Go to content

Grocery store: heat recovery by condensers

Energy
Commerce
Agriculture, viticulture
[ Detailed version of the measure ]
Last update: 10/09/2024
  • Possibility of assistance
  • Subsidies available

To make this measure more effective and tailored to the specific context of your company, we recommend that you first perform an overall analysis of your energy situation.

Heat recovery by condensers

The heat recovered from the condensers of the refrigeration units is used to heat domestic hot water. It is a refrigeration cycle that works by drawing heat from the evaporator and discharging it to the outside (condenser). The idea behind the project involves recovering this waste heat to preheat domestic hot water (DHW).

This technology is suitable for food businesses with refrigeration units (cold rooms, refrigerated units, air conditioning, etc.).

By installing this technology, which has been available on the market for more than 5 years, the company can save on its electricity bills and reduce its carbon footprint. However, implementing this measure can be complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage

The exchanger is placed between the compressor and the condenser of the cooling unit. In practice, recovery can be implemented in three different ways:

  • External exchanger: an exchanger is connected on one side to the compressor outlet and on the other to the hot water tank (partial recovery)
  • Internal exchanger: a “desuperheater” through which the refrigerant flows is inserted at the bottom of the hot water tank upstream of the condenser
  • Condensation water collector: all the refrigerant is condensed inside the hot water tank (“total recovery”)       

Energy and environmental impact

The two joint positive effects are as follows:

  • Energy savings on DHW production because the energy evacuated to the outside is recovered (= waste heat).
  • Environmental benefits, as the final consumption for DHW production is lower than the initial consumption. It also has a positive impact on carbon footprint, especially if the DHW is initially produced using fossil fuels.

The estimated energy savings for DHW are almost 100%, as it is no longer necessary to purchase power. The impact on the carbon footprint will also vary in intensity depending on the initial method used to produce domestic hot water.

State subsidy application

State subsidies

Please note: any application for government or non-government subsidies must comply with the “incentive effect”, subject to compliance with the subsidy conditions.
To ensure that the ‘incentive effect’ is respected, no binding commitment (signing a quotation; paying an advance) may be made BEFORE submitting the application file or receiving the agreement in principle from the State or the electricity and natural gas supplier following an application for subsidies.

Temporary environmental impact aid

Extended “SME Packages Sustainability” aid scheme, to give companies greater incentives to invest in measures that significantly improve their environmental impact. Investments under this climate protection measure amount to 70% for small enterprises, 60% for medium-sized enterprises and 50% for large enterprises, for projects costing more than €7,500, with a maximum subsidy of €100,000.

SME Packages – Sustainability

Flat-rate subsidy of €5,000 for small and medium-sized companies for projects to reduce their environmental impact, costing between €25,000 and €6,650 excluding VAT.

Environmental protection scheme – Investment aid for the protection of the environment

  • Verification of company eligibility and costs: General Directorate for Industry, new Technology and Research
    • Support in drawing up the subsidy application file prior to submission to the Ministry of the Economy

N.B. State subsidies cannot be combined for the same project

Subsidies from electricity and natural gas suppliers

Since 2015, natural gas and electricity suppliers are required to make energy savings for consumers under the obligation scheme. Since then, energy suppliers have been offering support and advice, as well as subsidy programmes for consumers to implement energy efficiency measures.

The following suppliers offer this service for companies:

N.B. Supplier subsidies can be combined with any state subsidies for the same project.

Implementation aid

Contact us

I would like more information on:

  • Fit 4 Sustainability
  • Government subsidies
  • Support
  • Identifying partners

I would like more information on:

  • Klimabonus subsidies or photovoltaic and electromobility subsidy programmes
  • A technical aspect of the measure
  • A specific tool
  • A technical aspect of the site (404 link, etc.)

Contact Klima-Agence