CN101059084A - Waste heat utilization device and control method thereof - Google Patents
Waste heat utilization device and control method thereof Download PDFInfo
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- CN101059084A CN101059084A CNA2007100966642A CN200710096664A CN101059084A CN 101059084 A CN101059084 A CN 101059084A CN A2007100966642 A CNA2007100966642 A CN A2007100966642A CN 200710096664 A CN200710096664 A CN 200710096664A CN 101059084 A CN101059084 A CN 101059084A
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- waste fluid
- used heat
- utilized device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00949—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator
Abstract
A waste heat utilization device includes a Rankine cycle in which an operation fluid circulates, and a control unit which controls an operation of the Rankine cycle. The Rankine cycle has a heater for heating the operation fluid using a waste fluid with a waste heat from a heat engine, an expander that expands the heated operation fluid to recover a mechanical energy, and a condenser for cooling and condensing the expanded operation fluid. The control unit operates the Rankine cycle when a waste fluid temperature is not less than a predetermined temperature and when the waste fluid is in a flowing state in the heat engine.
Description
Technical field
The present invention relates to a kind of used heat utilized device and controlling method thereof.For example, the used heat utilized device can be used to reclaim the used heat of vehicle motor.
Background technique
Traditionally, in having the vehicle of rankine cycle, only when the temperature (used heat) of engine cooling water when being not less than predetermined temperature, the rankine cycle operation, and when temperature was not enough, rankine cycle stopped, for example described in US patent 6,928,820 (corresponding JP-A-2005-155336).Therefore, can prevent that engine temperature from exceedingly reducing, and can carry out waste heat recovery and do not reduce the oil consumption rate of motor.
Yet, when being used for the pump of cycle engine cooling water in as the vehicle that stops vehicle (idling stop vehicle) such as hybrid vehicle and zero load by engine-driven mechanical pump, even wherein when vehicle in use the time, motor can stop according to travelling state, and engine cooling water is not recycled when motor stops.Therefore, when rankine cycle is only moved based on the temperature of engine cooling water, rankine cycle will not used and make Waste Heat Recovery System (WHRS).
Summary of the invention
Consider the problems referred to above, the purpose of this invention is to provide a kind of used heat utilized device of guaranteeing waste heat recovery, and controlling method.
According to an aspect of the present invention, the used heat utilized device comprises the operating fluid control unit of operation of circuit rankine cycle and control rankine cycle therein.Rankine cycle has: heater, and heater uses the waste fluid heating operation fluid that has from the used heat of heat engine; Expander, the operating fluid of expander expansion heating is to reclaim mechanical energy; And condenser, condenser is used to cool off the operating fluid that expands with condensation.When the waste fluid temperature is not less than predetermined temperature and when waste fluid is in flowing state in heat engine, control unit operation rankine cycle.
Because control unit is not only determined the flowing state of waste fluid temperature but also definite waste fluid, therefore rankine cycle is guaranteed operation when waste heat recovery is possible.As a result, waste heat recovery can be carried out effectively, and can improve the specific fuel consumption of vehicle.
According to a further aspect in the invention, provide a kind of controlling method that comprises the used heat utilized device of rankine cycle.Rankine cycle is utilized the operating fluid in the heater heats rankine cycle, the waste fluid that has from the used heat of heat engine is used in described heating, rankine cycle utilizes the operating fluid of expander expansion heating with recovery mechanical energy, and the operating fluid that utilizes condenser cooling and condensation to expand.This method may further comprise the steps: determine that whether the waste fluid temperature is less than predetermined temperature; Determine whether waste fluid is in flowing state; When being not less than predetermined temperature and waste fluid when the waste fluid temperature and being in flowing state, the operation rankine cycle.
Utilize above-mentioned controlling method, can realize the preceding described effect on the one hand of the present invention.
Description of drawings
Other purpose of the present invention and advantage will become clearer from the DETAILED DESCRIPTION OF THE PREFERRED below in conjunction with accompanying drawing.Among the figure:
Fig. 1 is the schematic representation that has shown according to the used heat utilized device of first embodiment of the invention;
Fig. 2 A and 2B are the viewgraph of cross-section that has shown according to first embodiment's compression/expansion unit;
Fig. 3 is a flow chart, has shown the process of carrying out according to the control unit of first embodiment's used heat utilized device by being used to control;
Fig. 4 has shown the chart that is set in the temperature and the relation between the determined value of the cooling water in the control unit according to first embodiment;
Fig. 5 is a schematic representation, has shown when cool cycles is in operation, according to the running state of first embodiment's used heat utilized device;
Fig. 6 is a schematic representation, has shown when rankine cycle is moved, according to the running state of first embodiment's used heat utilized device;
Fig. 7 is a flow chart, has shown the process of being carried out by the control unit that is used for the Rankine/air-conditioning cooperation control according to first embodiment;
Fig. 8 is a chart, has shown the determined value that is set in the control unit and the relation between the temperature of the cold water of evaporator temperature TE;
Fig. 9 is a Schedule, has shown according to the running state in normal air-conditioning control and Rankine in first embodiment's the control unit/air-conditioning cooperation control;
Figure 10 is a schematic representation, has shown the used heat utilized device according to second embodiment of the invention;
Figure 11 is a flow chart, has shown by the performed process of control unit that is used to control according to second embodiment's used heat utilized device;
Figure 12 is a chart, shown according to second embodiment, be set in cooling water flow in the control unit and the relation between the determined value;
Figure 13 is a flow chart, has shown by the performed process of control unit that is used for the Rankine/air-conditioning cooperation control according to second embodiment;
Figure 14 is a schematic representation, has shown the used heat utilized device according to third embodiment of the invention;
Figure 15 is a schematic representation, has shown the used heat utilized device according to fourth embodiment of the invention;
Figure 16 is a flow chart, has shown the performed process of control unit that is used to control the used heat utilized device according to the 4th embodiment;
Figure 17 is a flow chart, has shown the 4th embodiment's the performed process of control unit that is used for Rankine/air-conditioning cooperation control;
Figure 18 is a schematic representation, has shown the used heat utilized device according to fifth embodiment of the invention;
Figure 19 is a schematic representation, has shown the used heat utilized device according to sixth embodiment of the invention;
Figure 20 is a flow chart, has shown the performed process of control unit that is used to control the used heat utilized device according to the 6th embodiment;
Figure 21 is a time diagram, has shown the heat loss amount according to the 6th embodiment's condenser, the cooling capacity of needs and the rotation number of expander;
Figure 22 is a schematic representation, has shown the used heat utilized device according to seventh embodiment of the invention; And
Figure 23 is a schematic representation, has shown the used heat utilized device according to eighth embodiment of the invention.
