Available online at www.sciencedirect.com ScienceDirect ScienceDirect Energy Procedia 00 (2018) 000–000 Available onlineatatwww.sciencedirect.com www.sciencedirect.com Available online Energy Procedia 00 (2018) 000–000 ScienceDirect ScienceDirect www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia Energy Procedia Procedia 00 160(2017) (2019)000–000 92–99 Energy www.elsevier.com/locate/procedia 2nd International Conference on Energy and Power, ICEP2018, 13–15 December 2018, 2nd International Conference on Energy and Power, ICEP2018, 13–15 December 2018, Sydney, Australia Sydney, Australia Performance and emission analysis of a diesel engine running on Performance andInternational emission analysis a diesel engine running on The 15th onofDistrict Heating and Cooling palmSymposium oil diesel (POD) palm oil diesel (POD) Assessing the feasibility the heat demand-outdoor S. Bari* of andusing S. N. Hossain S. Bari* and S. N. Hossain temperature function for a long-term district heat demand forecast School of Engineering, University of South Australia, Mawson Lakes, South Australia, 5095, Australia School of Engineering, University of South Australia, Mawson Lakes, South Australia, 5095, Australia I. Andrića,b,c*, A. Pinaa, P. Ferrãoa, J. Fournierb., B. Lacarrièrec, O. Le Correc Abstract a IN+ Center for Innovation, Technology and Policy Research - Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal Abstract b Veolia oils Recherche Innovation, 291 Avenue 78520 Limay, France Biodiesels derived from vegetable have a&feasible potential to beDreyfous used as Daniel, fuels for internal combustion (IC) engines. Among c Département Systèmes Énergétiques et Environnement IMT Atlantique, 4 rue Alfred Kastler, 44300 Nantes, various types of vegetable-oil-based biodiesel, palm-oil-based biodiesel seems to be a promising alternative renewable fuel. Biodiesels derived from vegetable oils have a feasible potential to be used as fuels for internal combustion (IC)France engines. Among Physicochemical of palm oilbiodiesel, diesel (POD), which is a biodiesel methyl ester fromtocrude oil (CPO) and crude palm stearin various types of properties vegetable-oil-based palm-oil-based seems be a palm promising alternative renewable fuel. (CPS), are similarproperties to petro-diesel. work (POD), presentswhich the performance of a diesel engine run oil on(CPO) POD. and The crude experiments were Physicochemical of palmThis oil diesel is a methyl ester from crude palm palm stearin conducted a small PetterThis AC1work dieselpresents engine. the Dueperformance to lower calorific value, break consumption of PODwere was (CPS), are on similar to Cussons petro-diesel. of a diesel enginespecific run on fuel POD. The experiments Abstract on averageon 10% higher than petro-diesel However, fuel-borne in POD, the thermal efficiency of POD was conducted a small Cussons Petter AC1run. diesel engine. due Due to to the lower calorificoxygen value, break specific fuel consumption close to petro-diesel operation. The maximum efficiencies areto20% 21% foroxygen POD and petro-diesel, respectively. The on average 10% higher than petro-diesel run. However, due the and fuel-borne in POD, the thermal efficiency of emissions POD was District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the of COtoand unburnt HC were better with PODefficiencies having CO are 51% andand HC21% 55%forlower petro-diesel run, respectively. However, close petro-diesel operation. The maximum 20% PODthan and petro-diesel, respectively. The emissions greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat dueCO to higher combustion temperature andPOD oxygenated fuel,51% the and NOXHC emission with than PODpetro-diesel was on average higher than petroof and unburnt HC were better with having CO 55% lower run, 33% respectively. However, sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, diesel During the experiment, withand POD the enginefuel, performed smoothly, notPOD exhibit and than no audible due to run. higher combustion temperature oxygenated the NOX emissiondid with wasany on starting average problem 33% higher petroprolonging the investment return period. enginerun. knocking diesel Duringwas thenoticed. experiment, with