JPS5995344A - Method of operating heat pump by driving of engine - 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 [Technical Field of the Invention] The present invention relates to a method of operating a heat pump driven by an engine.

[Technical background of the invention and its problems]

The conventional engine-driven heat pump operation method is
When using external air as a heat source for a heat pump, the air is introduced into the evaporator from the outside, absorbs heat, and is then discarded outside. On the other hand, the temperature inside the engine block increases due to the heat dissipated by the equipment. As it rises,
Outside air was introduced here, cooled, and then discharged outside again.

Furthermore, engine waste heat, such as heat from lubricating oil, is cooled by cooling water (cooling tower), seawater, outside air, etc., and this heat is disposed of outside. As a result, the conventional device suffers from a large loss of usable energy, which poses a problem in terms of efficiency.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the prior art and provide an efficient method of operating a heat pump driven by an engine.

[Summary of the invention]

The present invention utilizes the air outside the heat pump device as a heat source for the heat pump, absorbs heat from this air, and introduces the cooled air into the engine as engine intake air without immediately exhausting it outside the device. The present invention relates to a method of operating a heat pump driven by an engine (first invention).

In addition, the present invention allows air outside the heat pump device to first flow into the engine block, absorbs the heat dissipated from the device itself within the block, and uses the heated air as a heat source for the heat pump. The present invention relates to a method of operating a heat pump driven by an engine, in which cooling air whose temperature is lower than that of the outside air is introduced into the engine as engine intake air (second invention).

Further, in the method of the first invention, the present invention provides a heat-absorbing fluid that is conducted in series in the order of a heat pump condenser, an engine lubricating oil cooler, an engine jacket water cooler, and an engine exhaust gas heat exchanger. The present invention relates to a method of operating a heat pump driven by an engine, which achieves a predetermined cooling effect and further increases the effect of the heat pump by obtaining high-temperature heating fluid (invention of E.6).

Furthermore, the present invention utilizes the air outside the heat pump device as a heat source for the heat pump, and also uses the fluid used to cool the heat generating parts of the engine for driving the heat pump, while the air cooled by the above use is used. The present invention relates to a method of operating an engine-driven heat pump that introduces air into the engine as engine intake air (fourth invention).

In the case of the fourth invention, there is provided a method of cooling lubricating oil in a lubricating oil cooler of an engine for driving a heat pump by evaporating the condensed refrigerant of the heat pump and using the heat of the lubricating oil as a heat source of the heat pump; This method includes a method in which a part of the lubricating oil cooled in the lubricating oil cooler of the driving engine is allowed to flow to cool the engine jacket.

Furthermore, in the case of the fourth invention, a sub-heat pump is operated separately in addition to the heat pump that covers the required heating load (this is the main heat pump), and a lubricant oil cooler of the engine for driving the main heat pump is operated. It also includes a method in which the heat of the lubricating oil in is used as a heat source for a sub-heat pump, and the external air heated by the sub-heat pump is used as a heat source for the main heat pump.

[@Ming Example]

An explanation will be given based on an embodiment of the present invention.

,? In Figure 1, the prisoner is the heat pump cycle room, ■)
is the engine block room. The compressor (1) is a super-dynamic shaft (
14) is driven by an engine (17)K. The refrigerant from the compressor (1) passes through the discharge gas pipe (5) to the condenser (2).
), it condenses and reaches the liquid pipe (6), and the expansion valve (4)
It expands in the evaporator (3), evaporates in the evaporator (3), absorbs heat from the external air supplied from the external air introduction pipe (9) by an appropriate means, and then passes through the gas suction pipe (force (8)) to the compressor (1) again. ) is inhaled.

In the condenser (2), the heat of condensation is taken out to the outside (12+) by the heat exchange pipe aυ through which another heat medium flows.The cooled air flows through the duct αa, and a part of it is sent from the discharge pipe αQ to the engine block. It flows out into the chamber ■, and the other part is taken in from the pipe Q51 through the engine intake muffler α barrel and into the intake pipe (from 19 to the engine a"l).The exhaust gas discharged from the engine fin passes through the exhaust gas pipe (A). The exhaust gas is introduced into the boiler Qυ, and another heat medium that flows in through the inlet pipe (A) absorbs the exhaust heat and transfers the heat.The exhaust gas is discharged to the outside through the outlet pipe (F).The engine aη has a jacket. A pipe (c) and a jacket water cooler are installed, and the cooling water is introduced into the inlet pipe (2η
After being cooled, it flows out from the outlet pipe (c).