Embodiment
(first embodiment)
In first embodiment, used heat utilized device 20 typically is used for hybrid vehicle, and described hybrid vehicle has drive electric motor of being used for 140 and motor (heat engine) 10, and described motor is according to the operation of the drive condition of vehicle or stop.Used heat utilized device 20 comprises as the refrigeration cycle 20A of basis circulation (basecycle) and is used for from the rankine cycle 30A of the waste heat recovery energy of motor 10 generations.Be arranged on compression member and the dilation of circulation 20A and 30A as the compression/expansion unit 110 of fluid machinery.Circulation 20A and 30A and compression/expansion unit 110 are by control unit 40 controls.Hereinafter with reference to the used heat utilized device 20 of Fig. 1 explanation according to first embodiment.
Compression/expansion unit 110 is in compact model (as compressor operating) and expansion mechanism (as the expander operation) operation down, wherein said compact model is used for compression and discharges gas refrigerant, described expansion mechanism is used for the fluid pressure of the superheated vapor refrigerant between the phase of expansion is converted into kinetic energy, and output mechanical energy.Compression/expansion unit 110 links to each other with electric generator/electric motor 120, and wherein said electric generator/electric motor 120 not only is used as generator but also be used as motor.When compression/expansion unit 110 moved under compact model, electric generator/electric motor 120 arrived compression/expansion unit 110 as the energy so that motive force (R1) to be provided.When compression/expansion unit 110 moved under expansion mechanism, electric generator/electric motor 120 produced electric power as generator in order to being used in the motive force (R2) that reclaims at 110 places, compression/expansion unit.The electric power that is produced by electric generator/electric motor 120 is filled in battery, and is used for the common operation (for example, headlight and engine standby machine) of ato unit 10 and all kinds of consumers.Further details about compression/expansion unit 110 below will be described.
Vaporizer 24 is heat exchangers, and vaporizer 24 evaporation realizing heat-absorbing action, and utilizes the heat-absorbing action cooling to be used for the air of air conditioning by the refrigeration agent of decompressor 23 decompressions.Safety check (checkvalve) 24a is arranged on the refrigerant outlet side of vaporizer 24, so that refrigeration agent only flows to compression/expansion unit 110 from vaporizer 24.
The waste heat recovery energy (that is, the driving energy of expansion mechanism lower compression/expansion cell 110) of rankine cycle 30A from producing motor 10, described motor 10 produces the driving force of vehicle.20A is the same with refrigeration cycle, and rankine cycle 30A uses condenser 21 and gas-liquid separator 22.Refrigeration agent is walked around condenser 21 by first bypass channel 31 and second bypass channel 32, wherein said first bypass channel 31 is connected to some A between compression/expansion unit 110 and condenser 21 from gas-liquid separator 22, and described second bypass channel 32 is from being connected to the some C between condenser 21 and some A at the some B between compression/expansion unit 110 and the safety check 24a.
In first bypass channel 31, liquid pump 33 and safety check 31a are set to, and refrigeration agent only can flow to liquid pump 33 from gas-liquid separator 22.Heater 34 is arranged between an A and the compression/expansion unit 110.Heater 34 is heat exchangers, the heat exchange between the engine cooling water (waste fluid) of the hot-water return 10A that heater 34 utilizes at refrigeration agent of being sent by liquid pump 33 (operating fluid) and motor 10 and heating and cooling agent.
The temperature transducer 14 that is used for the temperature of detection of engine cooling water is arranged on the outlet side of hot-water return 10A.Be transfused to control unit 40 by temperature transducer 14 detected temperature as signal.Motor 10 has the speed probe (revolution detector) 15 that is used to detect revolution.Similar to temperature, the revolution that detects (output) by speed probe 15 is transfused to control unit 40 as signal.
In second bypass channel 32, safety check 32a is set to, and refrigeration agent only can flow to the refrigerant inlet side of condenser 21 from compression/expansion unit 110.Between an A and some C, switch valve 35 is set.Switch valve 35 is the solenoid valves that are used to open and close coolant channel, and switch valve 35 is by control unit 40 controls.Control valve 36 is arranged on the refrigeration agent of the compression/expansion unit 110 under the compact model and discharges on the side.When compression/expansion unit 110 moved under compact model, control valve 36 was used as safety check to stop the discharge of refrigeration agent.On the other hand, when compression/expansion unit 110 moved under expansion mechanism, control valve 36 became open mode.Control valve 36 is by control unit 40 operations.
Next, will the structure and the operation of compression/expansion unit 110 be described.In this embodiment, compression/expansion unit 110 is configured to aerofoil profile (vane-type; Perhaps leaf type) fluid machinery.Fig. 2 A has shown the compression/expansion unit 110 under the compact model, and Fig. 2 B has shown the compression/expansion unit 110 under the expansion mechanism.
When compression/expansion unit 110 moved under compact model, control valve 36 was as safety check, and rotor 120a is rotated to suck and compressed refrigerant by electric generator/electric motor 120.Utilize control valve 36 to prevent that the high-pressure refrigerant of discharging from flowing back into rotor 120a side.
When compression/expansion unit 110 moved under expansion mechanism, control valve 36 was opened.The superheated vapor that produces in heater 34 is inhaled into compression/expansion unit 110 and is inflated with rotor 120a with heat energy and is converted into mechanical energy.Thereby rotating force is produced by the compression/expansion unit under the expansion mechanism 110.
As shown in fig. 1, control unit 40 be transfused to for example air conditioning (A/C) demand signal, from the signal of temperature transducer 14 with from the signal of speed probe 15.The air conditioning demand signal is determined according to the setting temperature of for example being set by the passenger, environmental conditions (for example, external air temperature and enter the solar radiation quantity in compartment).Control unit 40 is according to input signal, and control is such as liquid pump 33, switch valve 35, compression/expansion unit 110, control valve 36 and electric generator/electric motor 120.