POD the engine performed smoothly, did not exhibit any starting problem and no audible The main scope of this paper is to assess the feasibility of using the heat demand – outdoor temperature function for heat demand engine knocking was noticed. forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 © 2018 The Authors. Published by Elsevier Ltd. buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district © 2019 The Authors. by Elsevier Ltd. This is an open accessPublished article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were Selection under responsibility of the scientific committee of the 2nd International Conference on Energy and This is an and openpeer-review access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection peer-review responsibility of themodel, scientific committee of the and 2ndvalidated International comparedand with results fromunder a dynamic heat demand previously developed by theConference authors. on Energy and Power, ICEP2018. Selection and peer-review under responsibility of the scientific committee of the 2nd International Conference on Energy and Power, ICEP2018. The results showed that when only weather change is considered, the margin of error could be acceptable for some applications Power, ICEP2018. (the errorPalm in annual demand wasemission lower than 20% for all weather scenarios considered). However, after introducing renovation Keywords: oil diesel; biodiesel; scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). Keywords: Palm oil diesel; biodiesel; emission The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations. © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the Scientific Committee * Corresponding author. Tel.: +618 8302 3439; fax: +618 8302 3380.of The 15th International Symposium on District Heating and Cooling. E-mail address: saiful.bari@unisa.edu.au * Corresponding author. Tel.: +618 8302 3439; fax: +618 8302 3380. E-mail address: saiful.bari@unisa.edu.au Keywords:©Heat Forecast; Climatebychange 1876-6102 2018demand; The Authors. Published Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) 1876-6102 © 2018 The Authors. Published by Elsevier Ltd. Selection under responsibility of the scientific of the 2nd International Conference on Energy and Power, ICEP2018. This is an and openpeer-review access article under the CC BY-NC-ND licensecommittee (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of the scientific committee of the 2nd International Conference on Energy and Power, ICEP2018. 1876-6102 © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the Scientific Committee of The 15th International Symposium on District Heating and Cooling. 1876-6102 © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of the scientific committee of the 2nd International Conference on Energy and Power, ICEP2018. 10.1016/j.egypro.2019.02.123 S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 2 93 1. Introduction Petroleum fuels are currently the main source of energy supply for this modern civilization. Petroleum-based fuels have significant impact on global economy through transportation and energy conversion sectors [1-3]. Middle Eastern region has supplied about half of the oil production in the world and the rest has come from the central Asia region and American continent [4]. However, in recent years, depleting crude oil reserves and environmental issues have become major concerns for internal combustion (IC) engine manufacturers and researchers. As a result, researchers are trying to find alternative fuels, improve the efficiency of IC engines [5, 6] and recover waste heat from engines [7-9]. They are looking for renewable fuels with similar physicochemical characteristics to petroleum fuels so that it can be used in the existing engines without or with minimum modification to the engine [10, 11]. The use of alternative fuels, which are renewable and environmentally friendly have the potential to solve or at least ease the petroleum fuel crisis [12]. Vegetable oil for CI engines can be a potential solution and it has a long history to use in IC engines. Rudolf Diesel, the inventor of the diesel engine, ran his first engine on vegetable oils At the Paris World Exhibition in the year 