Heat recovery with heat pumps: Manufacturer of electrical installations accelerates decarbonisation
A leading manufacturer of electrical installations in residential, industrial and commercial properties is actively driving forward the energy transition: with industrial heat pumps from ENGIE Refrigeration, the company uses waste heat from the chillers for heating. The tailor-made concept shows how heat recovery with heat pumps measurably accelerates decarbonisation in companies.
Industry:
Manufacturing industry- Two SPECTRUM Water heat pumps with a heating capacity of 500 kilowatts each, use energy from the cooling water basin to provide heating all year round with a cooling medium outlet temperature of 65 degrees Celsius.
- Two thermeco2high-temperature heat pumps with a heat output of 126 kilowatts each raise the waste heat from process cooling systems to a high temperature of 85 degrees Celsius and supply it directly into the heating network.
Many manufacturing companies are familiar with the situation: cooling systems run at full speed to supply processes and equipment with cold air – and the resulting waste heat is lost to the environment without being used. At the same time, gas is burned to heat the sites instead of using renewable energy sources. The declared goal was to break this cycle. Through energy-efficient renovation, the electrical engineering manufacturer is making intelligent use of the existing waste heat by means of heat recovery via heat pumps, thereby accelerating the decarbonisation of the company. The technical challenge was to ensure an evaporator outlet temperature of 25 degrees Celsius, but not using the classic admixture with a three-way refrigerant control valve. Instead, the chilled water volume flow is precisely controlled by means of a two-way line control valve. This solution required precise calculations and guarantees high efficiency across all performance ranges.
Decarbonisation of companies through intelligent energy use
ENGIE Refrigeration developed a sophisticated concept that taps into both heat sources: SPECTRUM water heat pumps cool the cooling water from 30 or 19 degrees Celsius to 25 or 16 degrees Celsius, depending on the season, and raise the energy recovered to a flow temperature of 65 degrees Celsius. The thermeco2high-temperature heat pumps further optimise energy use: they utilise the waste heat from the process cooling systems and bring it to an outlet temperature of 85 degrees Celsius. The results are impressive: gas consumption is significantly reduced, heating costs are lowered – and at the same time, the cooling side benefits from reduced electricity and maintenance costs. Heat recovery with industrial heat pumps turns unused waste heat into valuable heating energy, thus accelerating decarbonisation within the company. And that's just the beginning: the project is part of a comprehensive energy-efficient refurbishment of several production sites. Further similar projects are already in the planning stage – a strong signal for the future viability of this forward-looking solution.
Further references
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