In addition, the engine is equipped with a lubricating oil cooler (2!■).The liquid branch pipe (30,
) communicates with the liquid branch pipe (304) of the engine block chamber (3), the liquid refrigerant is expanded by the expansion valve O4, and evaporated in the lubricating oil cooler (c) to cool the decoy lubricating oil. Gas branch pipe (31,
) is connected to the gas branch pipe (31+) of the heat pump cycle, so the evaporated refrigerant gas flows to the gas branch pipe (314), and then passes through the evaporation pressure regulating valve (2) to the gas suction pipe (8).
The refrigerant gas is sucked into the compressor (1) together with the refrigerant gas from the gas suction pipe (7). Lubricating oil for engine αD is piped (goods)
The oil flows into the wholesale oil cooler 4 and is cooled, and then returns to the engine αη through the pipe 0. The refrigerant gas evaporated in the lubricating oil cooler (21) is transferred from the gas branch pipe (31,) to the compressor a (1) of the heat pump cycle (a set of screws) at an intermediate temperature higher than the suction evaporation temperature after the gas is trapped in the rotor. f+f may be introduced into the pressure branch pipe (slc).

When the engine block room ■ is surrounded by a soundproof and insulating wall, in order to absorb and utilize the radiant heat emitted from the engine, etc., the outside air is taken in from the outside air intake pipe (3N1) and the radiant heat etc. mentioned above is absorbed. After that, it flows into the heat pump chamber (B) through the communication passage and flows from the inflow pipe a (to the outside air introduction pipe (9).
).

In the above embodiment, when the entire amount of outside air that is absorbed by the evaporator (3) of the heat pump is supplied from the outside air introduction pipe (9), the heat given to the heat medium flowing through the heat exchanger αD by the condenser (2): Therefore, if the outside temperature is 1oc (winter), it will be around 45-50r, and if the outside temperature is 35c (summer), it will be around 7.
A temperature of about 0 to 7 sc can be obtained from the heat medium. On the other hand, by absorbing heat in the evaporator (3), the outside air is cooled to sc in the winter and 3 (Ic in the case of y), flows through at least the duct QOI, and is sucked into the engine a7j.

The air temperature can be lowered by about 1.5 sc compared to the outside air. Since the outside air temperature of the engine intake air is higher in winter and in stables, the air density in winter is higher (because the temperature is lower), so the amount of air coming out of the engine increases by about 10% compared to in a storm. From this, it is possible to obtain higher output throughout the year by lowering the air temperature at least in the summer. This is because the air density is high, so there is a large amount of oxygen, and the amount of fuel can be increased accordingly. Generally, a turbocharger is attached to increase the amount of air 11 to increase horsepower, but this can further increase output by nearly 10%.

Conventionally, the air that has absorbed heat from the outside air is condensed into the outside air in the evaporator (3), but by drawing it into the engine as low-temperature air instead of discarding it, the air line increases as described above and the horsepower increases. can be increased.

In addition, the temperature inside the engine block rises due to heat dissipated from the engine, etc., so it must be cooled down. In order to use this as the heat temperature for the heat pump, the route leading to the engine air intake must be changed as follows. Change it like this. That is, first, outside air is taken in from the outside air intake pipe (37), the inside of the engine block chamber CBl is cooled by this air, and the air whose temperature has increased due to heat absorption is passed through the communication path (to) and then sent to the heat pump chamber (5). ) and flowing into the outside air introduction pipe (9) from the inlet pipe (31), the air temperature can be raised more than directly introducing outside air from the outside air introduction pipe (9), so the evaporation temperature can also be raised somewhat. (However, the temperature of the air flowing through the field is lower than the temperature of the outside air), and the efficiency of the heat pump can be increased (because the compression ratio can be lowered).

Furthermore, in the lubricating oil cooler (c) of engine α7) for driving the heat pump, the condensed refrigerant of the heat pump, which is lubricating oil, is evaporated to cool it down, while the exhaust heat of the lubricating oil is used as a heat source for the heat pump to cool the whole device. can improve the heat recovery rate and increase thermal efficiency.

In addition, when the entire amount of heat pump is absorbed and cooled from the outside air introduction pipe (9), the amount of heat absorbed is greater than the amount of heat absorbed by the engine, so the cooling air for Namin is sent to the engine block chamber () 31 from the discharge pipe θ6).
is cooled and discharged from the discharge pipe 06). Outside air introduction W (
When air is not taken in through the duct (1), but outside air is taken in through the entire outside air intake pipe (l37) to cool the engine block chamber CB), and then heat is absorbed from the entire inflow pipe (13), some of the cooled air passes through the duct (1) and is partially supplied to the engine. The excess air is discharged through the discharge pipe (
16), and then the surplus air is mixed with the excess air from the outside air intake pipe 07) and mixed into the inflow pipe U.
is inhaled. At this time, the outside air introduction pipe (9) is closed.

In Figure 2, the condenser (2
) The heat medium flowing through the heat exchange tube aυ that absorbs the released heat of The flow path (
41) (42f43 This embodiment differs from the embodiment shown in Fig. 1 in that it is connected in sequence at (44), but the other configurations are the same. Structural parts with the same reference numerals have the same functions as those in Fig. 1. It is.