1900; he presented a small diesel engine running on peanut oil. This proves that CI engines can run on vegetable-oil-based fuels. The vegetable-oil-based biodiesel fuels have similar physicochemical properties [13-16] and these make them primary choice for alternative fuels to be used in CI engines with insignificant or no alteration to the engine. Several vegetable-oil-based biodiesels can be used in CI Engines. Among different potential vegetable-oil-based biodiesels, palm oil diesel (POD) is studied in this current work. The physicochemical properties of biodiesels derived from few vegetable oils, petro-diesel and POD are presented in Table 1. It is evident from the table that the density and viscosity of POD are higher than those of petro-diesel, which can be compensated by blending it with petro-diesel or alcohol [17]. Cetane number (CN) of POD is higher than petro-diesel and this can result in shorter ignition delay making the peak combustion temperature and pressure higher generating better performance. In contrast, the heating value of POD is lower than that of petro-diesel that will result in higher brake specific fuel consumption than petro-diesel. Table 1. Properties of different vegetable oils compared with petro-diesel [4, 18-20] Properties Rapeseed oil Soybean oil Palm oil diesel Sunflower oil Petro-diesel Density [kg/m3] 882 885 880 885 835 Kinetic viscosity [mm2/s] 4.2 4 4.61 4 2.95 Heating value [MJ/kg] 37.2 37.1 38.5 37.1 44.8 Flash point [℃ ] 278 315 314 316 70 51 56 64 61.2 54 Cetane number Kalam and Masjuki [21] concludes from their research that POD meets the requirement of diesel engine combustion and is comparable with other biodiesels derived from soybean and rape seed oils. Researchers from Malaysia Palm Oil Board (MPOB) has been the pioneer since 1980s doing research and development on palm oil as a fuel, and developed several processes to convert crude palm oil (CPO) to POD [4]. They completed a field trial in two phases on eight taxis using POD. Their objectives were to study the performance of the diesel engine and the behaviour of lubricating oils of diesel engines when fuelled with POD. The overall results showed that most emissions were reduced and the performances were comparable. Ali et al. [19] experiment on a four-cylinders, four-strokes, direct-injection diesel engine operating with POD-diesel blend. The results showed that the engine brake power, torque and brake specific fuel consumption were comparable with petro-diesel fuel when fuelled with POD-diesel blend under various operating conditions. This paper presents the investigation of performance and emission behaviour of a diesel engine run on POD and compares those with petro-diesel runs. It was found from the literature that most of the researches were conducted with POD blend and at a constant speed of the engine. However, in this work, 100% POD was used as a fuel and the performance and emission were investigated at various speeds. The stationary experiment was carried out on a Cussons Petter AC1 diesel engine. Engine performance parameters such as brake torque, thermal efficiency, specific fuel consumptions were measured at three speeds for both POD and petro-diesel engine. The emissions from the S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 94 3 engine were also investigated. 2. Experimental Setup The engine used for this research was a 5 kW Cussons air-cooled single-cylinder indirect-injection diesel engine with a Ricardo comet-type-swirl combustion chamber. The engine was air-cooled and therefore, it is expected to run hotter compared to a water-cooled engine. Accordingly, the mean cycle temperatures will be higher which is expected to provide a smoother combustion for higher viscous POD fuel. The specification of the engine is given in Table 2. Table 2. Engine specification. Model P8163 PETTER AC1 Manufacturer G. Cussons Ltd. Type 4-stroke, air-cooled diesel engine Capacity 304 cc Bore 76.2 mm Stroke 66.7 mm Compression ratio 17:1 Lubrication Splash system For testing the engine, the Cussons single-cylinder engine test bed model P8160 was used. This test bed uses a DC motor generator with a swinging field for torque measurement and as a dynamometer to load the