JPS6093274A - Engine waste heat utilizing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine exhaust heat utilization system that uses an engine as a power source and uses its exhaust heat to provide heating and cooling.

Conventionally, this type of engine exhaust heat utilization system that has been generally used uses heat source water heated by the exhaust heat of the engine 1 as shown in FIG. A configuration is adopted in which the heat exchanger 34 and the cooling heat exchanger 35 are connected to the cooling tower 24. That is, the heat source water obtained from the engine 1 is simply supplied as a heat source for the regenerator of the absorption refrigerator 33 during cooling, and furthermore, when the cooling load and exhaust heat are unbalanced and the heat emitted from the engine 1 cannot be sufficiently exhausted. In order to radiate the excess heat, it passes through a heat radiating heat exchanger 35. Of course, the hot water flow rate is controlled by a temperature sensor 36 and a control valve 37 installed in each pipe for temperature control.

In addition, during heating, the flow path is switched so that dry water passes through the heating heat exchanger 34 and does not flow into the absorption refrigeration unit 1133. Similarly, during heating, when the load and the amount of exhaust heat become unbalanced, hot water is passed through the heat exchanger 35 for heat radiation to control the temperature of the hot water. As described above, in order to perform heating and cooling using exhaust heat from the engine, a complex system is required that simply combines independent absorption refrigerators, heating heat exchangers, heat radiation heat exchangers, etc., and the size of the equipment does not increase. Of course, it is also a factor that leads to malfunctions.

In view of the above circumstances, the present invention aims to provide a simplified engine exhaust heat utilization system.

That is, the present invention has an absorption chiller configuration that has both the functions of heat exchange for heat radiation and heat exchange for heating. Directs hot water heated by the exhaust heat of the engine by switching valves with the heater, obtains cold water in the evaporator section when cooling is required, and switches dry water to the cold water channel only via the heating and heat radiation exchanger when heating is required, or This is a simple system that can radiate engine exhaust heat directly to the cooling tower when there is no load or when there is an imbalance between load and exhaust heat.

Hereinafter, the present invention will be explained based on drawings of embodiments.
It is as follows.

In FIGS. 2 and 3, 1 is an engine, and this exhaust heat pipe 2 is used as a heating pipe 5 of a regenerator 4 of an improved absorption chiller/heater 3. Valve 6.7 is provided at the front and rear of this heating pipe line 5.
At the same time, a control valve 11 serving as a three-way valve communicating with a cold water outlet moisture sensor 10 provided at the outlet of the cold water pipe 9 of the evaporator 8 is installed, and a branch valve 12 is installed at the tip of the heating pipe 5. The exhaust heat pipe 2 is connected to the heat exchanger 13 for heating and heat radiation. This heat exchanger for heating and heat radiation 1
Both ends of the hot water pipe 14 of No. 3 are connected to the cold water pipe 9 on the evaporator 8 side via valves 15 and 16. Furthermore, a hot water outlet temperature sensor 17 provided at the outlet of the hot water pipe 14 and a heat source water return temperature sensor 1 provided at the return part of the heating pipe 5 are also provided.
8 leads to a selector 21 that regulates a control valve 20 that is a three-way valve provided in the heat radiation pipe line 19 of the heat exchanger 13.

The cooling water pipe 19', which becomes the heat radiation pipe '+9, is connected to the condenser 22. It passes through the absorber 23 and forms a circulation waterway for the cooling tower 24.

To explain its function, when performing air conditioning, first open the valve 6゜7 of the heating pipe 5 section of the regenerator 4 and the valve 25゜26 of the cold water pipe 9 section of the evaporator 8, and then open the valve 25゜26 of the cold water pipe 9 section of the evaporator 8. The valves 15 and 16 of the hot water pipe 14 section of the heat exchanger 13 are closed.

In this state, the heat source water is guided to the regenerator 4, and the refrigerant vapor generated here is guided to the condenser 22.
The obtained liquid refrigerant is sprayed into the evaporator 8, and the latent heat at this time is used to turn the cold water pipe 9 into cold water, and the load means (not shown) disposed at the tip of the cold water pipe 9 obtains a cooling effect. It is something.

The adjustment means at this time is to control the amount of heat source water led to the regenerator 4 using a cold water outlet temperature sensor 10 of the evaporator 8 through a control valve 20 . Further, the heat source water return temperature sensor 18 at the outlet of the heat exchanger 13 for heating and heat radiation also controls the control valve 20 for heat radiation to perform desired cooling.

In addition, when performing heating, the heating and heat radiation heat exchanger 13
Valve 12 and drought pipe 14 for direct branching and flow to
Open valves 15 and 16 to regenerator 4 and conversely open valve 6 to regenerator 4.
．． Close valves 25,26 to 7 and evaporator 8. With this shift, the heat source water does not flow to the regenerator 4 side but directly to the heat exchanger 13, which heats the hot water pipe 14 and uses the cold water pipe 9 as the hot water pipe 14' to reduce the load at the tip. Means (not shown) provide a heating effect. At this time, the adjustment means controls the control valve 20 which performs heat radiation control using the hot water outlet temperature sensor 17.

