JP6394472B2 - Heat pump type steam generator and operation method of heat pump type steam generator - Google Patents

Description

  The present invention relates to a heat pump steam generator that recovers heat from heat source hot water and generates steam, and an operation method of the heat pump steam generator.

As one of the steam generators, there is a heat pump steam generator that recovers heat from waste water (heat source hot water) such as factory effluent and used cooling water to generate steam. In the heat pump steam generator, the evaporator of the heat pump unit functions as an exhaust heat recovery device, where heat is recovered from the heat source hot water into the refrigerant, and the water to be heated is heated by the condenser using the recovered heat. Since steam is generated, there is an advantage that the running cost and CO ₂ emission amount can be reduced as compared with the combustion system steam generating apparatus that generates steam using boiler equipment or the like.

  For example, Patent Document 1 discloses a heat pump steam generator that detects the pressure of steam generated by a condenser and controls the compressor so that the detected value becomes a preset value.

JP 2012-42205 A

  By the way, in the structure of patent document 1, since a compressor is controlled based on the pressure of the vapor | steam produced | generated, the heating output of a heat pump part cannot be controlled to a desired value. For this reason, for example, while maintaining the pressure of the generated steam to be constant, it is difficult to perform operation control because it is difficult to perform operation control such as increasing or decreasing the heating output of the heat pump unit to increase or decrease only the flow rate of the steam. is there. For example, even when the temperature of the heat source hot water introduced into the evaporator is lowered, the heating output of the heat pump unit cannot be adjusted independently to flexibly cope with the temperature drop of the heat source hot water. There is also a problem that it is difficult to operate stably.

  The present invention has been made in consideration of the above-described problems of the prior art, and can control the heating output in the heat pump unit to a desired value, and can perform an efficient and stable operation, It aims at providing the operating method of this heat pump type steam generating device.

  A heat pump steam generator according to the present invention includes a compressor that compresses a refrigerant, a condenser that condenses the refrigerant compressed by the compressor, an expansion mechanism that decompresses the refrigerant that has exited the condenser, and heat from hot water. A heat pump unit that annularly connects an evaporator that collects and evaporates the refrigerant, a hot water supply unit that supplies the heat source hot water to the evaporator, and supplies water to be heated to the condenser. A heat pump type steam generating device comprising a steam generating unit that generates steam by heating with a refrigerant, the difference between the specific enthalpy of the refrigerant on the compressor discharge side and the specific enthalpy of the refrigerant on the inlet side of the expansion mechanism, and Control means for calculating the heating output of the heat pump unit based on the refrigerant circulation amount of the heat pump unit and controlling the compressor so that the calculated heating output becomes a set output. The features.

  In addition, the operation method of the heat pump steam generator according to the present invention includes a compressor, a condenser, an expansion mechanism, and an evaporator connected in a ring shape, and recovers heat from hot water using a heat pump unit in which a refrigerant flows. A heat pump type steam generator that generates steam by transferring the heat to the water to be heated, the difference between the specific enthalpy of the refrigerant on the discharge side of the compressor and the specific enthalpy of the refrigerant on the inlet side of the expansion mechanism The heating output of the heat pump unit is calculated based on the refrigerant circulation amount of the heat pump unit, and the compressor is controlled so that the calculated heating output becomes a set output.

  According to such a configuration and method, the heating output of the heat pump unit can be controlled to a desired value separately from the steam pressure and the like in the steam generation unit. For this reason, for example, even when the operation state of the heat pump section is changed due to temperature fluctuation of the heat source hot water, an efficient operation can be performed while maintaining a desired heating output, and the output can be stabilized.

  The refrigerant specific enthalpy on the compressor discharge side is calculated from the refrigerant pressure and temperature on the compressor discharge side, and the refrigerant specific enthalpy on the expansion mechanism inlet side is calculated based on the refrigerant pressure on the compressor discharge side and the temperature If it is set as the structure calculated from the temperature of the refrigerant | coolant in an expander inlet, the heating output of a heat pump part can be calculated accurately.

  The refrigerant circulation amount of the heat pump unit may be calculated from the refrigerant density on the compressor suction side, the excluded volume per unit time of the compressor, and the volume efficiency of the compressor.

  The refrigerant density on the compressor suction side may be calculated from the refrigerant pressure and temperature on the compressor suction side.

  The heat pump unit may include a heater between an outlet of the condenser and an inlet of the expansion mechanism, and the water to be heated may be supplied to the condenser after being heated by the heater.