engine. An electronic thyristor drive and a closed-loop speed control unit were employed so that the DC machine could be used for engine cranking during starting, motoring when required and for power absorbing duties. A schematic diagram of the experimental set-up is shown in Fig. 1. The emissions were measured with a gas analyser COSA 6000. Air Box Fuel consumption Meter Fuel Tank Dynamometer Diesel Engine Gas Analyser Fig. 1. A schematic diagram of the experimental setup. S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 4 95 3. Results 3.1. Performance analysis Performance of an engine significantly depends on the fuel characteristics. In this work, the engine was run on both POD and petro-diesel fuels. The performance of the engine for both fuels are discussed in the preceding sections. 3.1.1. Brake torque The variations of engine brake torque with brake power and speed are presented in Fig. 2. The brake power of an engine is directly proportional to the brake torque [22, 23] and a similar linear trend is exhibited in this experiment. It was observed that the brake torques for POD were on average 5.3% lower than those of petro-diesel. This is attributed to the fact that POD has lower heating value than that of petro-diesel [24]. Other than lower heating value, the higher density and viscosity of POD resulted in lack of mixing of air and fuel particles in the combustion chamber due to lower velocity and volatility of POD, which affected the combustion efficiency [25, 26]. 3.1.2. Brake specific fuel consumption (BSFC) Brake specific fuel consumption (bsfc) measures the fuel flow rate per unit of power output. It is obvious that lower bsfc is desirable and for compression ignition engine it can be as low as 200 g/kWh [27]. The bsfc behavior at different brake powers is presented in Fig. 3. The bsfc started to decrease exponentially as the engine was loaded and increased after the rated power. Within the range of medium to maximum brake power, the bsfc was marginally higher for POD due to lower calorific value owing to the presence of fuel-borne oxygen in POD [2, 17, 25]. Accordingly, in order to maintain the same brake power output, the bsfc of POD increased to compensate for the reduction of the chemical energy in the fuel [2, 17, 19]. The lowest values achieved in the tests were approximately 440 g/kWh for POD and approximately 400 g/kWh for petro-diesel at all speeds. On average, bsfc of POD was 10% higher than that of petrodiesel fuel. 1600 1400 10 8 6 Diesel, Speed 2000 rpm POD, Speed 2000 rpm Disel, speed 2500 rpm POD, Speed 2500 rpm Diesel, Speed 2800 rpm POD, Speed 2800 rpm 4 2 0 Diesel:2000 rpm POD:2000 rpm Disel:2500 rpm POD:2500 rpm POD:2800 rpm Diesel:2800 rpm 1200 bsfc, g/kWh Brake Torque, Nm 12 0 1 2 3 brake power, kW Fig. 2. Brake torque vs brake power for POD and petro-diesel. 1000 800 600 400 200 0 4 0 1 2 3 4 brake power, kW Fig. 3. Bsfc vs brake power for POD and petro-diesel. 3.1.3. Brake thermal efficiency Brake thermal efficiency is a measure of the efficiency of a combustion engine, which measures the percentage of work produced in relation to the heat energy. It was found that the thermal efficiency was slightly lower in the case of POD than that of petro-diesel. The variation of thermal efficiency with brake power is presented in Fig. 4. The maximum efficiencies achieved were approximately 20% for POD and 21% for petro-diesel. The 10% higher fuel consumption by POD due to lower calorific value has been reduced to 5% lower efficiency means that the combustion with POD was better than diesel due to the fuel-borne oxygen present in POD [19, 21, 28]. S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 96 5 3.2. Emissions analysis The use of biodiesel can reduce the greenhouse gas (GHG) emission significantly. Not only biodiesels like POD have carbon neutrality in their life cycle as the plant producing biodiesel consumes the CO2 produced by the combustion, they do not contribute to the net increase of carbon dioxide in the atmosphere. In this study, the emissions from the POD and petro-diesel are studied and presented in the next section. 