JPS5850213Y2 - Heat recovery heating, cooling, and hot water equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat recovery air conditioning/heating/water supply device that supplies hot water to a swimming pool or the like by utilizing the exhaust heat of the Rankine cycle engine of a Rankine cycle drive refrigerator or the refrigeration cycle.

In a refrigerator using a Rankine cycle engine, condensation heat generated by the Rankine cycle engine and the refrigeration cycle is radiated into the atmosphere via cooling water circulating between a condenser and a cooling tower.

That is, since the cooling water is heated to no more than 38°C by the condenser, the temperature is considerably lower than the temperature of commonly used hot water supply (about 60 to 80°C).
For this reason, a large amount of heat is not reused due to the low temperature level, but is radiated from the cooling tower into the atmosphere via the cooling water.

The purpose of this invention is to reuse the condensed heat discharged by the above-mentioned Rankine cycle-driven refrigerator to supply a large amount of low-temperature hot water to heated pools, dishwashers, car washes, steam boilers, etc. Our goal is to provide the following.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
The drawing is a block diagram showing the configuration of a Rankine cycle drive refrigerator 1 and a heat recovery heating/cooling/water supply device 2 according to the present invention, and the Rankine cycle drive refrigerator 1 includes a Rankine cycle engine 3 and a drive source for the Rankine cycle engine. 4, refrigeration cycle 5, and cooling cycle 17.

The Rankine cycle engine 3 is composed of a steam generator 6, an expander 7, a condenser 8, and a refrigerant pump 9, and its driving source 4 is a heat exchanger 10 for exhaust heat recovery, and a high temperature in which the steam generator 6 is located. It is composed of a heat storage tank 11 and a circulation pump 12 that circulates a heat medium between the heat exchanger 10 and the high temperature heat storage tank 11, and the refrigeration cycle 5 is composed of a compressor 13, an evaporator 14, an expansion valve 15, and a condenser 16. has been done.

Next, to describe the operation of the Rankine cycle drive refrigerator 1, the temperature of the exhaust heat recovery exchanger 10 of the drive source 4 rises due to exhaust heat, solar heat, etc., and when the heat exchanger 10 reaches a predetermined temperature, the circulation pump 12 is set in advance to start operating.

Therefore, when the heat exchanger 10 is heated to a predetermined temperature, the circulation pump 12 is activated and the heat medium circulates between the heat exchanger 10 and the high temperature heat storage tank 11, so that the temperature inside the high temperature heat storage tank 11 rises. .

If the Rankine cycle engine 3 is set in advance to operate at around 95° C., the Rankine cycle engine 3 will start operating when the temperature inside the high temperature heat storage tank 11 rises to that temperature, and the Cycle 5 is activated to freeze the object in the evaporator 14.

Note that the reference numeral 26 is an auxiliary electric motor that operates the compressor 13.

The cooling cycle 17 includes a cooling tower 19 having a blower 18
, a controller 20 for controlling the operation of the blower 18, and a cooling tower outlet water temperature detector 21 connected to the controller 20. It is comprised of a circulation pump 22 that circulates cooling water between each of the condensers 8 and 16 and the cooling tower 19, and a condenser outlet water temperature detector 28.

Therefore, the cooling water heated by the condenser 8 of the Rankine cycle engine 3 and the condenser 16 of the refrigeration cycle 5 is cooled by the cooling tower 19 and then returned to the condensers 8, 1.
The temperature of the water when heated by the condensers 8 and 16 is approximately 38°C.

The heat recovery heating, cooling, and hot water supply device 2 according to the present invention includes the condenser 8
, 16 and the cooling tower 19, and there is a heat exchanger 2 inside.
The heat exchanger 23 is connected to a hot water storage tank 24 filled with water and a water channel through which the cooling water heated by the condenser passes.
and switching valves which are alternately connected to the cooling tower 19, in this embodiment valves a and l).

It is composed of a three-way valve 25 having C.

Therefore, if the valves a and l) of the three-way valve 25 are opened in advance, the cooling water heated by the condensers 8 and 16 and whose temperature has increased will pass through the valves a and l) and reach the heat exchanger 23 in the hot water storage tank 24. Therefore, the water in the hot water tank 24 can be heated by the heat exchanger 23.

The hot water in the hot water storage tank 24 that has been heated in this manner is sent to a hot water pool or the like for use.

The cooling water whose temperature has been lowered by being used to heat the water in the hot water storage tank 24 is then cooled in the cooling tower 29 and returned to the condensers 8 and 16 where it is fed to the circulation pump 22 again.

A hot water tank water temperature detector 27 is arranged inside the hot water tank 24.

This water temperature detector 27 is the condenser outlet water temperature detector 2 described above.
8, and is used to detect when the water temperature in the hot water storage tank 24 rises and the water temperature and the temperature of the cooling water heated by the condenser become below the set temperature, and upon this detection, the three-way valve By closing valve 25 and opening valves a and c, a cooling waterway that bypasses the hot water tank 24 can be configured.
It is possible to prevent the temperature of the relatively high hot water in the container from decreasing.

By the way, the above-mentioned cooling tower 19 has a capacity that can radiate the condensation heat generated by both the Rankine cycle engine 3 and the refrigeration cycle 5, so when the cooling water is cooled by taking the hot water supply load in the hot water storage tank 24, When the engine 3 is stopped and only the refrigeration cycle 5 is operated, its cooling capacity becomes excessive and the cooling tower outlet water temperature becomes lower than a predetermined temperature.

Therefore, in this case, the cooling water is cooled while the blower 18 is stopped.

As mentioned above, the heat recovery heating, cooling, and hot water supply system of the present invention can reuse the waste heat of the Rankine cycle refrigerator to supply hot water in large quantities to hot water pools and steam boilers, resulting in significant fuel cost savings. In addition, if the cooling capacity of the cooling tower is excessive, the blower can be stopped to reduce power consumption, making it very economical and of great industrial value.

[Brief explanation of drawings]

The drawing is a block diagram showing the configuration of a Rankine cycle driven refrigerator and a heat recovery heating/cooling/water supply device according to an embodiment of the present invention. 1... Rankine cycle drive refrigerator, 2...
... Heat recovery heating, cooling, and hot water supply equipment, 3 ... Rankine cycle engine, 4 ... Drive source, 5 ...
- Refrigeration cycle, 8... Condenser, 16...
... Condenser, 17... Cooling cycle, 18...
...Blower, 19...Cooling tower, 23...
...Heat exchanger, 24...Hot water storage tank, 25...
...Three-way valve.

Claims (1)

[Scope of utility model registration request] The cooling water heated by the condenser 8 of the Rankine cycle engine 3 and the condenser 16 of the refrigeration cycle 5 is transferred to the cooling cycle 1.
a hot water storage tank 24 having a heat exchanger 23 connected to a water channel through which the heated cooling water of the Rankine cycle drive refrigerator cooled by the cooling tower 19 of No. 7 passes; A heat recovery air-conditioning/heating/water supply device characterized by comprising a switching valve for switching to a tower 19.