Next, with reference to the control operation of the flow chart description among Fig. 3 according to first embodiment's the used heat utilized device of carrying out by control unit 40 20.
At first, at step S110, determine whether to exist air conditioning request from the passenger.When determining to have air conditioning request (YES), proceed to step S120, and whether be the abundant temperature that is used to add the refrigeration agent at hot heater 34 places according to the temperature of determining engine cooling water from the signal of temperature transducer 14.
As shown in Figure 4, increase to the second predetermined temperature Tw2 and when above, determine that the temperature of engine cooling water becomes the abundant temperature (determined value 1) that is used to heat from the temperature that is lower than the second predetermined temperature Tw2 when the temperature of engine cooling water.When the temperature of engine cooling water is reduced to when being lower than the first predetermined temperature Tw1, the wherein said first predetermined temperature Tw1 is lower than the second predetermined temperature Tw2, and the temperature of determining engine cooling water is not the abundant temperature (determined value 0) that is used to heat.In this way, provide hysteresis (hysteresis) for the temperature of determining engine cooling water.It is 5-10 degree for example that the first predetermined temperature Tw1 and the second predetermined temperature Tw2 are confirmed as difference between Tw1 and the Tw2.
When the temperature of determining engine cooling water at step S120 is not the abundant temperature (NO) that is used to heat, proceed to step S130.Then, carry out normal air and regulate control, and refrigeration cycle 20A moves continuously.Particularly, under the state that liquid pump 33 stops, switch valve 35 is opened, and control valve 36 is as safety check, and electric generator/electric motor 120 is powered with rotor 120a.Thereby, as shown in Figure 5, refrigeration cycle is with the order circulation of compression/expansion unit (compressor) 110, heater 34, condenser (thermal loss device (heat waster)) 21, gas-liquid separator 22, decompression machine 23, vaporizer (radiating fin) 24 and compression/expansion unit (compressor) 110.The revolution of rotor 120a (being the revolution of compressor) is based on the first target temperature TEO1 at evaporator outlet place (for example temperature of first target temperature of engine cooling water or other parts relevant with engine cooling water temperature) control, and the wherein said first target temperature TEO1 is according to calculating such as external air temperature, air conditioning setting temperature and the value from various sensors inputs that enters the solar radiation quantity in compartment.After step S130 is performed, turn back to step S110, and the later step in the execution graph 3.
When determining that at step S120 the temperature of engine cooling water is the abundant temperature (YES) that is used to heat, proceed to step S140.Then, carry out Rankine/air conditioning cooperation control, and the operation of the operation of rankine cycle 30A and refrigeration cycle 20A is changed suitably.Details about Rankine/air conditioning cooperation control below will be described.After execution in step S140, turn back to step S110, and repeat the later step among Fig. 3.
At step S110, when determining not have air conditioning request (NO), proceed to step S150, and similar to step S120, whether be the abundant temperature that is used in heater 34 places heating and cooling agent based on the temperature of determining engine cooling water from the signal of temperature transducer 14.When the temperature of determining engine cooling water is the abundant temperature (YSE) that is used to heat, proceed to step S160, and based on determining from the signal of speed probe 15 whether motor 10 is in the operation (running state).When definite motor 10 is in the operation (ON), because water pump 12 launched machine 10 operations determine whether the flow of engine cooling water is the abundant amount (that is, engine cooling water is in flowing state) that is used in heater 34 places heating and cooling agent.Then, proceed to step S170, and carry out rankine cycle.
Particularly, under the state that switch valve 35 cuts out and control valve 36 is opened, liquid pump 33 operations.Thereby as shown in Figure 6, refrigerant cycle is with the order circulation of gas-liquid separator 22, first bypass channel 31, liquid pump 33, heater 34, compression/expansion unit (expander) 110, second bypass channel 32, condenser 21 and gas-liquid separator 22.When rankine cycle 30A is in when in service, the revolution of electric generator/electric motor 120 is controlled according to the temperature of engine cooling water, so that can obtain maximum generation power at electric generator/electric motor 120 places.After execution in step S170, to step S110, and the later step among repetition Fig. 3.
When the temperature of determining engine cooling water at step S150 place is not the abundant temperature (N0) that is used to heat, perhaps when not being in operation (NO) (promptly at step S160 place motor 10, engine cooling water is not in flowing state) in the time, proceed to step S180.Then, liquid pump 33 stops, and the power supply of electric generator/electric motor 120 is stopped, and rankine cycle 30A and refrigeration cycle 20A does not move (OFF).After step S180 carries out, turn back to step S110, and repeat the later step among Fig. 3.
Next, the details of the Rankine of carrying out at step S140 place with reference to the flow chart description among Fig. 7/air conditioning cooperation control.
At step S210 place, calculated at the second target temperature TEO2 at the evaporator outlet place that is used for Rankine/air conditioning cooperation control (for example, the temperature of second target temperature of engine cooling water or other parts relevant) with engine cooling water temperature.Particularly, be used for the first target temperature TEO1 that normal air regulates the same evaporator outlet place of control (the step S130 of Fig. 3) according to being calculated such as external air temperature, air conditioning setting temperature and the value of importing from various sensors that enters the solar radiation quantity in compartment.Then, determine the predetermined value of the second target temperature TEO2 at evaporator outlet place than the low for example 1-5 of TEO1 degree.
At step S220 place, S160 is similar to step, and is in service based on determining from the signal of speed probe 15 whether motor 10 is in.When definite motor 10 is in the operation (ON), whether the flow of determining engine cooling water is enough to be used in heater 34 places heating and cooling agent (promptly, engine cooling water is in flowing state), and whether be the abundant amount that is used for the operation of rankine cycle 30A from the waste heat of motor 10.Then, proceed to step S230, and whether the operation of definite refrigeration cycle 20A is requested.When the operation of determining refrigeration cycle 20A is not requested (NO), proceed to step S240, and control valve 36, switch valve 35 and liquid pump 33 are controlled to rankine cycle 30A and are moved.After execution in step S240, turn back to the The whole control program among Fig. 3.