In conventional technology, engine lubricating oil coolers are cooled using a separate cooling source such as cooling water (with one cooling tower), seawater, or outside air, and this heat is discarded. There is a lot of heat loss because the heat from the cooling water in the cooler is not used and the exhaust gas from the engine is also discarded to the outside.
According to this embodiment, the heat medium of the heat exchange tube (11) is heated in the condenser (2) and then further heated using the above-mentioned conditions, so that the temperature of the condenser (2) of the heat pump is can be kept low (maximum 80-85C), and the coefficient of performance of the heat pump can be improved. Note that the temperature of the jacket water cooler (2I19) is 90C or higher, and the exhaust gas temperature of the exhaust gas boiler (21) is 450 to 500C.

The embodiment shown in FIG. 26 differs from the embodiment shown in FIG. 1 in that the lubricating oil cooler is cooled using a sub-heat pump, but the other configurations are the same. Structural parts with the same reference numerals have the same functions as those in FIG. In the embodiment shown in Fig. 1, the lubricating oil cooler was cooled using the liquid refrigerant separated from the liquid branch pipe (30 cL), but in the embodiment shown in Fig. 3, the compressor (1) is used as the main compressor. A power source outside the main heat pump (sub compressor (4η) driven by a 4-hammer
By operating the auxiliary heat pump that uses the The obtained exhaust heat of the lubricating oil is released from the condenser (46), and is absorbed by the decompressed air taken in from the outside air intake pipe 01 flowing through the engine block chamber (5), and is absorbed by the air flowing through the communication path (2). By being used as a heat source for the evaporator (3) of the main heat pump cycle through the inflow tube α powder, it helps improve the thermal efficiency of the entire device.

In FIG. 4, part of the lubricating oil cooled by evaporation of the refrigerant in the lubricating oil cooler (c) is transferred to a branch pipe 601C'.
The embodiment differs from the embodiment shown in Fig. 1 or Fig. 6 in that the jacket water is diverted to the jacket water cooler (c) by means of il) to also cool the jacket water, but the functions of structural parts with the same reference numerals are are the same. According to this embodiment, the exhaust heat of the jacket water can be added to the exhaust heat of the lubricating oil as a heat source for the evaporator of the heat pump cycle, so that the heat recovery efficiency of the entire apparatus can be improved.

〔Effect of the invention〕

As can be seen from the above description based on the embodiments, the present invention comprises:
The outside air used as a heat source for the heat pump becomes lower in temperature than the outside air temperature and is used as intake air for the engine, increasing the output of Nishijin.
In addition, by utilizing the heat released in the engine block chamber and the waste heat obtained as a result of cooling various parts of the engine, the coefficient of performance of the heat pump can be improved, and the overall thermal efficiency of the entire equipment can be improved by increasing the heat recovery rate of the entire equipment. improvement can be achieved.

[Brief explanation of the drawing]

1 to 4 are system diagrams of different embodiments of the present invention. Capacity: heat pump cycle room, ■), fist engine block room, (11, ψ compressor, (2), Φ condenser, (9)
・・Outside air intake pipe, Wholesale・・Engine, (19・・Intake pipe,
(2I) ψ・Exhaust gas boiler as exhaust gas heat exchanger, (c)・Jacket water cooler, Kanji・Lubricating oil cooler, 07)・Outside air intake pipe, (46)・Condenser, ( 47
)... Sub-compressor.

Claims (1)

[Claims] (11) A method for operating a heat pump driven by an engine, in which external air is used as a heat source for the heat pump and heat is absorbed from the air, and the cooled air is introduced into the engine as intake air. Operation of a heat pump driven by an engine in which the air flows into the engine block, absorbs the heat dissipated in the engine block, uses this air as a heat source for the heat pump, absorbs heat from this air, and introduces the cooled air into the engine as intake air. Method. (3) External air is used as a heat source for the heat pump, and heat is absorbed from it, and the cooled air is introduced into the engine as intake air, and the heat pump condenser, engine lubricating oil cooler, and engine jacket water cooler , a method of operating a heat pump using an engine J+%%'l that obtains a heating fluid by passing heat-absorbing fluid through the exhaust gas heat exchanger of the engine in this order. (4) External air as the heat source of the heat pump and the engine for driving the heat pump. A method for operating an engine-driven heat pump that uses fluid that has been cooled and introduces the cooled air into the engine as intake air. (5) In the lubricating oil cooler of the engine for driving the heat pump, the lubricating oil is used as the condensed refrigerant of the heat pump. A method of operating a heat pump by driving an engine and driving the engine according to claim 114, wherein the heat of the lubricating oil is cooled by evaporation and used as a heat source of the heat pump. (6) An engine for driving the main heat pump using a main and sub heat pump. The engine drive according to claim 4, wherein the heat of the lubricating oil in the lubricating oil cooler is used as a heat source for the auxiliary heat pump, and the external air heated by the condenser of the auxiliary heat pump is used as the heat source for the main heat pump. (7) A method of operating a heat pump according to claim 5 or 16, wherein the lubricating oil cooled in the lubricating oil cooler is partially flowed to cool the jacket water cooler of the engine. How to operate a heat pump driven by an engine.