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Turning to the Sun

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For multitude of reasons, it is time we look at solar energy to solve our energy crises.

Sunlight, the supreme source of energy, is abundantly available in a tropical country like India. As an educated and aware generation we should self-willingly make it mandatory for ourselves to use the available solar energy wherever and whenever possible. An efficient and technologically superior solar water heating system can not only save on the electricity/gas bills substantially, but can also largely contribute on reducing the carbon footprint says,”Kunal Chandra, Executive Director, Twincity Sunlife Pvt. Ltd. (TSPL)

India with 17% of the world population and just 0.8% of the world’s known oil and natural gas resources, is going to face serious energy challenges in the coming decades. There are three imperatives that necessitate a transition to a sustainable energy system in the 21st century:

  • Climate change and its potentially disastrous consequences,
  • Peaking of production, depletion/extinction of fossil fuels and
  • Energy Autonomy/Independence.

India’s present growth rate can’t be sustained without energy security. Consider India’s solar energy potential: India’s untapped solar energy is equal to 500 trillion kW per annum. If even one per cent of our land is utilized for solar energy we could get 1,000 Gigawatts of electricity.

TSPL believes in and supports the emerging global consensus that the international community needs to pursue a low carbon path and to leave a healthier planet for the future. TSPL, Mumbai’s leading solution provider in the Solar Energy sector has expertise in executing turn-key projects using Solar Thermal and Photovoltaic technology.

“Mumbai, being the biggest market for TSPL, our large list of esteemed clients include Bhabha Atomic Reasearch Centre (BARC), Gas Authority of India Limited (GAIL), Municipal Corporation of Greater Mumbai (MCGM), Mahavitaran (MSEB), Tata Consultancy Services (TCS), Times Group, Associated Capsules Group (ACG), Peninsula Land Limited, Hiranandani Developers Limited and many more. Recently, TSPL has also bagged the single largest Solar Energy project in Mumbai region to install Solar Water Heaters in various hospitals across suburban Mumbai. With a highly qualified team of engineers and a pan India presence, we are now successfully executing projects even in the remotest part of the country,” adds Chandra.

One of the landmark projects executed by TSPL is installation of A 6,000LPD capacity solar water heating system on top of India’s second tallest building, Ashoka Towers, Parel, for Peninsula Land Limited. One of the many challenges posed by this project was the lack of space on the terrace level to install the solar collectors. TSPL’s design team stepped in and decided to take the challenge and go one level higher and installing the collectors on top of its cold water tank at a height of 200m from ground level.

“Our technical team, using state-of-the-art safety equipment overcame challenges of extreme height and high wind speeds to commission the system on schedule. Peninsula Land Limited being highly impressed with our work have now made us exclusive vendors for renewable energy solutions for all their projects across India. Besides this, repeat orders from Tata Consultancy Services, GAIL and Associated Capsules Group reiterate the fact that our systems have lived true to expectations.”

For the first time, a 6000LPD solar water heating system is being installed at DHRUVA Reactor inside BARC, Trombay, by TSPL.

TSPL is the first company to introduce Vacuum Tube Technology for commercial and domestic applications in India and has remained at the forefront of research and technological advancement of the solar water heaters. The company has recently designed and developed Space Optimized Multilevel Collectors (SOM) and Zero Carbon Water heating systems. SOM collectors occupy lesser space and can heat large volumes of water, compared to conventionally designed solar water heaters/collectors. Says Kunal Chandra, “The new design has been tried and tested in international markets and after its success even in cold climates, we are happy to finally launch these tried and tested systems in the Indian market. This is a very significant development as in most of the new high rise commercial and residential projects, the amount of terrace space available is very limited as compared to the volume of hot water required in the towers/ buildings.”

This new development enables TSPL deliver approx. 7.5 litres per day (LPD) of hot water @ 65°C/sqft (unit area) as compared to less than 5LPD from equal area using conventional Evacuated Tube Collector Design and even lesser hot water from Flat Plate Collectors. Unfortunately, India still uses Flat Plate technology in most places. The main reason being the lack of awareness of massive advancement in technology and fly-by-night operators/small manufacturing set-ups misguiding the general public.

Zero carbon solar water heating systems are powered by solar electric (Solar Photovoltaic or PV) pumps. These typically use a PV panel which faces in the same direction as the main solar thermal heating panel and a small, low power diaphragm pump or centrifugal pumps to circulate the water in collectors. This product is ideal for locations which face long hours of power cuts (especially during the day time).

TSPL products being highly efficient and technologically miles ahead, also help save on electricity bills substantially. A simple explanation can be given in terms that the hot water output from a 3kW geyser running daily for three hours, if switched to TSPL’s highly efficient ETC collectors would save up to `2430 per month. TSPL systems also help reduce the payback period considerably, once after that, the cost incurred is almost free.

“So, clean energy should not be perceived simply as a cost. It should be seen as an opportunity to invest in a different future… an opportunity to diversify our energy sources and expenditures.”

Capital Subsidy from Central Govt.

To Institutions & Commercial Establishments that do not avail soft loans @ INR 1,750/- per sqm of collector area (for non-profit making) & INR 1,400/- per sqm (for profit making)

To builders & Developers for systems above 2,500 LPD capacity @ 1,900/- per sqm (for housing complexes), @ 1,750/- per sqm (for Institutional Buildings), @ INR 1,400/- per sqm (for Commercial buildings).

Soft Loans are available through nationalized banks @ 2% interest for domestic users, @ 3% for institutional users, @ 5% for industrial/commercial users. Loans available upto 80% of the system/project cost as per MNRE rate chart.

Accelerated Depreciation benefit: Users can claim 80% depreciation of the project/product value in the first year & 20% in the second year.


Yearly, one 100LPD solar water heating system can SAVE:

  • 300kg of Coal
  • 1,500 Electrical units
  • 182kg of Gas
  • 678kg of CO2 Emission

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