Furthermore, if cooling or heating is not required, close the valve 6.7 to the regenerator 4 and the valve 15.16 of the hot water pipe 14, and close the branch valve 12 to directly transfer the exhaust heat from the engine 1 to the heat exchanger 13. The heat is converted to the heat radiation pipe 19 and radiated to the cooling water.

FIG. 4 shows another embodiment, in which the heating and heat radiation heat exchanger is separated into two heat exchangers, a heating heat exchanger and a heat radiation heat exchanger. That is, regenerator 4
Two bypass passages 27 and 28 are provided that branch from the exhaust heat pipe line 2 heading to
The heat exchanger 13b for heat radiation is connected to the heat exchanger 13b via the control valve 11 which becomes a three-way valve.
At the same time, a heating heat exchanger 1 is attached to the control valve 11.
It is formed by connecting the return path of 3a.

[The selector 21 provided in this control valve 11 is connected to a cold water outlet temperature sensor 10 at the outlet of the evaporator 8 and a drought outlet temperature sensor 17 provided at the outlet of the drought pipe of the heating heat exchanger 13a. It will be done.

Cooling water pipes 19' of the condenser 22 and the absorber 23 are connected to a control valve 20, which is a three-way valve installed in the heat radiation pipe 19 of the heat radiation heat exchanger 13b.

In this case, in order to obtain the cooling effect, the valve 6.7 to the regenerator 4, the bypass valve 30 that does not go to the heating heat exchanger 13a, and the valve 25.26 on the evaporator 8 side
On the other hand, the valves 31, 32 and the branch valve '12 to the heat exchanger 13a, and the valves 15, 16 of the hot water pipe 14
be quiet.

In this way, the heat source water flows to the regenerator 4, and the regenerator 4
．． Condenser 22. Evaporator8. The absorber 23 constitutes a refrigeration cycle, which cools the cold water pipe 9 facing the evaporator 8 for cooling purposes. At this time, the control valve 11 is controlled by the cold water outlet temperature sensor 10. In addition, the heat source water return temperature sensor 18
The control valve 20 on the side of the cooling water pipe 19' is controlled by this.

To obtain a heating effect, valves 31 and 32 of the heating heat exchanger 13a, branch valve 12, and valves 15 and 16 of the drought pipe 14 are opened, and conversely, valves 30 and 30 of the heating heat exchanger 13a are opened. Valve 6.7 on the regenerator 4 side and valve 25.26 on the evaporator 8 side are closed. However, the regenerator 4 does not work, and only the heat exchanger 13a exchanges heat, warming the hot water pipe 14, and the cold water pipe 9 connected to the hot water pipe 14 becomes a hot water pipe 14', which has a heating effect. do. At this time, the control valve 11 is controlled by the hot water outlet temperature sensor 17, and the control valve 20 is controlled by the heat source water return temperature sensor 18 to adjust the furrow drought as appropriate.

As mentioned above, the engine exhaust heat utilization system of the present invention introduces heat source water obtained from the engine to an absorption chiller/heater incorporating a heat exchanger for heating and heat dissipation, thereby replacing the conventional dedicated heating heat Compared to a single combination of an exchanger, a heat radiating heat exchanger, and a simple absorption refrigerator, the entire device becomes a single unit, and system control becomes easier.

[Brief explanation of drawings]

Fig. 1 is a system diagram of the conventional product, Fig. 2 is a system diagram of the present invention, Fig. 3 is an explanatory diagram of the absorption chiller/heater section, and Fig. 4 shows another embodiment. Figure 111. DESCRIPTION OF SYMBOLS 1...Engine, 2...Exhaust heat pipe, 3...Absorption cold/hot water (number, 4...Regenerator, 6.7...Valve, 10
...cold water...mouth warm melon sensor, 11...control valve, 12.
... Branch valve, 13 ... Heat exchanger for heating and heat radiation, 1
3a... Heat exchanger for IfIF7J, 13b... Heat exchanger for a heat, 14... Hot water pipe, 8... Evaporator, 1
5.16... Valve, 17... Hot water outlet temperature sensor, 18... Heat source water return temperature sensor, 20... Control valve, 21... Selector, 22... Condenser, 23...
- Absorber, 24... cooling tower. Figure 1 64 Figure 2 Figure 3

Claims (1)

[Claims] 1. The heat source water, which is the exhaust heat of the engine, is used as the heat source for the absorption chiller/heater, which consists of a regenerator, condenser, evaporator, and absorber. An engine exhaust heat utilization system characterized by directly performing a cooling action or a heating action, or performing only heat radiation by switching between a heat exchanger for heat radiation, a regenerator, a heat exchanger for heating and radiation, and a pulp in an evaporator.