DE2853944A1 - HEAT RECOVERY PLANT - Google Patents

Description

Eureka-Kühlanlagen GmbH & Co., Nickelweg 5, 4407 Emsdetten

"Heat recovery system"

The invention relates to a heat recovery system for refrigeration systems with an evaporator and refrigeration unit, as is customary in farms for cooling milk or in larger food factories for cooling Meat, poultry and other goods are used.

In the previously known facilities, the inevitably occurring Cooling heat is blown away by the cooling machine's fans, which on the one hand loses valuable energy, on the other hand environmental pollution occurs. So far it has not been possible to use these relatively small amounts of heat economically recycle.

Heat recovery systems have also become known which work with a heat exchanger which is arranged in a water tank is. The heat exchanger transfers the heat to the water contained in the water tank, so that it heats up slowly of the water tank takes place. If the water in the water tank has reached a higher temperature, the efficiency is the The system is worse, i.e. in extreme terms, when the water in the water tank has the same temperature as the heat in the compressor

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030025/03 82

has reached, there is no more heat exchange and the residual heat must be dissipated via the air condensers known per se will. Such systems do not work sensibly either.

The invention is based on the object of a heat recovery system to create, with the cooling heat to the limit of the theoretically possible and thus otherwise lost energy sensible can be recovered.

This object on which the invention is based is achieved in that a countercurrent condenser is attached to the compressor of the refrigeration unit which is fed from the normal water pipe, whereby the refrigerant coming from the compressor is cooled the system is returned and the heated water flows to a water storage tank in its upper area, which is in his the lower area is connected to the normal water pipe.

According to the invention it is further provided that the water storage tank is equipped with an additional heater.

The counterflow condenser circuit formed in this way can, according to a further feature of the invention, from the main system as required. and switched off, the procedure preferably being such that this countercurrent condenser circuit and the water storage tank are combined in a compact system, which can also be connected to existing systems in the simplest way.

030025/0382

Finally, it is provided according to the invention that the countercurrent condenser is outside the water storage tank and that the water introduced into the countercurrent condenser is normal Water pipe is discharged directly into the storage tank.

With this heat recovery system, it is possible to get hot water of around 60 ° C shortly after the start of cooling, Depending on the size of the refrigeration machine, temperatures of up to 70 ° C can be achieved. Despite this At high water temperatures, the compression pressures of the chiller remain normal. By a thermodynamic countercurrent process the hot water from the condenser is fed separately into the water storage tank, so that hot water is already produced, if only small amounts are cooled.

Another advantage of this system must be seen in the fact that the condenser is always cooled with fresh cold water, which results in better cooling times and no energy is dissipated via the fan. By using one preferably electrically operated auxiliary heating, it is possible to control the water temperature achieved higher, so that, for example hot water is available for cleaning purposes.

Of course, appropriate thermostat sensors, check valves, safety devices, etc. are provided, which make the corresponding control of the entire working group safe and simple and as automatic as possible.

Q30025 / 0382

An embodiment of the invention is based on the following a schematic diagram.

In this schematic sketch, a compressor operated by an electric motor 2 is shown at 1, and that of the evaporator 3 is liquid is fed. In the expansion area 4, the expansion of the refrigerant takes place, which is supplied at 5, the normal Circuit has a line 6, which leads to an air-cooled condenser 7, which is driven by an electrically operated fan 8 is cooled.

The heat recovery system according to the invention can be seen schematically at 9 and consists of a counterflow condenser 10, which connects at 11 to the line of the compressed refrigerant and at 12 is fed with water from the normal water pipe. The water supplied at 12 flows through the countercurrent condenser and enters a water storage tank 14, specifically in its upper area, this water storage tank 14 in its lower area, as can be seen at 15, is also exposed to the normal pressure of the water pipe. At 16 it is additional electrical heating for the water storage tank recognizable and at 17 the heated water is drawn from the water storage tank deducted. The separation between the hot water area and the cold water area in the water storage tank 14 is thermodynamic, i.e. there is no partition here. The dashed line provided in the drawing in the dividing area between hot water and cold water

"Ö30025 / 0382

water is only drawn in to make the boundary clearer and is not designed that way in reality.

The valve means which enable the heat recovery system 9 to be connected to the conventional refrigeration system are shown in the drawing shown only schematically and it goes without saying that further thermostat controls, such as can be seen at 18, can be provided on the water storage tank.

Q30025 / 0382

e r s e i t

Claims (6)

Claims; Heat recovery system for cooling systems with evaporator and refrigeration unit, characterized / that the compressor (1) of the refrigeration unit is connected to a countercurrent condenser (10) which is fed from the normal water line (12), whereby the refrigerant coming from the compressor (1) is cooled and the System is returned and the heated water a water storage tank (14) in its upper 030025/0382 Area flows in, which is connected in its lower area to the normal water pipe (12). 2. Heat recovery system according to claim 1, characterized in that the water storage tank (14) is equipped with an additional heater (16). 3. Heat recovery system according to claim 1 and 2, characterized in that the countercurrent condenser circuit can be switched on and off as desired from the main system. 4. Heat recovery system according to claims 1 to 3, characterized in that the countercurrent condenser (10) and the water storage tank (14) are combined in a compact system. are. 5. Heat recovery system according to one or more of the preceding claims, characterized in that the countercurrent condenser (10) is located outside the water storage tank (14). 6. Heat recovery system according to one or more of the preceding claims, characterized in that the countercurrent condenser is connected directly to the water line and the heated water of the countercurrent condenser (10) in the water storage tank (14) is delivered. 030025/0382