Heat recovery from refrigeration plants

5. Mar 2019

Due to the high amount of total electricity consumption, heat recovery (HR) from refrigeration equipment is an underestimated topic with high savings potential.

The use of an air-cooled condenser next to a boiler within a production plant shows the need for action. While one system consumes electricity and leaves waste heat unused, the heating system burns fossil fuels to generate the desired heat. In such a constellation, a heat recovery system can often be retrofitted or included in future planning. A well conceived planning of the heat recovery system ensures an improved efficiency of the refrigeration plant and supplies the heat “incidentally”, so that the operator benefits twice.

We are happy to check on a case-by-case basis whether a heat recovery system for a specific system in a building can be implemented in an energy-efficient and investment-sustainable manner. There are various implementation variants that can be implemented more or less sensibly depending on the existing structure. In addition to the selection of a direct or indirect system, other factors such as the size of the storage tank to be used, the integration of the heat exchanger into the existing system, its design and the choice of materials for the service water all play a decisive role.

In addition to the obvious use for heating domestic hot water, in many cases systems for heating support and for heating fermenting rooms etc. can also be implemented. We have already implemented a large number of heat recovery systems on existing and new refrigeration systems and can draw on a wealth of experience. We will also find a solution for your unusual ideas. For example, we were able to implement the request of a customer to keep the walking and parking area of his premises ice-free by using the waste heat in winter.

If you are interested in a cost-neutral consultation, please contact us.

Functionality and historical development of our contact cooling system

As early as the 1970s, Eisvoigt developed systems for the special requirements of bakery cooling and refrigeration technology. They were equipped with so-called silent cooling. This technology achieved the best results for unbaked doughs and cream cakes. Due to large cooling surfaces, with respect to the individual cooling capacity, the dehumidification of the product could be significantly reduced. In addition, there were no fans in the room: the main cause of dough dehumidification is air movement above the product and a large difference between the room temperature and the temperature of the cooler surface.

NH₃ / CO₂ Process technology

Refrigerants NH₃ and CO₂ are increasingly used in the bakery industry. Mostly used as refrigerants for central systems, they supply the entire company with all the refrigeration points. We have taken this development into account in recent years. At present, we can also supply all our systems optionally equipped for use with these refrigerants.

Constructions of this type, e.g. shock freezers of 400 – 800 kW cooling capacity, industrial fermenters, stiffening rooms and many other systems have already been realised by us.

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