SU987332A1 - Plant for producing heat and refrigeration - Google Patents

Description

(54) INSTALLATION FOR MANUFACTURE OF HEAT AND COLD

The invention relates to refrigeration engineering, in particular to installations for the production of heat and cold using heat pumps.

There are installations for the production of heat and cold containing two heat pumps, each of which has its own compressor, condenser and evaporator, a heating circuit including a boiler, heating devices, and a condenser of the first heat pump, a WATER source to which the cold-water circuit is connected. with a reservoir and a hot water circuit with a condenser of the second heat pump and a hot water accumulator, and a cold consumer connected to the evaporator of the second heat pump through a closed about a circulating water ring, while the evaporator of the first heat pump is connected to the water source 1.

A disadvantage of the known installations is their low efficiency due to the non-use of the heat-flowing gases and heat from the boiler, which caused the cold to consume.

The purpose of the invention is to improve the identity of the installation.

This goal is achieved by the fact that the installation additionally contains a contact gas-fueled heat exchanger included in the auto-circulation circuit, heated by waste gas or a boiler, and a surface heat exchanger connected by its second cavity to the evaporator of the first heat pump, as well as sequentially

10 the contact air duct and the second surface heat exchangers included in the closed circulating water ring between the cold consumer and the evaporator of the second heat pump;

15 the second cavity of the latter of which is included in the hot water circuit in front of the condenser of the second heat pump, the evaporator of which is additionally connected at the entrance to the water source and at the outlet to the cold water tank.

The drawing shows schematically the proposed installation.

It contains the compressor 1 entering the first heat pump, the condenser 2 and the evaporator 3 and the compressor pump 4 entering the second heat pump, the condenser 5 and the evaporator 6, the boiler 7, the OTO-I heating devices 8, the water source

30 9, cold water tank 10, hot water battery 11, consumer 12 {oloda, contact gaseous heat exchanger 137, surface heat exchanger 14, contact air duct heat exchanger 15, second surface heat exchanger 16.

In addition, the installation contains a drog; Sel 17 of the first heat pump, throttle 18 of the second heat pump, pumps 19-22, consumer 23 of hot water, consumer 24 of cold water, jumpers 25-34.;,

The installation works as follows.

In winter, water, heated in a contact gas-cooled heat exchanger 13 with waste gases from boiler 7, is pumped to pump 19 to a surface heat exchanger 14, in which it cools and returns to heat exchanger 13. Once heated in heat exchanger 14, water enters the evaporator 3 of the first heat pump, where it transfers its heat to the boiling working agent and then by pump 21 is again sent to the heat exchanger 14. Part of the heated water through the jumper 27 enters the condenser 5 of the second heat pump, which additionally heats up to the back constant temperature and accumulator 11 through the hot water is supplied to the consumer 23. Podyitka water pump 21 is supplied to the water chamber from the source 9,

The condenser 2 of the first heat pump is supplied with water coming out of the heaters 8, in which it is heated by the heat of condensation of working agent vapors, compressed by a compressor 1. Then the water of the heating circuit is heated in the boiler 7 and re-directed to the heaters 8. by pump 20.

Water from a water source 9 flows directly into the reservoir.

10 and oTCKJpa to the consumer of 24 COLD water. In addition, part of the water, preheated in the heat exchanger 1b due to the heat removed from the cold consumer 12, is fed through the condenser 5 and the battery

11k to the consumer 23 hot water. Water cooled in evaporator b

The second heat pump, supplied to the consumer 12 of cold, after which it is directed through the heat exchanger 16 and the heat exchanger 15 again to the evaporator b. The circulation of this water is carried out by the pump 22. When the cooling load decreases, the heat exchangers 16 and 15 or one of them can be turned off using jumpers 31 and 30.

During the transitional period, with a small heating load, the boiler 7 is turned off, the jumper 34 opens and the jumper 25 closes. In this, the water in the heating circuit heats up

only due to the heat of condensation generated in condenser 2 of the first heat pump. Through the evaporator 3 of the first heat pump, part of the water supplied from the water source 9 through bridges 26 and 28 is pumped into the tank 10 and the other part of the water is supplied through the heat exchanger 16 or past it through the bridge 29 and through the condenser 5 of the second heat pump / and the battery 11 23 hot water to the consumer.

During the period when the heating load is absent (summer period), the boiler 7 is shut off, and accordingly the contact gas / gas heat exchanger 13 and the first heat pump do not work. In this case, water from the water source 9 flows through the heat exchanger. 16 or past it through jumper 29 and further through the condenser 5 of the second heat pump and the battery 11 to the consumer 23 of hot water. When high-temperature water, for example, geothermal water, comes from source 9, a part of it is supplied directly through jumper 29, condenser 5 and accumulator 11 to hot water consumer 23. In winter, another part of the water is supplied for cooling to the evaporator 3 of the first heat pump and then through jumper 28 to the reservoir 10 to the consumer 24 of cold water.

In the summer, when the first heat pump is turned off, this part of the water is cooled in the evaporator 6 of the second heat pump. In this case, the water supply from the source 9 to the reservoir 10 is made using jumpers 32 and 33 (shown in dotted lines).

The economic efficiency of the proposed installation is expressed in the reduction of heat supply, due to the use of heat, from gases emitted from the boiler, by the cold consumer.

Claims (1)

1. USSR author's certificate I 305327, cl. F 25 B 29/00, 1971.