  According to the present invention, the heating output of the heat pump unit can be controlled to a desired value separately from the steam pressure and the like in the steam generation unit. For this reason, for example, even when the operation state of the heat pump section is changed due to temperature fluctuation of the heat source hot water, an efficient operation can be performed while maintaining a desired heating output, and the output can be stabilized.

It is a whole lineblock diagram of the heat pump type steam generating device concerning one embodiment of the present invention. It is a block diagram which shows the structure of the control system of the heat pump part by a control part. It is a flowchart which shows one procedure of the control method of the heating output of the heat pump part by a control part. It is a flowchart which shows one procedure of the heating output present value calculation process which is a subroutine of step S1 in FIG. It is a figure which shows an example of the ph diagram which shows the refrigerating cycle in a heat pump part.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a heat pump type steam generator according to the present invention will be described in detail with reference to the accompanying drawings by exemplifying a preferred embodiment of the operation control method thereof.

  FIG. 1 is an overall configuration diagram of a heat pump steam generator 10 according to an embodiment of the present invention. The heat pump steam generator 10 is a system that recovers exhaust heat from hot water such as factory waste water and generates steam using the recovered exhaust heat. The generated steam is external steam such as a drying device or a sterilizer. Sent to the use facility.

  As shown in FIG. 1, the heat pump steam generating device 10 generates heat by evaporating water to generate water vapor, and heat is generated from the hot water (heat source hot water) supplied by the hot water supply unit 14 and the hot water supply unit 14. And a heat pump unit 16 that supplies this heat as a heat source for generating steam in the steam generation unit 12, and a control unit 18 that controls the system.

  The heat pump unit 16 collects heat from the hot water, the compressor 20 that compresses the refrigerant, the condenser 22 that condenses the refrigerant compressed by the compressor 20, the expansion mechanism 24 that decompresses the refrigerant that has exited the condenser 22, and Thus, the evaporator 26 that evaporates the refrigerant is connected in a ring shape to circulate the refrigerant. In the present embodiment, a heater 28 is connected between the outlet side of the condenser 22 and the inlet side of the expansion mechanism 24. The expansion mechanism 24 is, for example, an electronic expansion valve.

  The refrigerant that has been compressed by the compressor 20 to a high temperature and high pressure is cooled and condensed by exchanging heat with the water circulating in the steam generation unit 12 in the condenser 22. The refrigerant that has exited the condenser 22 is preheated with water flowing through the water supply path 30 by the heater 28 and further cooled, and then adiabatic expansion is performed by the expansion mechanism 24, and the hot water path 32 of the hot water supply unit 14 is expanded by the evaporator 26. It absorbs heat from the flowing hot water, evaporates and returns to the compressor 20.

  The refrigerant path of the heat pump unit 16 includes a suction pressure sensor 34 and a suction temperature sensor 35 that respectively detect the pressure and temperature of the refrigerant on the suction side of the compressor 20, and a pressure and temperature of the refrigerant on the discharge side of the compressor 20, respectively. A discharge pressure sensor 36 and a discharge temperature sensor 37 for detecting, and an inlet temperature sensor 38 for detecting the temperature of the refrigerant on the inlet side of the expansion mechanism 24 are provided. The operation speed of the compressor 20 is controlled through an inverter (INV) 40 based on the detection values of the sensors 34 to 38 under the control of the control unit 18.

  The steam generation unit 12 uses a refrigerant circulating in the heat pump unit 16 as a heat source to evaporate water to generate steam, and a vapor-liquid two-phase flow including water and steam generated by the condenser 22 A water vapor separator 42 that separates into water, a steam supply path 44 that supplies the steam separated by the water vapor separator 42 to an external steam utilization facility, and water that is separated by the water vapor separator 42 is supplied from the water supply path 30. And a water circulation path 46 that joins the water to be led from the condenser 22 to the water vapor separator 42.

  The water vapor separator 42 is formed of a cylindrical container along the vertical direction, and stores water inside the container by supplying water from the water supply path 30 connected to the water circulation path 46 connected to the lower end wall. . In the water supply path 30, water (water supply) from a water pipe or a water tank (not shown) is introduced to the water circulation path 46 through the heater 28 by the water supply pump 48. Under the control of the control unit 18, the feed water pump 48 is operated at its rotational speed via an inverter (INV) 52 based on a detection value (water level) of a water level sensor 50 that measures the water level of water stored in the water vapor separator 42. Is controlled. Connected to the water vapor separator 42 is a pressure relief valve 54 that is opened when the internal vapor pressure exceeds a predetermined pressure.

