DD213278A1 - CIRCUIT ARRANGEMENT FOR ABBEER USE IN DECENTRALIZED WASTE SOURCES - Google Patents

Abstract

The invention relates to a circuit arrangement for Abwaermenutzung with decentralized Abwaermequellen such. Kleinkaelteanlagen. The object of the invention is to provide the technical and economic conditions for the use of the considerable heat emissions of small-scale systems. The inventive solution is that the use of Abwaerme the Kaeltekreise in conjunction with the Gebaeudeausrestung for space heating and hot water is achieved in that the heat demand carrier air heater, space heating, hot water via a pipe system with an Abwaemeanlage with the Verdichtersaetzen are connected such that the Heat supply is regulated if necessary by means of control valves.

Description

Claus

Friedrich

Shiver, Horst

Zustellungsbevollmächtigt

VEB machine and apparatus construction Sehfceuditz BfN / property rights

7144 Schkeuditz, Kurt-Beyer-Straße 10/12

of the invention

Circuit arrangement for waste heat recovery with decentralized waste heat

Field of application of the invention

The invention relates to a circuit arrangement for waste heat utilization in decentralized waste heat sources, such as small refrigeration systems aur improved energy economy, preferably in refrigeration systems of the retail, hotel and restaurant industry, for industrial kitchens and for industry and research, where technologically conditioned cooling of production is necessary.

Charak t Eristik the tonnten be technical solutions

In the case of the refrigeration systems used predominantly for food cooling, heat is generated during operation on the Yerdichtersatz, which is used to maintain the

2HJAi11933 * 063534

Refrigeration must be dissipated. Several compressor sets of different performance sizes are usually placed in a common engine room and with the technology; connected to the condensation heat dissipation «

The dissipation of the condenser heat takes place by means of! Fresh water cooling, water cooling with Hückkühlsystem or by air cooling. At the same time, the operation of heat generators for functional and social needs is necessary.

Methods of Wärmerüc ^ recovery in small refrigeration systems are known in the case of water cooling systems with Sücfckühlturm an additional recuperator is interposed in order to use the heated cooling water for heating purposes. The disadvantage here is the use of standing with the ambient air in exchange cooling tower cycle to see. Only by means of intensive maintenance measures can this system, including the recuperator, be kept in good working order or in the longer term.

For the use of waste heat in the compressor sets equipped with air-cooled condensers, the continued use of heated refrigerating machine room air is conceived as described, for example, in more detail in the patent document DDH WP 150.106 P 25 B 29/00.

This method is disadvantageous in that air is used as the heat carrier, which can be used only during the heating season for space heating, but not for hot water during the maximum heat in the summer.

Further, hygienic concerns arise when using engine room air for heating lounges. moreover, there is no practicable solution for heat storage with air, so that optimal energy use is only possible with the simultaneous presence of heat demand and heat supply.

Object of the invention

The aim of the invention is to provide improved technical and economic conditions for the use of significant heat losses in KIein refrigeration systems.

The essence of the invention

The invention has for its object to develop a circuit arrangement that allows on the basis of proven Änlagen & onzeptionen with small refrigeration systems for refrigeration for various purposes an economic lehe use of the refrigeration process heat or »at least the Verflüssigerabwärme for heat carrier.

According to the invention the object is achieved in that the waste heat of Kälteioreise individual systems for the heat supply in conjunction with the technical building equipment for space heating and water heating is used. These are the heaters, consisting of air heaters, the space heating, the? / Armwasserbereitung, with a From heat plant and a memory via a piping system involving a circulating pump with the condensers and depending on equipment variant of the compressor set with the cooling jacket of the drive motors and cylinder heads of the compressor so connected that when heat demand one or more interposed in the piping system control valves regulate the heat supply to space heating and water heating.

Depending on the heating medium flow temperature, the two-way mixing valve is regulated. If the heat demand is greater than or equal to the heat supply, then this valve is in passage position, outweighs the supply of heating

with the result of a temperature rise in the heating medium flow, the valve moves in corner position, which passes through the lower storage tank .Wärmeträgerflüssig & eit to the air-cooled waste heat plant and is cooled according to the operating conditions for the compressor sets.

According to the temperature drop of the heat transfer medium, the two-way valve is again brought in the direction of passage position. The maximum power of the air-cooled waste heat plant is achieved by an adiabatic air supersaturation of the cooling air flow in the waste heat device, which then enters lunttion when the mixing valve is in Ecksteilung and the setpoint of the heat transfer medium is exceeded.

If the heat demand can not be covered by the resulting engine heat, additional heating systems must be put into operation as a post-heater. The requirement of SLn- or, elimination of additional heaters is dependent on the setpoint of the temperature in the ranges of action of the heaters ·

embodiment

The invention will be explained in more detail with reference to an embodiment.

