JPS6111446Y2 - - Google Patents

Description

[Detailed description of the invention] This invention installs a Rankine cycle expansion engine that uses the exhaust heat of an internal combustion engine as a heat source and a compression type refrigeration system that uses the expansion engine as a compression means, and by switching the circuit, the Rankine cycle The present invention relates to a Rankine cycle power plant in which a refrigeration system is installed side by side in which a cycle's expansion engine and compression refrigeration system can be operated selectively.

In the case of motorized fishing boats, the refrigeration system is installed separately from the prime mover, and this is a cause of increased costs for fishing boat auxiliary equipment. On the other hand, the refrigeration system of a fishing boat only needs to operate during a specific, limited period of time, so if the refrigeration system is constructed by using part of the prime mover, the equipment cost of the refrigeration system can be reduced. , it becomes possible to significantly reduce the cost of installing auxiliary equipment on fishing boats.

The present invention aims to meet these demands, and the present invention is a reciprocating engine that uses the exhaust heat of an internal combustion engine as a heat source, and the expansion engine is directly connected to the crankshaft of the internal combustion engine. The reciprocating engine can be used as a compressor for a refrigeration system by switching the circuit, thereby creating a refrigerant compressor in a refrigeration system.
The feature is that the cooler (condenser) and refrigerant (feeding) pump can be used as components of a Rankine cycle engine.

Next, embodiments of the present invention will be described with reference to figures.

Fig. 1 shows the circuit of a normal compression type refrigeration system, in which 1 is a motor that drives a compressor 2, 3 is a refrigerant cooler (condenser), 4 is a refrigerant (feeding) pump, 5 is an expansion valve, Reference numeral 6 denotes an evaporator (refrigeration cooler), in which an organic medium such as fluorocarbon is used as a refrigerant.

On the other hand, a normal Rankine cycle engine, as shown in FIG. The Rankine cycle engine uses an organic medium such as chlorofluorocarbons as the heat medium used in the above-mentioned refrigeration system, and the expansion engine 7 has the structure of a reciprocating engine, and its crankshaft 11 is a crankshaft of an internal combustion engine. Assume that it is directly connected to the shaft.

FIG. 3 shows the device of the present invention, in which the compressor 2, cooler 3, and refrigerant pump 4 in the refrigeration system shown in FIGS. 1 and 2 are replaced by an expansion engine 7 and a cooler 8 of a Rankine cycle engine, respectively. , and the pump 9, and so that the refrigeration system (refrigeration cycle) and Rankine cycle can operate independently, stoppers are installed at the refrigerant inlet and outlet of the refrigerant cooler 6 and the heater 10, respectively. It is configured by providing valves 12 to 15. Reference numeral 16 denotes an internal combustion engine that supplies waste heat to the heater 10 and receives output from the expansion engine 7 when this device operates on the Rankine cycle, and its output shaft 17 is used for propulsion of a fishing boat, and when the device operates as a refrigeration device. , the internal combustion engine 16 (in this case, the expansion engine 7 becomes a refrigerant compressor)
Drive compressor 2.

In addition, when this apparatus is used as a refrigeration system, the stop valves 12 and 14 are opened and the stop valves 13 and 15 are closed, and when it is used as a Rankine cycle engine, the stop valves 13 and 15 are opened and the stop valves 12 and 14 are closed. It will be clear that the system is closed and operates each circuit independently, with a common refrigerant being used in both circuits.

In this way, in the present invention, when configuring the Rankine cycle engine and the refrigeration system, the reciprocating engine that performs compression and expansion, the refrigerant cooler, and the refrigerant pump are used as dual-purpose parts, thereby reducing equipment costs and equipment space. This results in a very significant effect, especially when applied to fishing boats.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional refrigeration system, FIG. 2 is a circuit diagram of a Rankine cycle engine that uses engine exhaust gas as a heat source, and FIG. 3 is a circuit diagram of a prime mover according to the present invention. 1... Motor, 2... Compressor, 3, 8... Refrigerant cooler, 4, 9... Refrigerant pump, 5... Expansion valve,
6... Refrigeration cooler, 7... Expansion engine, 10... Heater, 12-15... Stop valve, 16... Internal combustion engine.

Claims (1)

[Scope of utility model registration request] A Rankine cycle engine that uses the exhaust heat of an internal combustion engine as a heat source is formed by forming its expansion device with a reciprocating engine and directly connecting its crankshaft to the crankshaft of the internal combustion engine, and by switching the circuit of the reciprocating engine. A Rankine cycle power unit with a refrigeration system installed in parallel that can be used as a compressor for the refrigeration system.