3.2.1. NOx emission 25 600 20 500 NOx , ppm Thermal Efficiency, % Nitrogen oxides (NOx) is a general representation for NO and NO2 [29]. Usually, biodiesel always have higher NOx emission than the petro-diesel due the oxygen molecules present in biodiesel molecule [19, 28]. It was reported by the United States Environmental Protection Agency (EPA) that 100% biodiesel fuel would emit 10% more NOx than conventional petro-diesel [30, 31]. Similar behavior is found in this experiment and presented in Fig. 5. For POD, with increasing load emission of NOx increased. It is found that at 2800 rpm NOX was 520 ppm for POD whereas it was only 192 ppm for petro-diesel. On average, POD produced 33% higher NOX than the runs with petro-diesel. The higher emission with POD is due to the higher adiabatic flame temperature, less radiative heat transfer, decrease in ignition delay, higher degree of unsaturation, and higher oxygen content [19, 28, 32]. Shorter ignition delay (higher CN) means that the fuel will auto-ignite earlier which moves the peak pressure more towards TDC that could lead to higher combustion temperature. Higher exhaust gas temperature shown in Fig. 6 confirms that the maximum temperature during combustion was higher for POD. The presence of oxygen in biodiesel molecule and this higher combustion temperature which are precondition of NOX formation, led to higher NOX emissions [19, 25, 28]. 15 10 Diesel:2000 rpm POD:2000 rpm Disel:2500 rpm POD:2500 rpm Diesel:2800 rpm POD:2800 rpm 5 0 0 1 2 brake power, kW 3 Diesel, Speed 2000 rpm POD, Speed 2000 rpm Diesel, Speed 2500 rpm POD, Speed 2500 rpm Diesel, Speed 2800 rpm POD, Speed 2800 rpm 400 300 200 100 0 4 Fig. 4. Thermal efficiency vs brake power for POD and petro-diesel. 0 1 2 Brake Power, kW 3 4 Fig. 5. NOx emission vs brake power for POD and petro-diesel. 3.2.2. CO emission The development of carbon monoxide in a combustion process is due to incomplete combustion [33]. The CO emission depends on air-fuel ratio (AFR). Lower AFR contribute to higher CO emission due lower oxygen availability. AFR decreased with increasing loads as shown in Fig. 7 and thus, decreased the conversion of CO to CO2 that resulted in higher carbon monoxide emission at higher brake powers of the engine as shown in Fig. 8. From the graph, it is evident that POD emitted less CO than petro-diesel. POD emitted on average about 51% lower CO than petro-diesel for all speed range. The significant decrease in CO emissions when running on POD compared to running on petrodiesel fuel can be attributed to the fact that the carbon content of POD was lower than that of petro-diesel fuel. Another reason was that the higher oxygen availability in POD enabled complete combustion, which produced lower CO compared to petro-diesel [33]. S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 6 97 3.2.3. Hydro Carbon (HC) emission 600 70 500 60 Diesel, Speed 2000 rpm 400 POD, Speed 2000 rpm 300 Disel, speed 2500 rpm Air-Fuel Ratio Exhaust Gas Temperature, ̊C Unburnt hydrocarbon (HC) is another key emission from diesel engines. The HC missions found from the experiment are presented in Fig. 9. Unburnt HC emission depends on fuel characteristics, engine-operating conditions and fuel injection characteristics [17, 19, 21]. It was found from the figure that average unburnt HC for POD and petro-diesel were 47 ppm and 107 ppm, respectively for the entire engine speed and brake power ranges. The average HC emission was reduced by 55% for POD than petro-diesel. This reduction is an indication of better HC oxidation due to higher cetane number and oxygen content of POD. 50 40 30 200 POD, Speed 2500 rpm 100 Diesel, Speed 2800 rpm 10 POD, Speed 2800 rpm 0 0 0 1 2 3 Diesel:2000 rpm POD:2000 rpm Disel:2500 rpm POD:2500 rpm Diesel:2800 rpm POD:2800 rpm 20 4 0 1 2 brake power, kW brake power, kW 1800 1600 1400 1200 1000 800 600 400 200 0 Diesel:2000 rpm POD:2000 rpm Diesel:2500 rpm POD:2500 rpm Diesel:2800 rpm POD:2800 rpm 0 1 2 Brake Power, kW 3 4 Fig. 7. AFR vs brake power for POD and petro-diesel. 180 160 140 120 100 80 60 40 20 0 Diesel:2000 rpm POD:2000 rpm Diesel:2500 rpm POD:2500 rpm Diesel:2800 rpm POD:2800 rpm HC , ppm CO , ppm Fig. 6 Exhaust temperature vs brake power for POD and petro-diesel. 3 4 Fig. 8. CO emission vs brake power for POD and petro-diesel. 