Figut 1 shows the Prinζipschaltung individual Kältefcreise for different cooling points 7 and the WärmeträgerKreises in conjunction with an air heater 3 or also! Underfloor heating and the water heater 4, a memory and the waste heat plant. 6

To comply with the required air condition parameters, temperature and humidity at the cooling points 7, the disturbance variables (heat and material load) are compensated by the heat absorption at the evaporators 8.

The heat absorbed by the refrigerant in the evaporators 8 including the heat produced during the compression of the refrigerant is discharged at a higher temperature in the liquid s condenser 9 of the compressor set to the heat transfer medium circulating in the circuit 2 by means of the circulating pump 11 and the heat consumers 3 » 4-, δ supplied while maintaining a constant heat carrier inlet temperature. The integration of the memory 5 in the closed heat transfer system is used for compensation, associated with the misfire of the compressor sets 10 fluctuations in the supply of heat and installation options for a conventional heater 12, which falls below the minimum flow temperature for the heat consumer 3 and 4 in function.

To regulate a heat carrier temperature, which at the same time maintaining the operating conditions for the compressor sets 10 and the consumer 3 and 4 is sufficient, the mixing valve serves 13. If the heat demand is greater than or equal to the heat supply ι is dependent z.3. the storage inlet temperature or the heat carrier inlet temperature brought the mixing valve 13 in the passage position, so that the heat transfer medium circulating in the system, bypassing the waste heat system 6. Increases the heat carrier flow temperature above the desired setpoint with too low heating demand, then the mixing valve 13 goes from the passage position toward corner position, so that by the waste heat plant 6 due to the commissioning of the fan 14, a cooling of the Wärmeträgerme medium occurs

If the setpoint value for the heat carrier temperature is not reached by the dry air cooling, then the water spraying device 15 of the fan 14 is in puncture,

whereby the cooling capacity of the waste heat blower 6 increases.

In the case of .Wärmeabführung by the waste heat plant 6 when ordering the. In the mixing valve 13, the heat transfer fluid cooled by the consumers 3 and by the waste heat plant 6 is mixed and the pump 11 again supplies the Yerdichtersätze 10 for heat absorption fed.

Claims (4)

Brfindungsanspruch 1. Circuitry for waste heat recovery in decentralized waste heat sources such as small refrigeration systems or small heat pumps or to Sohlende processing machines and in conjunction with the building installation, since, characterized by ge kenn, that the waste heat of the condenser (9) of compressor sets (10) of individual refrigeration iron (1 ) is used for heat supply in the combined operation with the technical building installation for air heating (3) and water heating (4-) _s where the heat consumers (3)> (4 ·) and / or an ITiedertemperatur- *. - - heating via a closed pipeline system (2) with a waste heat plant (6), with the interposition of a circulation pump (11), to the condensers (9) of the kaite circles (1) are integrated so that when heat demand is greater than or equal to the waste heat, the mixing valve (13) is in a through-flow position and an increase in the heat flow temperature over the desired setpoint integration of the circulation of the heat carrier via the waste heat plant (6) through the transition of the mixing valve (13) into corner position for cooling the heat transfer medium, thereby promoting from heat medium medium to the waste heat plant __ (- £ -) - guaranteed, this is cooled there and by means of the pump (11) to the compressor sets (10) is supplied to the refrigerant liquefaction » 2. Circuit arrangement according to item 1, characterized in that a maximum Kältemas chinenprozeßwärme from the compressor set (10) by multi-stage Iflüssigke its cooling of the engine compressor (17) and the condenser (9) including the drive motor takes place, and a thermodynamically favorable Adjustment of Kälteinittelmengenströme and temperature differences between heat-emitting and heat-absorbing surface contours and the liquid cooling medium is made so that at the same time increased waste heat utilization, a specific higher cooling capacity of the refrigeration system (1) is achieved. 3. Circuit arrangement according to 'Punkt 1 and 2da characterized in that due to the existing closed heat transfer system (2) a corrosion and incrustation stable, liquid heat transfer medium can be used, so that the condition for derating by o.g. Effects on the heat-emitting surfaces of the compressor sets (10) connected in the system are largely eliminated and thereby the expenses for maintenance measures can be substantially reduced, 4 circuit arrangement according to item 1 to 3, characterized in that by the integration of a memory (5) compensation, which is caused by the dropout operation of the waste heat sources fluctuations in the heat carrier inlet temperature and that in corner position of the mixing valve (13), due to an oversupply of Waste heat, the removal of coolable liquid from the lower connection · the memory (5) by an existing temperature stratification for waste heat absorption is immediately available. - For this 1 sheet drawing - .2ttJAR19d3 * t> b3534