The second target temperature TEO2 by the evaporator outlet place and the true temperature TE at evaporator outlet place are (for example, the temperature of the true temperature of engine cooling water and other parts relevant with engine cooling water temperature) necessity of the operation of refrigeration cycle 20A is determined in comparison.Particularly, as shown in Figure 8, the 3rd target temperature (for example, the temperature of the 3rd target temperature of engine cooling water or other parts relevant with engine cooling water) is set to the high predetermined temperature than TEO2.When true temperature TE is increased to the 3rd target temperature TEO3 and when above, determines that the operation of refrigeration cycle 20A is requested (determined value is 1) from the temperature that is lower than the 3rd target temperature TEO3.On the other hand, when true temperature TE is reduced to when being lower than the second target temperature TEO2, determine that the operation of refrigeration cycle 20A is not requested (determined value 0).In this way, determine to provide hysteresis for refrigeration cycle 20A is whether requested.In this example, target temperature TEO1, TEO2, TEO3 are with the target air temperature by vaporizer 24 coolings.
At step S220, when definite motor 10 is not in operation (OFF), proceed to step S250, the revolution of compression/expansion unit (compressor) 110, be that the revolution of rotor 120a is calculated based on the second target temperature TEO2.Then, at step S260, electric generator/electric motor 120 is powered the revolution rotor 120a that calculates with at step S250 to be used for, and liquid pump 33, switch valve 35 and control valve 36 are controlled to refrigeration cycle 20A and are moved.After execution in step S260, turn back to the The whole control program among Fig. 3.
In this way, in Rankine/air conditioning cooperation control, when refrigeration cycle 20A is moved, the target temperature at evaporator outlet place is set to the second target temperature TEO2, and the described second target temperature TEO2 is lower than the first target temperature TEO1 (cooling capacity of promptly satisfying the demand) that regulates use in the control in normal air.Thereby the discharge capacity of compression/expansion unit (compressor) 110 increases so that cooling capacity becomes more than the cooling capacity of needs.Therefore,, can obtain not a period of time of running refrigerating circulation 20A, regulate control with normal air and compare and do not reduce cooling capacity, and this section period can be used to move rankine cycle 30A even when air conditioning is requested.
Fig. 9 has shown the running state of the rankine cycle 30A in each normal air is regulated the compressor revolution of the compression/expansion unit 110 in control (the step S130 among Fig. 3) and Rankine/air conditioning cooperation control (the step S140 among Fig. 3) and controlled according to Rankine/air conditioning cooperation of the change of the revolution of motor 10.In normal air conditioning control, compression/expansion unit (compressor) 110 moves continuously according to cooling load.Yet in Rankine/air conditioning cooperation control, when refrigeration cycle 20A was moved, the revolution of compression/expansion unit (expander) 11 was set to higher, and when refrigeration cycle 20A stopped, rankine cycle 30A was moved.When refrigeration cycle 20A was moved, rankine cycle 30A stopped usually.
As mentioned above, according to present embodiment, even in the vehicle hybrid vehicle that motor 10 can stop in use the time, when whether definite rankine cycle 30A should be moved, control unit 40 determines not only whether the engine cooling water of motor 10 is the abundant temperature that are used for the heating and cooling agent, it is in service to determine also whether motor 10 is in, to be used to confirm the flow of engine cooling water.When motor 10 is not in when in service, control unit 40 determines that engine cooling waters are not in flowing state, and rankine cycle 30A does not move.Therefore, only when from the used heat of motor 10 when recyclable, rankine cycle 30A can move definitely.As a result, waste heat recovery can be carried out effectively, and the specific fuel consumption of vehicle can be improved.
In addition, even when air conditioning is requested, if the temperature of engine cooling water is the abundant temperature that is used for the heating and cooling agent, the time that refrigeration cycle 20A can stop when control unit 40 can be set in motor 10 operation, and this time be used to move rankine cycle 30A.As a result, can carry out waste heat recovery effectively by using used heat utilized device 20.
(second embodiment)
With reference to Figure 10 the second embodiment of the present invention is described.In first embodiment, control unit 40 determines based on the signal of the revolution of motor 10 whether the flow of engine cooling water is abundant amount.Yet in a second embodiment, flow transducer (flow detector) 41 is set among the hot-water return 10A to be used for directly detecting flow.Signal from flow transducer 41 is transfused to control unit 40.In a second embodiment, similar to first embodiment, water pump 12 can be the mechanical pump that is driven by motor 10, perhaps can be by electric motor driven electric pump.
Figure 11 is a flow chart, has shown the control operation according to second embodiment's the used heat utilized device 20 that utilizes control unit 40.Step S110 is identical with among first embodiment those to S130, S150, S170 and S180.
In first embodiment, the step S160 in Fig. 3, it is in service to determine based on the signal of revolution whether motor 10 is in.Yet in a second embodiment, step S165 is used with the step S160 in the alternate figures 3, and as shown in Figure 11, whether step 165 is sufficient amount based on the flow of determining engine cooling water from the signal of flow transducer 41.
Particularly, as shown in Figure 12, the flow of the engine cooling water that detects when flow transducer 41 is increased to the second predetermined amount of flow Qw2 and when above, determines that flow is enough to heating and cooling agent (determined value 1) from the flow less than the second predetermined amount of flow Qw2.On the other hand, when flow was reduced to less than the first predetermined amount of flow Qw1, the wherein said first predetermined amount of flow Qw1 determined that less than the second predetermined amount of flow Qw2 underfed is with heating (determined value 0).In this way, determine to provide hysteresis for flow.The difference of the predetermined amount of flow Qw1 and the second predetermined amount of flow Qw2 can be set at for example 2L/min.
Figure 13 has shown the control procedure in the Rankine that step S145 carries out in Figure 11/air conditioning cooperation control.Step S210 and S230 are identical with among first embodiment those to S260.At step S225, the step S165 among definite and Figure 11 of flow similarly is performed.
As mentioned above, according to second embodiment, flow transducer 41 directly detects the flow of the engine cooling water that is used for definite flow.Therefore, can more suitably determine flow whether be enough to be used in the heating, and rankine cycle 30A can move reach the longer time.