0 1 2 Brake Power, kW 3 Fig. 9. HC emission vs brake power for POD and petro-diesel. 4. Conclusion In this work, experiment was conducted with biodiesel derived from palm oil, named as Palm Oil Diesel (POD) on a Cussons air-cooled single-cylinder indirect-injection diesel engine. In terms of physicochemical properties, POD has lower calorific value and higher cetane number, density and viscosity than those of petro-diesel. The engine performed smoothly, did not exhibit any starting problems and no audible knock occurred while running on POD. Due to lower calorific value of POD, the fuel consumption was higher than petro-diesel, which led to higher brake specific fuel consumptions. On average, POD had 10% higher bsfc than petro-diesel run. The oxygen content in POD 4 S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 98 7 helped better combustion with POD resulting only 5% lower efficiency than petro-diesel. However, due to better combustion which resulted in higher combustion temperature and presence of oxygen in the biodiesel molecule produced more NOX emission than petro-diesel. On average, it was 33% higher. The CO emission was on average 51% lower than petro-diesel due to the oxygen molecule present in biodiesel. For the same reason, the HC emission was also 55% lower than that of petro-diesel. From the analyses, it can be concluded that POD is suitable alternative renewable fuel for diesel engines. However, endurance tests need to be conducted to find out the long-term effect of using POD in diesel engines. References [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] S. N. Hossain and S. Bari, "Additional power generation from the exhaust gas of diesel engine by bottoming rankine cycle," SAE Paper: 2013-01-1639, pp. 1-11, 2013. A. Murugesan, C. Umarani, R. Subramanian, and N. Nedunchezhian, "Bio-diesel as an alternative fuel for diesel engines—A review," Renewable and Sustainable Energy Reviews, vol. 13, no. 3, pp. 653-662, 2009. J. C. de Oliveira Matias and T. C. Devezas, "Consumption dynamics of primary-energy sources: The century of alternative energies," Applied Energy, vol. 84, no. 7, pp. 763-770, 2007. M. H. Mat Yasin, R. Mamat, G. Najafi, O. M. Ali, A. F. Yusop, and M. H. Ali, "Potentials of palm oil as new feedstock oil for a global alternative fuel: A review," Renewable and Sustainable Energy Reviews, vol. 79, pp. 1034-1049, 2017. A. Ibrahim, S. Bari, and F. Bruno, "A study on EGR utilization in natural gas SI engines using a two-zone combustion model," SAE Technical Paper 2007-01-2041, pp. 1-10, 2007. M. Kanogˇlu, S. Kazım Işık, and A. Abuşogˇlu, "Performance characteristics of a diesel engine power plant," Energy Conversion and Management, vol. 46, no. 11, pp. 1692-1702, 2005. S. Bari and S. N. Hossain, "Design and optimization of compact heat exchangers to be retrofitted into a vehicle for heat recovery from a diesel engine," Procedia Engineering, vol. 105, pp. 472-479, 2015. S. Hossain and S. Bari, "Effect of different working fluids on shell and tube heat exchanger to recover heat from exhaust of an automotive diesel engine," World Renewable Energy Congress pp. 764-71, 2011. M. He, X. Zhang, K. Zeng, and K. Gao, "A combined thermodynamic cycle used for waste heat recovery of internal combustion engine," Energy, vol. 36, no. 12, pp. 6821-6829, 2011. I. Saad and S. Bari, "CFD investigation of in-cylinder air flow to optimize number of guide vanes to improve CI engine performance using higher viscous fuel," International Journal of Automotive and Mechanical Engineering, vol. 8, p. 1096, 2013. I. Saad and S. Bari, "Effects of guide vane swirl and tumble device (GVSTD) to the air flow of naturally aspirated CI engine," in International Conference on Mechanical Engineering (ICME), Dhaka, Bangladesh, 2011. I. Saad, S. Bari, and S. N. Hossain, "In-cylinder air flow characteristics generated by guide vane swirl and tumble device to improve air-fuel mixing in diesel engine using biodiesel," Procedia Engineering, vol. 56, pp. 363-368, 2013. S. Che Mat, M. Y. Idroas, M. F. Hamid, and Z. A. Zainal, "Performance and emissions of straight vegetable oils and its blends as a fuel in diesel engine: A review," Renewable and Sustainable Energy Reviews, vol. 82, pp. 