  The water circulation path 46 includes a liquid pipe 46 a that communicates from the lower end wall of the water vapor separator 42 to the condenser 22, and a vapor pipe 46 b that communicates from the condenser 22 to the upper side wall of the water vapor separator 42. Water flows through the liquid pipe 46a, and a gas-liquid two-phase flow containing water and steam flows through the steam pipe 46b. A circulation pump 56 is provided in the liquid pipe 46a. The operation speed of the circulation pump 56 is controlled through an inverter (INV) 58 under the control of the control unit 18.

  The steam supply path 44 is a path that is connected to the upper end wall of the water vapor separator 42 and is supplied into the water vapor separator 42 from the steam pipe 46b, where the steam after the water is separated is sent out to the outside. The steam supply path 44 is provided with a pressure adjustment valve (steam pressure adjusting means) 60 for adjusting the pressure of the flowing steam. The pressure adjustment valve 60 is adjusted in opening degree based on the vapor pressure in the water vapor separator 42 measured by the pressure sensor 62 under the control of the control unit 18. By appropriately adjusting the opening degree of the pressure regulating valve 60, the flow rate and pressure of the steam sent out from the heat pump steam generating device 10 can be controlled. As the steam pressure adjusting means for adjusting the pressure of the steam flowing through the steam supply path 44, a steam compressor that compresses steam instead of or together with the pressure adjusting valve 60 may be used.

  The control unit (control unit) 18 is a control device that controls the heating output of the heat pump unit 16 by controlling the operation of the compressor 20 based on the detection values of the sensors 34 to 38. The control unit 18 may further control the feed water pump 48, the circulation pump 56, and the pressure regulating valve 60, but the steam generation unit 12 side may be controlled by another control unit (not shown).

  FIG. 2 is a block diagram illustrating a configuration of a control system of the heat pump unit 16 by the control unit 18. As shown in FIG. 2, the control unit 18 includes a heating output calculation unit 64, a heating output comparison unit 66, a storage unit 68, and a compressor operation control unit 70, and the detected pressures of the sensors 34 to 38 and Operation control of the compressor 20 is performed based on the detected temperature.

  The heating output calculation unit 64 sequentially calculates the heating output (heating output current value) of the heat pump unit 16 during operation of the heat pump steam generation device 10 and transmits the calculation result to the heating output comparison unit 66.

  The storage unit 68 stores a preset value (set output) of the heating output of the heat pump unit 16 set in advance by experiments or the like. This set value is, for example, an optimum heating output necessary for generating steam to be used in an external steam utilization facility, and an optimum temperature according to the temperature and flow rate of the hot raw hot water supplied to the evaporator 26 by the hot water supply unit 14. The heating output is calculated in advance by experiments or the like, and is set as, for example, a mathematical expression or table data.

  The heating output comparison unit 66 compares the current value of the heating output calculated by the heating output calculation unit 64 with the setting value of the heating output set in the storage unit 68, and the comparison result is compared with the compressor operation control unit 70. Send to.

  The compressor operation control unit 70 controls the operation rotational speed of the compressor 20 via the inverter 40 based on the comparison result between the current value of the heating output transmitted from the heating output comparison unit 66 and the set value. Specifically, the compressor operation control unit 70 reduces the operation rotational speed of the compressor 20 based on the comparison result between the current value of the heating output and the set value, for example, when the current value is larger than the set value. When the value is less than the set value, the operation speed of the compressor 20 is increased, and when the current value is within an error range that is considered to be the same as or the same as the set value, the operation speed of the compressor 20 is maintained. Thereby, the control unit 18 controls the operation rotational speed of the compressor 20 so that the heating output of the heat pump unit 16 becomes a predetermined setting output stored in the storage unit 68.

  Next, an operation method of the heat pump type steam generator 10 configured as described above will be described.

  FIG. 3 is a flowchart showing one procedure of a method for controlling the heating output of the heat pump unit 16 by the control unit 18.

  During the steady operation of the heat pump steam generator 10, the heat pump unit 16 recovers the heat of hot water flowing through the hot water path 32 of the hot water supply unit 14 into the refrigerant by the evaporator 26, and the heat recovered in the refrigerant is vaporized by the condenser 22. It moves to the water flowing through the water supply path 30 of the generator 12 to generate steam. Thereby, exhaust heat is efficiently recovered and used, and high energy saving performance is exhibited.

  During the operation of the heat pump type steam generator 10, the control unit 18 controls the operation rotation speed of the compressor 20 by the control method shown in FIG. 3, and controls the heating output of the heat pump unit 16 to a predetermined set output. carry out. In this operation method, the heating output current value calculation process is executed in step S1 in FIG. 3 to calculate the current value of the heating output of the heat pump unit 16.