(the 3rd embodiment)
With reference to Figure 14 the third embodiment of the present invention is described.In first and second embodiments, the reduced overall/expansion cell 110 that is formed by a fluid machinery is used as expander and compressor.But, as shown in Figure 14, can use compressor 130 independent of each other and expander 131 as the compression/expansion unit.Compressor 130 and expander 131 be with respect to refrigeration agent stream location abreast, and switch valve 38a and 38b are arranged on the coolant channel that is connected to compressor 130 and expander 131.Used heat utilized device 20 can similarly be controlled by control unit 40 with first embodiment or second embodiment.Yet, when rankine cycle 30A and refrigeration cycle 20A are converted, switch valve 38a and 38b and liquid pump 33 and switch valve 35 controlled unit 40 controls.
(the 4th embodiment)
To Figure 17 the fourth embodiment of the present invention is described with reference to Figure 15.In the 4th embodiment, electric water pump 12a is set up as being used for making engine cooling water at hot-water return 10A circuit pump.
The run signal of the running state of demonstration water pump 12a is transfused to control unit 40 from the controller of motor 10.When water pump 12a is in when in service, control unit 40 determines that the engine cooling water among the hot-water return 10A is in flowing state.When water pump 12a is not in when in service, control unit 40 determines that engine cooling waters are not in flowing state.
With reference to the operation (that is, the control procedure of control unit 40) of the flowchart text among Figure 16 and Figure 17 according to the 4th embodiment's used heat utilized device 20.In the flow chart in Figure 16 and Figure 17, step S166 and S266 are used with step S160 and S220 among alternate figures 3 and Fig. 7 respectively.
When determining that at step S110 air conditioning is not requested (NO) and determines that at step S150 engine cooling water is enough to be used in heating when (YES), proceed to step S166, and the running state of definite water pump 12a.When water pump 12a was in (ON) in service, engine cooling water was in flowing state.Therefore, refrigeration agent can be heated at heater 34 places, and rankine cycle 30A moves at step S170 place.
When water pump 12a did not move (OFF), engine cooling water was not in flowing state.Therefore, refrigeration agent is not heated at heater 34 places, and rankine cycle 30A does not move at step S180 place.
When determining that at step S110 air conditioning is requested (YES) and when step S120 determined that the temperature of engine cooling water is enough to heat, it proceeded to S140, and Rankine/air conditioning cooperation control is performed.In Rankine/air conditioning cooperation control of Figure 17, after step S210 calculates the second target temperature TEO2 at evaporator outlet place, proceed to step S266, and similar, determine the flowing state of engine cooling water based on the running state of water pump 12a to step S166.Then, according to the operation of the refrigeration cycle 20A of the operation of the rankine cycle 30A of definite selection step S240 at step S266 place and step S260.
As mentioned above, in the 4th embodiment, electric water pump is used as water pump 12a.Therefore, can accurately determine the flowing state of engine cooling water according to the running state of water pump 12a.Therefore, can obtain effect among first embodiment.
Control unit is predetermined number of revolutions and can determines that engine cooling water is in flowing state when above at the revolution of water pump 12a, and determines that when revolution is lower than schedule number engine cooling water is not in flowing state.
(the 5th embodiment)
With reference to Figure 18 the fifth embodiment of the present invention is described.Rankine cycle 30A according to the 5th embodiment's used heat utilized device 20 is similar to the 4th embodiment's rankine cycle, but the refrigeration cycle 20A described in the 4th embodiment (Figure 15) is not provided with.Therefore, the air conditioning demand signal is not transfused to control unit 40.
Used heat utilized device 20 mainly comprises rankine cycle 30A.Expander 131 is used with alternative compression/expansion unit 110, and safety check 31a and 32a, switch valve 35 and control valve 36 are not set.Connect expansion valve 131, condenser 21, gas-liquid separator 22, liquid pump 33 and heater 34 in turn to form rankine cycle 30A with the closed-loop path.
By using step S150, S166, S170, the S180 in the flow chart among Figure 16, the operation of control unit 40 control rankine cycle 30A.According to the temperature of engine cooling water and the flowing state operation rankine cycle 30A of engine cooling water.Therefore, used heat can be reclaimed effectively.
(the 6th embodiment)
To Figure 21 the sixth embodiment of the present invention is described with reference to Figure 19.In the 6th embodiment, refrigeration cycle 20B is added to the used heat utilized device 20 according to the 5th embodiment.Refrigeration cycle 20B has the compressor 130 that is used for self, and use and shared condenser 21 and the gas-liquid separator 22 of rankine cycle.
The branched bottom 25 that is arranged among the rankine cycle 30A by use is formed as follows refrigeration cycle 20B.That is, branched bottom 25 forms the liquid gas outlet side branch from gas-liquid separator 22, and is connected to the some D between expander 131 and condenser 21.In branched bottom 25, decompression machine 23 sequentially is set, vaporizer 24 and compressor 130.Thereby compressor 130, condenser 21, gas-liquid separator 22, decompression machine 23 and vaporizer sequentially are connected in the loop, are used to form refrigeration cycle 20B.
Because refrigeration cycle 20B comprises personal compressor 130, so refrigeration cycle 20B can be independent of rankine cycle 30A operation.That is, in used heat utilized device 20, can carry out the isolated operation of blue many circulations 30A, operation in the time of the isolated operation of refrigeration cycle 20B and rankine cycle 30A and refrigeration cycle 20B according to the 6th embodiment.
With reference to the control operation of Figure 20 explanation according to the used heat utilized device 20 of the 6th embodiment's control unit 40.In the flow chart in Figure 20, step S121 is added in the flow chart among the Figure 16 described in the 4th embodiment, and step S131, S141, S171 and S181 are used to substitute step S130, S140, S170 and the S180 among Figure 16 respectively.
At first, determine whether to exist air conditioning request at step S110 from the passenger.When determining not have air conditioning request (NO), proceed to step S150, and whether be enough in heater 34 places heating and cooling agent based on the temperature of determining engine cooling water from the signal of temperature transducer 14.
When the temperature of determining engine cooling water is enough to heating (YES), proceeds to step S166, and determine the flowing state of engine cooling water based on the operation of water pump 12a.When determining that at step S166 engine cooling water is in flowing state (YES), proceed to step S171, and carry out the isolated operation (control separately) (that is, refrigeration cycle 20B does not move) of rankine cycle 30A.
When determining that at step S150 the temperature of engine cooling water is not enough to heating (NO), perhaps when determining that at step S166 water pump 12a is not in running state (OFF) and engine cooling water and is not in flowing state, proceed to step S181, and rankine cycle 30A or refrigeration cycle 20B do not move.
