REPORT OF EDUCATIONAL VISIT at Dhom-balkawadi dam’s hydro-electric power plant Class : TE (Civil) VPCOE, Baramati (Date:- 6th Sept 2013) Department of Civil Engineering of Vidya Pratishthan’s College of Engineering, organized one day educational visit to Dhom Balkawadi Dam, Wai (near Mahabaleshwar), Maharashtra on 6th September 2013 for 71 T.E. Civil Engineering students along with 4 staff members to study different aspects of Hydroelectric power generation and discharge through spillway. (http://wikimapia.org/#lat=17.9579062&lon=73.7058104&z=15&l=0&m=h) Visit was organized with the prior permission and under guidance of honorable Dr. S. B. Deosarkar Sir (Principal, VPCOE), Prof. G. N. Narule (Head of Civil Engg Dept). Er. Pravin Ghorpade (Engineer from Irrigation Dept), Er Prakash Gaikwad from Dhom-Balkawadi Dam Site helped a lot to take permission of visit from regional office of Irrigation Department. Er. Suren Hiray (The Executive Engineer, Dhom Balkawadi Project Division.Wai, Dist:- Satara) kindly permitted us for Visit of Dam. Er Prakash Gaikwad guided us during Visit of Dam and showed us all Dam features. Mr. Satish Taware sir (PRO, VPCOE) and Mr. Shasahank Dandvate helped us in arranging Buses from Venkatesh Travels, Baramati with good drivers who took and brought us back safely. Our teachers Prof. Dilip G. Patil & Prof. Ms. S. B. Walke along with Mr. Vinit Thombare (Technical assistant-Workshop), Mr. Kiran Taware (Assistant) took hard efforts in planning and arranging this highly successful visit. Students of T.E. Civil specially Bamane Eshwar R, & Gadade Vikram B, Kaldate Abhijit S, Kamble Vishal V, Khalate Bharat S, Kudale Chaitanya M, Maske Umesh A, Nagpure Akshay M, Narode Sharad B, Shingate Swapnil H (Class representative) and some other students took the initiative & under the continuous guidance of our teachers, made the visit a grand success. Students left the college for visit on 6th September at 6.10 am and did breakfast on the way. We reached Wai at 11.00 am. and then we moved towards ‘Dhom Balakwadi Dam’ and reached at 12.00 PM. DHOM - BALKAWADI DAM DHOM BALKAWADI DAM This dam is constructed across the river Krishna. Krishna river is one of the longest rivers in central-southern India, about 1,300 kilometers (810 mi). flows through the states Maharashtra , Karnataka , Andhra Pradesh and ends in bay. SPECIFICATION: Opening date : 1996 Completion date : 2002 Owner(s) : Government of Maharashtra, India Type : Earth-fill Gravity Height : 65.10 m Length : 1211 m Volume : 6,335 km3 (1,520 cu mi) Impounds : Krishna river Reservoir Capacity : 331,100 km3 (79,400 cu mi) Surface area : 2,498 km2 (964 sq mi) Catchment area (Th ha) : 21.756 • PURPOSE: Irrigation - The construction of this dam was started in 1996. The major purpose of this dam is the supply of water to the agriculture, industries, and for drinking. • Water supply is majorly done for Wai, Phaltan, Khandala, Bhor, Panchgani Mahabaleshwar and the surrounding villages on the bank of the dam. This dam supplie’s water to agricultural land of the Wai, Koregaon, Satara , Javli and Khandala talukas. The catchment area (42.77 km2) dams the Krishna River and forms the Dhom Lake which is approximately 20 km (11 miles) in length. Completed in 2002, it is one of the largest civil engineering projects commissioned after Indian independence. The Dhom electricity project is run by the Maharashtra State Electricity Board. Storage capacity of Dhom dam is 4.16 T.M.C Hydroelectricity - The Dhom generates electricity of 4 MG from the basement electricity house. Hydraulic power plant- Power House Students carefully studied and observed the generation of electricity by turbines. The Francis turbine is a reaction turbine, which means that the working fluid changes pressure as it moves through the turbine, giving up its energy. Francis turbine requires 428 RPM to rotate.Unit power generation is about 3200 unit/hr. A casement is needed to contain the water flow, The turbine is located between the high-pressure water source and the low-pressure water exit, usually at the base of a dam(head 33m ± 10) .The inlet is spiral shaped. Guide vanes direct the water tangentially to the turbine wheel, known as a runner. This radial flow acts on the runner's vanes, causing the runner to spin. The guide vanes (or wicket gate) may be adjustable to allow efficient turbine operation for a range of water flow conditions. Circumference of the inlet turbine pipe is about 72 inches. As the water moves through the runner, its spinning radius decreases, further acting on the runner. For an analogy, imagine swinging a ball on a string around in a circle; if the string is pulled short, the ball spins faster due to the conservation of angular momentum. This property, in