Uttarakhand Renewable Energy Development Agency

Solar Water Heater

Solar Water Heater

Solar Water Heating Systems

Introduction

Solar water heater consists of a collector to collect solar energy and an insulated storage tank to store water. The solar energy incident on the absorber panel coated with selected coating transfers the heat to the riser pipes underneath the absorber panel. The water passing through the risers get heated up and are delivered to the storage tank.

The recirculation of the same water through absorber panel in the collector raises the temperature upto 68ºc + 5 ºc on a good sunny day. The total system with solar collector, storage tank and pipelines is called solar hot water system.

Based on the collector system, solar water heaters can be of two types:

Flat Plate Collectors (FPC) based Solar water heater where radiation is absorbed by Flat plate collectors which consists of an insulated outer metallic box covered on the top with glass sheet. Inside there is blackened metallic absorber with built in channels or riser tubes to carry the water. The absorber absorbs the solar radiation and transfers the heat to the flowing water.
Evacuated Tube Collectors (ETC) based Solar Water Heaters is made of double layer borosilicate glass tubes evacuated for providing insulation. The outer wall of the inner tube is coated with selective absorbing material. This helps absorption of solar radiation and transfers the heat to the water which flows through the inner tube.

Solar water heater is being used for heating water in homes, factories and other commercial and institutional establishments. It has life of 15-20 years.

By use of solar water heater of 100 litres capacity results in annual savings of app. 1250 units of electricity.

At present there is no any subsidy is admissible on Solar Water Heating Systems. UPCL provides rebate of Rs. 100/- per month for 100 LPD Solar Water Heating System on electricity bills to consumers.

Below mentioned bar graph shows the yearwise installation of solar water heater and cumulative installation of solar water heater till date from FY 2010-11 onwards.

Detail of Year Wise Solar Water Heating Systems Installation in Uttarakhand

S.No.	Year	Capacity Installed in LPD	App. Area in Sq. Mtr.
1	1986-87	30200	604
2	1988-89	9600	192
3	1989-90	10900	218
4	1990-91	1700	34
5	1991-92	6700	134
6	1992-93	9500	190
7	1993-94	1700	34
8	1994-95	191400	3828
9	1995-96	1000	20
10	1996-97	1000	20
11	1997-98	2300	46
12	1998-99	6800	136
13	1999-2000	6900	138
14	2000-2001	8000	160
15	2003-04	13700	274
16	2004-05	12500	250
17	2005-06	42000	780
18	2006-07	68100	1222
19	2007-08	41400	771
20	2008-09	151200	3024
21	2009-10	193600	3372
22	2010-11	167425	2999
23	2011-12	316575	5224
24	2012-13	520300	8152
25	2013-14	520000	8211
26	2014-15	462000	7090
27	2015-16	503750	7575
		3300250	54698

The Jawaharlal Nehru National Solar Mission (JNNSM)-one of the eight missions under National Action Plan on Climate Change was launched by the Prime Minister on 11^th January 2010, which is a measure initiative of government of India and state govt. to promote ecological sustainable growth while addressing India’s energy security challenge. To promote off grid applications of Solar energy (both SPV & Solar Thermal) for meeting the target set in JNNSM, UREDA has installed a various capacity Solar Water Heating System under JNNSM. The categorize benchmark has been finalized by MNRE for 2013-14 is as below.

SI NO	Type of System	Category	Previous year benchmark cost Per sqm for 2012-13 (Rs/sqm )	New benchmark cost Per sqm for 2013-14 (Rs/sqm )
1.	Evacuated Tube Collectors (ETC)	Domestic	10000	8500
1.	Evacuated Tube Collectors (ETC)	Commercial	10000	8000
2.	Flat Plate Collectors (FPT)	Domestic	11000	11000
2.	Flat Plate Collectors (FPT)	Commercial	10000	10000

List of Schools for Installation of Solar Water Heating Systems (2019-20)

Group-A

Sl.No.	District	Name of School	Proposed Capacity (In LPD)
1	Haridwar	K.G.B.V., Harjoli, Narsan	500
		Boys Hostel, Laldhang, Bahadarabad	1000
		Boys Hostel, Alipur, Bahadarabad	1000
		K.G.B.V., Ranimajra, Bahadarabad	500
		Girls Hostel, Bandiwala, Bhagwanpur	1000
		Girls Hostel, Gobardhanpur, Khanpur	1000
2	Udham Singh Nagar	Girls Hostel, Bajpur	1500
2	Udham Singh Nagar	K.G.B.V., Sitarganj	1500
3	Dehradun	Girls Hostel, Kalsi	2000
		Girls Hostel, Tyuni	2000
		Special Residential Hostel, Rajpur Road	2000
		Special Residential Hostel, Nabha House, Rishikesh	1000
4	Nainital	K.G.B.V., Khansyu, Okhalkanda	3000 (2X1500)

Group-B

Sl.No.	District	Name of School	Proposed Capacity (In LPD)
1	Champawat	K.G.B.V., Tanakpur	1000
2	Almora	K.G.B.V., Chagethi, Dhouladevi	2000
		K.G.B.V., Jaiti, Lamgada	2000
		Rajeev Gandhi Navodaya Vidyalaya, Chounaliya, Bhikiyasen	4000 (2X2000)
3	Tehri	Girls Hostel, Aampata, Narendranagar	2300 (1X2000) (1X300)
		Girls Hostel, Routu Ki Veli, Jonpur	2300 (1X2000) (1X300)
		Girls Hostel, Koshal, Tholdhar	2300 (1X2000) (1X300)
		Girls Hostel, Akhodi, Bhilangana	2300 (1X2000) (1X300)
		Girls Hostel, Sujadgaon, Pratapnagar	2300 (1X2000) (1X300)

Group-C

Sl.No.	District	Name of School	Proposed Capacity (In LPD)
1	Chamoli	K.G.B.V.	2000
2	Pithoragarh	K.G.B.V. Dasaithal	2000
2	Pithoragarh	Rajeev Gandhi Navodaya Vidyalaya, Gangolihat	2000
3	Uttarkashi	-	-

Group-D

Sl.No.	District	Name of School	Proposed Capacity (In LPD)
1	Bageshwar	-	-
2	Pauri	K.G.B.V.	6000 (2X3000)
3	Rudraprayag	-	-