5.1 In view of the
acute power shortage renewable energy for urban, industrial and commercial
applications assumes added significance. Solar energy and energy from
municipal, industrial and commercial wastes have been identified as thrust
areas. The following broad programmes are being implemented to mitigate
the power shortage problem:-
Solar thermal and photovoltaic devices and systems
Energy recovery from urban, industrial and commercial wastes
Bio-energy and co-generation in industry
SOLAR ENERGY FOR URBAN AREAS
5.2 Solar thermal systems/devices have already found ready acceptance for
a variety of decentralized applications in domestic, industrial and commercial
sectors, with solar water heating being the most widely accepted of them
all. Further, solar steam generating and air heating systems and energy
efficient solar buildings are also attracting attention in urban and industrial
areas. Among solar photovoltaic technologies, some devices/ systems such
as solar street lights, traffic signals, road studs, street light control
systems, hoardings, power packs, building integrated photovoltaics etc.,
serve as technology demonstrators. Akshay Urja Shops play an important
role in on-the-spot sale and repair cum-service of renewable energy products.
Solar Thermal Energy Programme
5.3 The main objective of the solar thermal energy programme for urban
areas is to promote the widespread deployment of solar water heaters in
domestic, industrial & commercial sectors; solar air heating and steam
generating systems in the institutional & industrial sectors and solar
passive techniques in building designs, through a combination of financial,
fiscal and promotional incentives. Consequently, resultant savings of conventional
fuels, especially electricity and furnace oil/diesel, are enormous. This
apart, solar thermal deployment facilitates peak load shaving.
Solar water heating systems
5.4 Solar water heaters are generally viable in areas where hot water requirement
is there for at least six months in a year. A domestic solar water heater
of 100 litres per day capacity has the potential to save electricity upto
1500 kWh/annum and pay back its cost in 3-4 years through conservation
of electricity. An industrial solar water heater of 100 litres/day capacity
can save around 120 litres/annum of furnace oil through pre-heating. Hot
water requirements in industrial and commercial sectors are generally throughout
the year and solar water heaters installed in these sectors have a pay-back
period of 5 to 6 years through conservation of diesel.
5.5 Systems based on flat plat collectors (FPC) have been promoted in the
country for the past 25 years. There are 60 BIS approved flat plat collector
system manufacturers. The useful life of these systems is 15 to 20 years.
Evacuated tube collector (ETC) systems have been promoted for the last
few years only. The technology of these systems is yet to be indigenized.
23 suppliers of such systems have been approved.
5.6 During 2006-07, the aim to install 0.6 million sq. m of collector area
is likely to be achieved. Subsidised loans have been made available to
users through various banks/financial institutions including private, public
and co-operative banks and IREDA.
5.7 As beneficiaries in industrial and institutional sectors, especially
hotels, hospitals, students’ hostels, guest houses and industry did
not wish to avail loans for solar water heating systems, capital subsidy