When the air conditioning request (YES) that determine to exist at step S110 from the passenger, proceed to step S120, and whether the temperature of definite engine cooling water is enough in heater 34 places heating and cooling agent.
When the temperature at step S120 engine cooling water is not enough to heating (NO), proceed to step S131, carry out air conditioning isolated operation (normal air is regulated control), and only carry out refrigeration cycle 20B (that is, rankine cycle 30A does not move).
Yet, when determining that at step S120 the temperature of engine cooling water is enough to heating (YES), proceed to step S121, and determine the flowing state of engine cooling water based on the running state of water pump 12a.When definite engine cooling water is not in flowing state (NO), proceeds to step S131, and carry out air conditioning and operate separately.On the other hand, when definite engine cooling water is in flowing state (YES), proceed to step S141, carry out Rankine/air conditioning and move (operation control simultaneously) simultaneously, and rankine cycle 30A and refrigeration cycle 20B are side by side moved.
Figure 21 has shown Rankine/air conditioning relation between the heat loss amount of the revolution of cooling capacity, the expander 131 of operating needs and condenser 21 simultaneously.
Simultaneously in service in Rankine/air conditioning, the revolution of the expander 131 of control unit 40 control rankine cycle 30A is so that the heat loss amount at condenser 21 places is no more than its thermal loss ability.That is, control unit 40 is determined the thermal loss ability at condenser 21 places shown in dotted line A among Figure 21 according to the size of the flow rate of the external air temperature of the heat exchange part that flows into condenser 21, outside air and condenser 21.
When refrigeration 20B when operation, need be corresponding at the thermal loss of the heat of the cooled dose of absorption in vaporizer 24 places and the heat that receives from compression at compressor 130 places, to provide air conditioning needed cooling capacity at condenser 21 places.As by Figure 21 center line B with the refrigeration cycle heat loss amount shown in the lower area (first heat loss amount), control unit 40 is determined the heat loss amount of condensers 21.
When rankine cycle 30A moves, need be used to cool off the thermal loss of the refrigeration agent that flows from expander 131 with condensation at condenser 21 places.As by the rankine cycle heat loss amount (second heat loss amount) shown in the last zone more than Figure 21 center line B, control unit 40 is determined heat loss amounts.Rankine cycle heat loss amount is proportional, promptly proportional with the revolution of the expander 131 shown in Figure 21 with the flow of the refrigeration agent that flows into condenser 21.
Therefore, when execution Rankine/air conditioning moved simultaneously, the revolution of control unit 40 control expanders 131 was so that the thermal loss ability of the no more than condenser 21 of heat loss amount's sum of the heat loss amount of refrigeration cycle 20B and rankine cycle 30A.That is, when the cooling capacity of the needs of refrigeration cycle 20B when being low, the revolution of expander 131 increases, and the recovered energy of rankine cycle 30A (generated energy) increases.On the other hand, when the cooling capacity of the needs of refrigeration cycle 20B when being high, the revolution of expander 131 reduces, and the driving force that is used for reclaiming (generated energy) of rankine cycle 30A reduces.
As mentioned above, according to a sixth embodiment of the invention, provide refrigeration cycle 20B, described refrigeration cycle 20B has personal compressor 130 and uses and shared condenser 21 and the gas-liquid separator 22 of rankine cycle 30A.Therefore, can optionally carry out the Rankine isolated operation, air conditioning isolated operation and Rankine/air conditioning move simultaneously.Carry out rankine cycle 30A according to the temperature of engine cooling water and the flowing state of engine cooling water.Therefore, used heat can be reclaimed effectively.
When Rankine/air conditioning moves when being performed simultaneously, the revolution of control unit 40 control expanders 131 is so that the thermal loss ability of the no more than condenser 21 of heat loss amount's sum of the heat loss amount of refrigeration cycle 20B and rankine cycle 30A.Therefore, the cooling capacity that can need by refrigeration cycle 20B and reclaim used heat effectively and do not interrupt the thermal loss function of condenser 21 by rankine cycle 30A.
(the 7th embodiment)
With reference to Figure 22 the seventh embodiment of the present invention is described.Similar according to the 7th embodiment's used heat utilized device 20 and the 6th embodiment, but mechanical water pump 12 is used substituting electric water pump 12a, and speed probe 15 is added to motor 10.Water pump 12 and speed probe 15 are similar among first embodiment those.
According to the 7th embodiment, based on determining of the running state of carrying out motor 10 from the signal of turn-sensitive device 15, rather than the determining of flowing state of the engine cooling water of step S121 and S166 among the Figure 20 described in the 6th embodiment.Therefore, can obtain the effect described in the 6th embodiment.
(the 8th embodiment)
To utilize Figure 23 that the eighth embodiment of the present invention is described.In used heat utilized device 20, do not provide the refrigeration cycle 20B among the 7th embodiment, yet the other parts of used heat utilized device 20 are similar among above-mentioned the 7th embodiment those according to the 8th embodiment.Can make according to the 8th embodiment's used heat utilized device 20 similarly to the 5th embodiment's (Figure 18) used heat utilized device, but mechanical water pump 12 is used to substitute the electric water pump 12a among the 5th embodiment.
The temperature of the engine cooling water that obtains according to temperature transducer 14 and the running state (flowing state of engine cooling water) of the motor 10 that speed probe 15 obtains are by control unit 40 operation rankine cycle 30A.Therefore, can reclaim used heat effectively.
(other embodiment)
Contact has illustrated the present invention fully with reference to the preferred embodiments of the present invention of accompanying drawing, please notes for those of ordinary skills, and various changes and modification will become clear.
For example, according to above-mentioned the first, the 3rd, the 7th and the 8th embodiment, the running state of motor 10 is determined based on the revolution of the motor 10 that is detected by speed probe 15.Yet,, can use for example suction pressure of motor 10 and the opening degree of suction throttle valve as substituting of the revolution of motor 10.
According to above-mentioned second embodiment, flow transducer 41 is between motor 10 and heater 34.Yet flow transducer 41 can be near the engine cooling water outlet side of heater 34, and can detect the accurate flowing state of the waste fluid at heater 34 places with this, and does not have the influence of delay of the response time of flow transducer 41.