808-823, 2018. D. Capuano, M. Costa, S. Di Fraia, N. Massarotti, and L. Vanoli, "Direct use of waste vegetable oil in internal combustion engines," Renewable and Sustainable Energy Reviews, vol. 69, pp. 759-770, 2017. B. Sajjadi, A. A. A. Raman, and H. Arandiyan, "A comprehensive review on properties of edible and nonedible vegetable oil-based biodiesel: Composition, specifications and prediction models," Renewable and Sustainable Energy Reviews, vol. 63, pp. 62-92, 2016. I. Saad and S. Bari, "Improving air-fuel mixing in diesel engine fuelled by higher viscous fuel using guide vane swirl and tumble device (GVSTD)," SAE Technical Paper 2013-01-0867, pp. 1-10, 2013. C. D. Rakopoulos, K. A. Antonopoulos, D. C. Rakopoulos, D. T. Hountalas, and E. G. Giakoumis, "Comparative performance and emissions study of a direct injection diesel engine using blends of diesel fuel with vegetable oils or bio-diesels of various origins," Energy Conversion and Management, vol. 47, no. 18, pp. 3272-3287, 2006. 8 [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] S. Bari et al. / Energy Procedia 160 (2019) 92–99 S Bari and S N Hossain / Energy Procedia 00 (2018) 000–000 99 A. Atmanli, "Comparative analyses of diesel–waste oil biodiesel and propanol, n-butanol or 1-pentanol blends in a diesel engine," Fuel, vol. 176, pp. 209-215, 2016. O. M. Ali, R. Mamat, N. R. Abdullah, and A. A. Abdullah, "Analysis of blended fuel properties and engine performance with palm biodiesel–diesel blended fuel," Renewable Energy, vol. 86, pp. 59-67, 2016. C. T. Chong, J.-H. Ng, S. Ahmad, and S. Rajoo, "Oxygenated palm biodiesel: Ignition, combustion and emissions quantification in a light-duty diesel engine," Energy Conversion and Management, vol. 101, pp. 317-325, 2015. M. A. Kalam and H. H. Masjuki, "Biodiesel from palmoil—an analysis of its properties and potential," Biomass and Bioenergy, vol. 23, no. 6, pp. 471-479, 2002. S. N. Hossain and S. Bari, "Waste heat recovery from exhaust of a diesel generator set using organic fluids," Procedia Engineering, vol. 90, pp. 439-444, 2014. T. Ho, V. Karri, D. Lim, and D. Barret, "An investigation of engine performance parameters and artificial intelligent emission prediction of hydrogen powered car," International Journal of Hydrogen Energy, vol. 33, no. 14, pp. 3837-3846, 2008. A. M. Liaquat et al., "Effect of coconut biodiesel blended fuels on engine performance and emission characteristics," Procedia Engineering, vol. 56, pp. 583-590, 2013. M. Habibullah, H. H. Masjuki, M. A. Kalam, I. M. Rizwanul Fattah, A. M. Ashraful, and H. M. Mobarak, "Biodiesel production and performance evaluation of coconut, palm and their combined blend with diesel in a single-cylinder diesel engine," Energy Conversion and Management, vol. 87, pp. 250-257, 2014. R. Behçet, R. Yumrutaş, and H. Oktay, "Effects of fuels produced from fish and cooking oils on performance and emissions of a diesel engine," Energy, vol. 71, pp. 645-655, 2014. J. B. Heywood, Internal Combustion Engines Fundamentals. New York: McGraw Hill International, 1988. S. Bari, "Performance, combustion and emission tests of a metro-bus running on biodiesel-ULSD blended (B20) fuel," Applied Energy, vol. 124, pp. 35-43, 2014. I. M. Rizwanul Fattah, H. H. Masjuki, A. M. Liaquat, R. Ramli, M. A. Kalam, and V. N. Riazuddin, "Impact of various biodiesel fuels obtained from edible and non-edible oils on engine exhaust gas and noise emissions," Renewable and Sustainable Energy Reviews, vol. 18, pp. 552-567, 2013. E. Cecrle et al., "Investigation of the Effects of Biodiesel Feedstock on the Performance and Emissions of a Single-Cylinder Diesel Engine," Energy & Fuels, vol. 26, no. 4, pp. 2331-2341, 2012. P. D. Patil and S. Deng, "Optimization of biodiesel production from edible and non-edible vegetable oils," Fuel, vol. 88, no. 7, pp. 1302-1306, 2009. J. Sun, J. A. Caton, and T. J. Jacobs, "Oxides of nitrogen emissions from biodiesel-fuelled diesel engines," Progress in Energy and Combustion Science, vol. 36, no. 6, pp. 677-695, 2010. C. İlkiliç and R. Behçet, "The reduction of exhaust emissions from a diesel engine by using biodiesel blend," Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, vol. 32, no. 9, pp. 839-850, 2010.