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Renewable Energy for URBAN,
______INDUSTRIAL & COMMERCIAL APPLICATIONS
5

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


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Introduction l Overview l Grid-Interactive and Off-Grid Renewable Power l Renewable Energy for Rural Applications l Renewable Energy for Urban, Industrial and Commercial Applications l Research, Design & Development in New and Renewable Energy l Renewable Energy Programmes in North Eastern Region l Support Programmes l Annexure I l Annexure II l Glimpses