Page 32 - HUDCO BEST PRACTICE AWARDS

EnvironmEntal managEmEnt, EnErgy ConsErvation and grEEn Building

Process of rain water harvesting Creation of Dug-well

Year 2012-13

uSE of PASSiVE tEcHnoLogiES for Energy conservation by crEDA

and chhattisgarh Housing Board

hhattisgarh State Renewable Energy Development Agency (CREDA) along with The building design reduced cumulative energy expenditure to the tune of about 45% with
CChhattisgarh Housing Board took up the mission to erect energy efficient building respect to any general office building in summer and about 15% in winner though strategic
– CSERC office building in the State of Chhattisgarh. The building was conceived total design confirming relevant principles of solar passive technology.
number of 3 floors - the 1st floor accommodated Chhattisgarh State Electricity Regulatory
Commission (CSERC) and the 2nd floor accommodated Chhattisgarh State Renewable With the above, the final gross EP came down to about 50 kWh/smt/annum and more
Energy Development Agency (CREDA). The floor area of CSERC office building was 2072.5 than 60% of gross carpet area was conditioned/cooled. After 80 kW SPV power plant
sqmt. It consisted of 80 kW Solar Photovoltaic (SPV) Power Plant situated on the Ground installation, the net EPI came down to (-) 15.87 kW/sqmt/annum. During that time, CSERC
floor. The power consumption of the building from August 2011 to July 2012 was noted building was the 1st Net Energy Plus building of the country. Furthermore, it was awarded
and observed that the power generated from SPV plant during the period was 86308 kWh 5 Star rating by Bureau of Energy Efficiency (BEE) (Govt. of India, Ministry of Power) for
whereas power import from Chhattisgarh State Electricity Board grid was 53416 kWh. being the most energy efficient building in the State of Chhattisgarh.
Hence, export of surplus power was 323892 kWh against actual figure of 33897 KWh.
Hence, net Energy Performance Index (EPI) was (-) 15.87 kWh/sqmt/annum. However, the
gross EPI was 50.85 kWh/sqmt/annum with gross consumption of 105826 kWh where
more than 70% of gross carpet area was conditioned/completed.

Since Chattisgarh State enjoyed maximum number of sunny days annually and keeping
this in the view, the orientation and volume of the building was conceived by formulating
VOC analysis. The orientation of the building was designed as North-South. Solar umbrellas
were provided with an inclination of 78 deg from the ground which shaded the outer walls. 3
layers of walls with cavities in between were provided to reduce the U-factor. Air conditioned
and non-air conditioned spaces, which eventually turned in to explorative cooled areas were
distributed effectively. Evaporative ductable cooling facility for cooling non-AC spaces,
walls and roof insulation was provided in the design. Internal sensitive fibers were carefully
shaded to reduce heat gains. Based on the above, maximum internal illumination load Exterior view of the green building
comes about 3.00 kW against total maximum connected load of 100 kW.

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