Case Study: Recovering waste heat from Ammonia Chillers


Within the sweet realm of the ice cream industry, the cooling demands of production and storage are met by chillers, ensuring the quality and freshness of the final product. Yet, this very process generates a significant amount of waste heat that, if left unutilized, represents missed opportunities for cost savings and environmental stewardship.


An exemplary case in North India demonstrates the transformative power of waste heat recovery in an ice cream plant. A heat recovery system was strategically designed to harness the excess heat from the chillers, redirecting it to heat water from 30°C to 60°C.

This dual-purpose system not only ensured optimal cooling for the production line and storage but also contributed to a sustainable water-heating solution


The impact of this waste heat recovery installation was profound, reflecting a commitment to both economic prudence and environmental responsibility. The plant experienced an annual saving of 800 kiloliters of cooling water, mitigating evaporation losses. The environmental benefits were equally impressive, with a reduction of 400 tonnes of CO2 emissions per year. From a financial perspective, the plant achieved a significant cost-saving of Rs 45 lakhs annually in fuel costs.

This case study stands as a testament to the cost-effectiveness and environmental gains achievable through waste heat recovery from chillers in the ice cream industry.

Water Saved

Saves 800kl/year, minimizing evaporation losses and promoting responsible water use in ice cream production.

Reduction in CO2 Footprint

400 tonnes CO2 saved annually, a green initiative reducing environmental impact in North India’s ice cream industry

fast ROI

Rs 45 Lakhs/Annum saved, waste heat recovery proves cost-effective and environmentally responsible for the plant.

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    PROMETHEAN ENERGY designs and builds heat recovery and thermal energy solutions for industries and commercial units.

    With industries and commercial units having 50% of the total input energy released as waste energy, our solutions are designed to help you untap this waste energy.


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