addition to the water's pressure, helps Francis and other inward-flow turbines harness water energy efficiently. Penstock Carrying Water from Reservoir under high Pressure Guide vane The spillways were of Ooge Type. its length was of 41 m, Radial type of spillway gates were used which were 3 in number and its size is of 20X20 m. There’s an energy dissipater arrangement at the end spillway to avoid the erosion of the Bed. Channel ahead of Spillway Butterfly valve one of the fantabulous structure at the dam. The main principle of butterfly valve is energy dissipation and reduction of erosion of rock. When water flows from high head , there is varying of kinetic energy of water and due to this phenomenon there is a possibility of erosion of rock The butterfly valve sprinkle’s water in all direction with constant kinetic energy, it look’s like butterfly wings hence its called as butterfly valve. Butterfly Valve There are three spillway gates through which water from the Reservoir is allowed to flow to downstream. Spillway Gates These are mechanically operated radial gates. Design flood cumec: 1758 and cusec : 62084, Flood depth is about 0.625 m whereas Spillway length is about 41 m and Spillway height is about 23 m. VPCOE Staff with Er. Prakash Gaikwad Er. Prakash Gaikwad Explaining Dam features and operations to students Students at the entry of Dam Site. After seeing all operations of Dam, we moved to Wai for Lunch. Er Prakash Gaikwad Sir and his team has made good arrangement of Lunch for all of us in Wai. Then at the end we visited Mahaganpati and Menavali Ghat for some time before starting backward journey. Students and Staff at Menavali Ghat on Krushna River near Wai Students at Menavali Ghat on Krushna River near Wai Then at 6 pm we left Wai to reach back to our VPCOE Campus. We reached in Campus at 8.45 pm. Regarding the visit students were extremely thankful to honorable principal Prof. Dr. S.B Deosarkar, Er. Suren Hiray (The Executive Engineer, Dhom Balkawadi Project Division.Wai, Dist:- Satara, Er. Pravin Ghorpade (Engineer from Irrigation Dept), Er Prakash Gaikwad from Dhom-Balkawadi Dam Site), HOD Civil engineering department Prof. G. N Narule, Prof. Dilip G Patil & Prof. Ms. S. B. Walke, Mr. Vinit Thombare, Mr. Kiran Taware and student coordinators of visit. List of Staff Members who visited Dhom- Balkawadi Dam Project: 1 2 3 4 Prof. Dilip. G. Patil Prof. Ms. S. B. Walke Mr. Vinit Thombare Mr. Kiran Taware List of Students who visited Dhom- Balkawadi Dam Project: S. S. Roll Roll Name No. No. N. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 1335002 1335003 1335004 1335005 1335006 1335007 1335008 1335009 1335010 1335011 1335012 1335014 1335015 1335016 1335017 1335019 1335020 1335021 1335023 1335024 1335025 1335026 1335027 1335028 1335029 1335030 1335031 1335034 1335035 1335036 1335037 1335038 1335039 1335040 1335041 Ahire Ajay Santosh Alte Rohini Subhash Bamane Eshwar R Bhagat Tushar Ashok Bhakare Sonal Nandkumar Bobade Abhijit Uttam Bombatkar Anup Gajanan Borkar Dnyaneshwar C Chandgude Suraj Sopan Charpe Mrunmayee D Chate Nitin Hariram Chinage Amit Ramesh Degave Dhananjay D Desai Priyanka Dipak Deshmukh Vivek Nishikant Divate Rohan Shivaji Gadade Vikram Bhausaheb Gavit Priyanka Ratilal Ghate Aarti Suresh Ghodake Vaibhav V Ghodke Yogesh Sambhaji Ghosalkar Aniket Pramod Idhate Mahendra Balu Ingle Shubhangi Shailesh Jadhav Gaurav Madan Jadhav Sagar Balaji Jagtap Aparna Prakash Kakade Rahul Rajendra Kakade Vishal Dhananjay Kaldate Abhijit Sunil Kale Mahadeo Tukaram Kamble Mangesh Maruti Kamble Vishal Vishwanath Kapse Praveen Ram Kasar Aboli Duryodhan 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 1335042 1335043 1335044 1335045 1335046 1335047 1335048 1335049 1335051 1335053 1335054 1335055 1335056 1335057 1335059 1335060 1335061 1335062 1335063 1335065 1335066 1335067 1335068 1335069 1335070 1335072 1335073 1335075 1335076 1335078 1335079 1335080 1335082 1335083 1335084 1335085 Name Kasnale Shweta Ashok Khalate Bharat Sudam Khalate Suvarna Bhanudas Khanwilkar Aditya S Khanwilkar Vikram S Kharjul Amol Bhagwan Kudale Chaitanya Mukund Lad Akash Vasant Magar Suyog Rajendra Manmath Baswraj Swami Masal Ramesh Yashawant Maske Subodh Bharatrao Maske Umesh Aniruddha Modake Rupesh Laxman Nagpure Akshay Mohanrao Nale Sagar Maruti Narode Sharad Balasaheb Nigade Ajinkya Balkrushna Pande Pramod Narsingrao Pawar Amruta Alias Padma A Pawar Dayanand Baburao Pawar Kishor Sudam Pawar Prathamesh Vikas Pawar Vaibhav Maruti Pharate Akash Balasaheb Pramod Pandit Shinde Pund Jaydeep Rajnikant Salunke Ganesh Bhagwat Sathe Snehal Hanumant Shaikh Amreentabassum K Shinde Amarsinh Shankar Shingate Swapnil Hanumant Sweta Suresh Koli Thalpate Abhijit Sanjay Waikar Amit Sanjay Waldode Nagesh Rajshekhar