In the above-described embodiments, the cooling water of motor 10 is used as the waste fluid of heat engine.Yet waste gas can directly be used as waste fluid.
In addition, in the above-described embodiments, rankine cycle 30A and used heat utilized device 20 are used to hybrid vehicle.Yet they can be used for the idle stop vehicle that motor 10 moves and stops according to vehicle running state.In addition, they can be used to comprise the conventional vehicles of motor 10.
This change and modification should be understood in the scope of the present invention that claim limits.
Claims (36)
1. a used heat utilized device (20) comprising:
Rankine cycle (30A), operating fluid circulates in described rankine cycle, and described rankine cycle comprises:
Heater (34), described heater (34) uses the waste fluid heating operation fluid that has from the used heat of heat engine (10);
Expander (110,131), the operating fluid of described expander (110,131) expansion heating is to reclaim mechanical energy; With
Condenser (21), described condenser (21) are used to cool off the operating fluid that expands with condensation; With
Control unit (40), the operation of described control unit (40) control rankine cycle (30A), wherein:
When the waste fluid temperature be not less than predetermined temperature (Tw1, Tw2) and when waste fluid is in flowing state in heat engine (10), described control unit (40) operation rankine cycle (30A).
2. used heat utilized device according to claim 1 (20), wherein:
Described control unit (40) setting predetermined temperature (Tw1, Tw2), to have hysteresis by utilizing first predetermined temperature (Tw1) and comparing high second predetermined temperature (Tw2) of first predetermined temperature (Tw1).
3. used heat utilized device according to claim 1 and 2 (20), wherein:
Described control unit (40) is determined the flowing state of waste fluid based on the running state of heat engine (10).
4. used heat utilized device according to claim 3 (20) further comprises:
Revolution detector (15), described revolution detector (15) is used to detect the revolution of heat engine (10), wherein:
Described control unit (40) is determined the running state of heat engine (10) based on the revolution that detects.
5. used heat utilized device according to claim 1 and 2 (20), wherein:
Described waste fluid is the cooling water that is used for heat of cooling force engine (10); With
Described rankine cycle (30A) further comprises mechanical pump (12), and described mechanical pump (12) is driven cooling water is delivered to heater (34) by heat engine (10).
6. used heat utilized device according to claim 1 and 2 (20) further comprises:
Flow detector (41), described flow detector (41) is used to detect the flow of waste fluid, wherein:
(Qw1, in the time of Qw2), described control unit (40) determines that waste fluid is in the flowing state when flow is no less than predetermined amount of flow.
7. used heat utilized device according to claim 6 (20), wherein:
Described control unit (40) set predetermined amount of flow (Qw1, Qw2), with by utilizing first predetermined amount of flow (Qw1) and having hysteresis greater than second flow (Qw2) of first predetermined amount of flow (Qw1).
8. used heat utilized device according to claim 7 (20), wherein:
Described second predetermined amount of flow (Qw2) is set to than the high approximately 2L/min of first predetermined amount of flow (Qw1).
9. used heat utilized device according to claim 6 (20), wherein:
Described flow detector (41) is set to the waste fluid outlet side adjacent to heater (34).
10. used heat utilized device according to claim 1 and 2 (20) further comprises:
Motor-drive pump (12a), described motor-drive pump (12a) are used to make waste fluid to be recycled to heater (34), wherein:
Described control unit (40) is determined the flowing state of waste fluid based on the running state of motor-drive pump (12a).
11. used heat utilized device according to claim 1 and 2 (20) further comprises:
Refrigeration cycle (20A), described refrigeration cycle (20A) has compressor (110,130), described compressor (110,130) is used at refrigeration cycle (20A) compression and discharging refrigerant, compressor (110,130) be configured to also as expander (110,131), perhaps be arranged to and be parallel to expander (110,131), wherein:
Described condenser (21) is shared in refrigeration cycle (20A) and rankine cycle (30A);
When the operation that requires refrigeration cycle (20A) and waste fluid temperature be not less than predetermined temperature (Tw1, in the time of Tw2), the operation of described control unit (40) control compressor (110,130); With
When compressor (110,130) when not moving, described control unit (40) operation rankine cycle (30A).
12. used heat utilized device according to claim 11 (20), wherein:
When control unit (40) operation compressor (110,130), described control unit (40) increases the discharge capacity of compressor (110,130), so that the cooling capacity of refrigeration cycle (20A) is no less than the cooling capacity of needs.
13. used heat utilized device according to claim 12 (20), wherein:
Described control unit (40) increases compressor (110,130) discharge capacity, so that the waste fluid temperature that the vaporizer (24) of refrigeration cycle (20A) is located or become second target temperature (TEO2) with the temperature of the other parts of waste fluid temperature correlation, described second target temperature (TEO2) is lower than first target temperature, the cooling capacity of satisfying the demand.
14. used heat utilized device according to claim 13 (20), wherein:
Described control unit is set second target temperature (TEO2) for spending than first target temperature (TEO1) low about 1 to 5.
15. used heat utilized device according to claim 1 and 2 (20) further comprises:
Refrigeration cycle (20A), described refrigeration cycle (20A) has compressor (130), described compressor (130) is used at refrigeration cycle (20A) discharging refrigerant, described refrigeration cycle (20A) is used and the shared condenser (21) of rankine cycle (30A), and be independent of rankine cycle (30A) control by control unit (40), wherein:
Described control unit (40) running refrigerating circulation side by side (20A) and rankine cycle (30A), when requiring refrigeration cycle (20A) operation, the waste fluid temperature is no less than predetermined temperature, and (Tw1, Tw2), and waste fluid is in flowing state.
16. used heat utilized device according to claim 15 (20), wherein:
The revolution of described control unit (40) control expander (131) is so that needed first heat loss amount of operating fluid that condensation is discharged from compressor (130) and be used for the thermal loss ability of the condensation of the needed no more than condenser of second heat loss amount's sum of operating fluid (21) that condensation flows out from expander (131).
17. used heat utilized device according to claim 1 and 2 (20), wherein:
Described heat engine (10) is the internal-combustion engine (10) that is used for vehicle.
18. used heat utilized device according to claim 17 (20), wherein:
Described vehicle is hybrid vehicle or idle stop vehicle, and wherein internal-combustion engine (10) is according to the operation of the drive condition of vehicle with stop.