  FIG. 4 is a flowchart showing a procedure of the heating output current value calculation process that is a subroutine of step S1 in FIG. 3, and FIG. 5 is a ph (pressure-enthalpy) showing a refrigeration cycle in the heat pump unit 16. It is a figure which shows an example of a diagram. In FIG. 5, point 1 indicates the refrigerant state at the time of suction of the compressor 20, point 2 indicates the refrigerant state at the time of discharge of the compressor 20, and point 3 ′ indicates the refrigerant state at the outlet of the condenser 22. The point 3 indicates the refrigerant state at the inlet of the expansion mechanism 24, and the point 4 indicates the refrigerant state at the outlet of the expansion mechanism 24.

  First, the heating output (kW) of the heat pump unit 16 is the specific enthalpy difference Δh (kJ / kg) of refrigerant from the discharge of the compressor 20 to the inlet of the expansion mechanism 24 calculated based on the detection values of the sensors 34 to 38. ) And the refrigerant circulation amount m (kg / sec) in the cycle of the heat pump unit 16 is calculated by the heating output calculation unit 64.

  Therefore, in step S11 in FIG. 4, the control unit 18 acquires detection values by the suction pressure sensor 34, the suction temperature sensor 35, the discharge pressure sensor 36, the discharge temperature sensor 37, and the inlet temperature sensor 38. That is, in step S11, the refrigerant pressure (intake refrigerant pressure P1) and temperature (intake refrigerant temperature T1) on the suction side of the compressor 20 and the refrigerant pressure (discharge refrigerant pressure P2) on the discharge side of the compressor 20 shown in FIG. And the temperature (discharge refrigerant temperature T2) and the inlet temperature (inlet temperature T3) of the expansion mechanism 24 are acquired.

  First, in order to calculate the specific enthalpy difference Δh, in step S12, the compressor discharge specific enthalpy h2 is calculated from the discharge refrigerant pressure P2 and the discharge refrigerant temperature T2 acquired in step S11, and the discharge refrigerant pressure P2 and the inlet temperature T3. Then, the expansion mechanism inlet specific enthalpy h3 is calculated. In this embodiment, it is assumed that the pressure loss of the refrigerant from the discharge of the compressor 20 to the inlet of the expansion mechanism 24 is small and can be ignored, and the pressure difference between the discharge refrigerant pressure P2 of the compressor 20 and the inlet refrigerant pressure of the expansion mechanism 24 is ignored. However, if the pressure loss is large, a pressure sensor is also provided at the inlet of the expansion mechanism 24, and the expansion mechanism inlet specific enthalpy h3 is calculated from the inlet refrigerant pressure of the expansion mechanism 24 and the inlet refrigerant temperature of the expansion mechanism 24. May be.

  Subsequently, in step S13, the specific enthalpy difference Δh of the refrigerant from the discharge of the compressor 20 to the inlet of the expansion mechanism 24 is calculated by subtracting the expansion mechanism inlet ratio enthalpy h3 from the compressor discharge ratio enthalpy h2 calculated in step S12. To do.

  Next, in order to calculate the refrigerant circulation amount m, in step S14, the intake refrigerant density ρ (= ρ (P1, T1) of the compressor 20 is calculated from the intake refrigerant pressure P1 and the intake refrigerant temperature T1 acquired in step S11. That is, the density, which is a physical property value specific to the refrigerant used in the heat pump unit 16, is calculated from the suction refrigerant pressure P1 and the suction refrigerant temperature T1 at that time.

  In step S15, the excluded volume V per unit time of the compressor 20 and the volume efficiency η of the compressor 20 are calculated. That is, the excluded volume V per unit time is the compression per unit time obtained based on the excluded volume (catalog value) per rotation of the compressor 20 and the command value to the inverter 40 obtained from the compressor operation control unit 70. It calculates from the rotation speed of the machine 20. Furthermore, the volumetric efficiency η is a characteristic unique to the compressor and can be obtained by catalog data or a characteristic acquisition experiment. Generally, the volume efficiency η is a function of the compression ratio P2 / P1, and thus the acquired characteristic and the measurement of P1 and P2. Calculate from the value (η = η (P2 / P1)).

  Subsequently, in step S16, the refrigerant circulation amount m is calculated as the product of the suction refrigerant density ρ calculated in step S14, the excluded volume V and the volume efficiency η calculated in step S15 (m = ρ × V × η).

  Therefore, in step S17, the current value Q1 of the heating output of the heat pump unit 16 is calculated by obtaining the product of the specific enthalpy difference Δh calculated in step S13 and the refrigerant circulation amount m calculated in step S16 (Q1 = Δh). × m). Thereby, the heating output current value calculation process shown in step S1 in FIG. 3 is completed, and the heating output current value Q1 is obtained. Note that either the calculation of the specific enthalpy difference Δh in steps S12 to S13 and the calculation of the refrigerant circulation amount m in steps S14 to S16 may be performed first, or both may be performed in parallel.

