Objectives
U.P. Twiga Fiberglass Limited (UPTFL) is engaged in the production and marketing of glass wool and enjoys the highest market share in this segment. It currently produces approximately 5,000 MT of glass wool and has an annual sales turnover of Rs. 70 crores.

The objective of conducting energy audit at the UPTFL building was to quantify and ascertain the overall energy saving potential of glass wool (as insulation material for buildings) produced by UPTFL. The proposed audit also aimed to identify measures that helped reduce energy consumption in lighting systems.

Activities
Over these twelve months, the following activities were carried out for accomplishing the objective of the proposed project:

• Estimation of baseline energy consumption (before insulation) of the selected buildings
• Estimation of energy consumption of the building after insulation of the roof and then with roof and exposed walls both insulated
• Assessment of overall energy saving potential with glass wool insulation
• Identification of measures for reducing the lighting energy consumption

Project Status
Winrock International India conducted the assessment study for the impact of glass wool insulation being manufactured by UP Twiga Fibreglass Ltd., on the energy consumption of air-conditioned space for the summer, monsoon as well as for the winter season. The summer season study was carried out in June-July 2006, the monsoon season study in August-September 2006 and the winter season study was carried out during the second week of January 2007. Test conditions were set-up & energy consumption recorded for establishing the baseline, as well as after insulating the roof & then the walls exposed to the sun along-with roof insulation. For the summer season, the actual energy savings with insulation on the roof were in the range from 15% to 35% as compared to the baseline energy consumption & with insulation on the walls, exposed to the sun, there were additional savings ranging from 6% to 28%. During the monsoon season, the worst case scenario yielded energy savings ranging from 7% to 10%. For the winter season, the savings ranged from 12 to 20% for the roof insulation alone, whereas with both roof as well as wall insulation, the savings were in the range of 20 – 30%. The overall summary is presented in the table below: -

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The annualized average results are tabulated in the table below: -

Conclusions

Few definite conclusions can be drawn out of the study. These conclusions are presented below: -

• There are definite savings with the insulation throughout the year.
• The quantum of savings varies according to the season.
• The savings are more with roof as also the exposed walls insulated.
• The potential savings are proportionately not that high with roof and exposed wall insulation as compared with roof insulation alone.

The impact of exposed wall insulation is better in room where two walls are exposed as compared to rooms with single wall exposed to sunlight.