying the energy savings with the current electricity rate of Meralco (approximately Php10/kWh), the team achieved the weekly savings the operations of 45 the proposed designs. School years are commonly composed of 36 weeks. Return of Investment = ROI D1 = Capital Cost 36 weeks Php 10 year x kWh x Energy savings Php 3,787,194.29 36 weeks Php 10 year x kWh x 644.16 kWh 𝐑𝐎𝐈 𝐃𝟏 = 𝟏𝟔. 𝟑𝟑 𝐲𝐞𝐚𝐫𝐬 ROI D2 = Php 4,198,909.13 36 weeks Php 10 year x kWh x 606.33 kWh 𝐑𝐎𝐈 𝐃𝟐 = 𝟏𝟗. 𝟐𝟒 𝐲𝐞𝐚𝐫𝐬 5.1.3. Maintenance and Operational Costs The design decided that the maintenance cost for the proposed lighting system to be equal to zero because of the long-life and lowmaintenance for LED lamps. The operational cost is of each layout system was acquired from the previous discussion. In a daily basis, the operational costs for the designs 1 and 2 are 57.168 kWh and 64.734 kWh. 5.2 Approved Design for Retrofitting Based from the data calculated by the design team, the team came to the conclusion that design 1 is the winning design. This is based on the comparison between the capital cost, energy savings, and operational cost. Based on the survey conducted by the team, the students are satisfied by the current existing layout. The team’s recommendation is if the Pasig City Science High School targets to continue with their lightings system, the client should improve their maintenance system. 46