19. the controlling method of a used heat utilized device (20), described used heat utilized device (20) comprises rankine cycle (30A), described rankine cycle (30A) utilizes heater to use to have the operating fluid of waste fluid heating in rankine cycle (30A) from the used heat of heat engine (10), utilize expander (110,131) operating fluid of expansion heating is to be used to reclaim mechanical energy, and the operating fluid that utilizes condenser (21) cooling and condensation to expand said method comprising the steps of:
Determine the waste fluid temperature whether be less than predetermined temperature (Tw1, Tw2);
Determine whether waste fluid is in flowing state; With
(Tw1 when Tw2) being in flowing state with waste fluid, moves rankine cycle (30A) when the waste fluid temperature is no less than predetermined temperature.
20. the controlling method of used heat utilized device according to claim 19 (20) further comprises:
Set predetermined temperature (Tw1, Tw2), to have hysteresis by use first predetermined temperature (Tw1) and second predetermined temperature (Tw2) that is higher than first predetermined temperature (Tw1).
21. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
Definite running state based on heat engine (10) of the flowing state of described waste fluid is performed.
22. the controlling method of used heat utilized device according to claim 21 (20), wherein:
The running state of described heat engine (10) is determined based on the revolution of heat engine (10).
23. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
Described waste fluid is the cooling water that is used for heat of cooling force engine (10), and waste fluid is delivered to heater (34) by the mechanical pump (12) that is driven by heat engine (10).
24. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
(Qw1, in the time of Qw2), described waste fluid is defined in the flowing state when the flow of waste fluid is no less than predetermined amount of flow.
25. the controlling method of used heat utilized device according to claim 24 (20) further comprises:
Set predetermined amount of flow (Qw1, Qw2), to have hysteresis by use first predetermined amount of flow (Qw1) with greater than second flow (Qw2) of first predetermined amount of flow (Qw2).
26. the controlling method of used heat utilized device according to claim 25 (20), wherein:
Described second predetermined amount of flow (Qw2) is set to than the about 2L/min of first predetermined amount of flow (Qw1).
27. the controlling method of used heat utilized device according to claim 24 (20) further comprises:
Near the flow of the waste fluid the waste fluid outlet side of detection heater (34).
28. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
The flowing state of described waste fluid based on be used for waste fluid deliver to heater (34) motor-drive pump (12a) running state and determine.
29. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
Described used heat utilized device (20) further comprises refrigeration cycle (20A), described refrigeration cycle (20A) has the compressor (110 that is used to compress with discharging refrigerant, 130), described compressor (110,130) is also as expander (110,131), perhaps be arranged to and be parallel to expander (110,131), wherein refrigeration cycle (20A) and rankine cycle (30A) common condenser (21)
Described method further comprises:
When the operation that requires refrigeration cycle (20A) and waste fluid temperature be no less than predetermined temperature (Tw1, in the time of Tw2), the operation of control compressor (110,130); With
When compressor (110,130) when not moving, operation rankine cycle (30A).
30. the controlling method of used heat utilized device according to claim 29 (20) further comprises:
When compressor (110,130) is moved, increase the discharge capacity of compressor (110,130), so that the cooling capacity of refrigeration cycle (20A) is no less than the cooling capacity of needs.
31. the controlling method of used heat utilized device according to claim 30 (20), wherein:
Increase described compressor (110,130) discharge capacity, so that the waste fluid temperature that the vaporizer (24) of refrigeration cycle (20A) is located or become second target temperature (TEO2), the cooling capacity that described second target temperature (TEO2) is lower than first target temperature and satisfies the demand with the temperature of the other parts of waste fluid temperature correlation.
32. the controlling method of used heat device according to claim 31 (20) further comprises:
Second target temperature (TEO2) is set at than low about 1 to 5 degree of first target temperature.
33. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
Described used heat utilized device (20) comprises refrigeration cycle (20A), described refrigeration cycle (20A) has the compressor (130) that is used at refrigeration cycle (20A) compression and discharging refrigerant, described refrigeration cycle (20A) is used condenser (21) jointly with rankine cycle (30A), and be independent of rankine cycle (30A) control by control unit (40)
Described method further comprises:
Running refrigerating circulation side by side (20A) and rankine cycle (30A), when requiring refrigeration cycle (20A) operation, the waste fluid temperature is no less than predetermined temperature, and (Tw1, Tw2), and waste fluid is in flowing state.
34. the controlling method of used heat utilized device according to claim 33 (20) further comprises:
The revolution of control expander (131) is so that the thermal loss ability of the no more than condensation at condenser (21) of the needed second heat loss amount's sum of operating fluid that needed first heat loss amount of operating fluid that condensation is discharged from compressor (130) and condensation are flowed out from expander (131).
35. according to the controlling method of claim 19 or 20 described used heat utilized devices (20), wherein:
Described heat engine (10) is the internal-combustion engine (10) that is used for vehicle.
36. the controlling method of used heat utilized device according to claim 35 (20), wherein:
Described vehicle is hybrid vehicle or idle stop vehicle, and wherein internal-combustion engine (10) is according to the operation of the travelling state of vehicle with stop.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
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| JP2006-115924 | 2006-04-19 | ||
| JP2006115924 | 2006-04-19 | ||
| JP2006115924 | 2006-04-19 | ||
| JP2007029566 | 2007-02-08 | ||
| JP2007-029566 | 2007-02-08 | ||
| JP2007029566A JP4823936B2 (en) | 2006-04-19 | 2007-02-08 | Waste heat utilization apparatus and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101059084A true CN101059084A (en) | 2007-10-24 |
| CN101059084B CN101059084B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100966642A Expired - Fee Related CN101059084B (en) | 2006-04-19 | 2007-04-19 | Waste heat utilization device and control method thereof |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20070245737A1 (en) |
| JP (1) | JP4823936B2 (en) |
| CN (1) | CN101059084B (en) |
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- 2007-04-16 US US11/787,449 patent/US20070245737A1/en not_active Abandoned
- 2007-04-19 CN CN2007100966642A patent/CN101059084B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4823936B2 (en) | 2011-11-24 |
| JP2007309312A (en) | 2007-11-29 |
| US20070245737A1 (en) | 2007-10-25 |
| CN101059084B (en) | 2010-05-26 |
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