  Returning to FIG. 3, in step S <b> 2, the heating output comparison unit 66 compares the current value Q <b> 1 of the heating output calculated in step S <b> 17 in FIG. 4 with the setting value Q <b> 2 of the heating output stored in the storage unit 68. To do.

  When the current value Q1 is larger than the set value Q2 (Yes in Step S2), the operation rotational speed of the compressor 20 is reduced via the inverter 40 under the control of the compressor operation control unit 70 (Step S3), The operation of the compressor 20 is controlled so that the value Q1 matches the set value Q2, and the process returns to step S1.

  If the current value Q1 is less than or equal to the set value Q2 (No in step S2), it is subsequently determined whether or not the current value Q1 is less than the set value Q2 (step S4). If the current value Q1 is not less than the set value Q2, that is, if it can be determined that the current value Q1 is equal to the set value Q2 or within a predetermined error range (No in step S4), the process is terminated. Then, the process returns to step S1. On the other hand, when the current value Q1 is less than the set value Q2 (Yes in step S4), the operation speed of the compressor 20 is increased via the inverter 40 under the control of the compressor operation control unit 70 (step S5). Then, the operation of the compressor 20 is controlled so that the current value Q1 matches the set value Q2, and the process returns to step S1.

  Therefore, in the heat pump type steam generator 10, the control method for adjusting the operation rotational speed of the compressor 20 so as to match the current value Q1 of the heating output with the set value Q2 as described above is repeatedly executed. The heating output can be controlled to a desired value. This heating output control may be performed using PID control or any other feedback control. For example, the control result of the compressor 20 in the compressor operation control unit 70 is fed back to the heating output calculation unit 64, and the next heating is controlled. You may use for calculation of an output.

  As described above, in the heat pump steam generation device 10 according to this embodiment, the difference between the specific enthalpy h2 of the refrigerant on the discharge side of the compressor 20 and the specific enthalpy h3 of the refrigerant on the inlet side of the expansion mechanism 24 (specific enthalpy difference Δh) The heating output (current value Q1) of the heat pump unit 16 is calculated based on the refrigerant circulation amount m of the heat pump unit 16, and the compressor 20 is controlled so that the calculated heating output becomes the set output (set value Q2). A control unit 18 is provided.

  Therefore, in the heat pump steam generation apparatus 10, the heating output of the heat pump unit 16 can be controlled to a desired value separately from the steam pressure and the like in the steam generation unit 12. For this reason, for example, even when the operation state of the heat pump unit 16 changes due to temperature fluctuation of the heat source hot water, an efficient operation that maintains a desired heating output is possible, and the output can be stabilized. That is, for example, when the temperature of the hot water introduced into the evaporator 26 decreases, the heating output of the heat pump unit 16 can be maintained by increasing the operating rotational speed of the compressor 20, and the heat pump type steam generator 10. The operation is stable. In addition, for example, when it is necessary to increase or decrease the steam flow rate while maintaining the steam pressure in the steam generating unit 12, it is possible to cope with this by increasing or decreasing the heating output in the heat pump unit 16. Driving is possible. Thereby, for example, the heating output in an excessive state can be reduced while keeping the vapor pressure constant, and the operating efficiency of the apparatus can be increased.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

  The calculation of the specific enthalpy difference Δh and the refrigerant circulation amount m is not limited to the calculation method according to the present embodiment, but may be estimated from other parameters, or parameters acquired in advance through experiments or the like may be input. In the above embodiment, the inlet temperature T3 of the expansion mechanism 24 is measured by the inlet temperature sensor 38 provided on the inlet side of the expansion mechanism 24. However, in the heat pump unit 16, the inlet temperature of the expansion mechanism 24 hardly fluctuates. For example, the inlet temperature sensor 38 may be omitted, and the inlet temperature acquired in advance by an experiment or the like may be used.

DESCRIPTION OF SYMBOLS 10 Heat pump type steam generator 12 Steam generation part 14 Hot water supply part 16 Heat pump part 18 Control part 20 Compressor 22 Condenser 24 Expansion mechanism 26 Evaporator 28 Heater 30 Water supply path 32 Hot water path 34 Suction pressure sensor 35 Suction temperature sensor 36 Discharge pressure sensor 37 Discharge temperature sensor 38 Inlet temperature sensor 40, 52, 58 Inverter 42 Steam separator 44 Steam supply path 46 Water circulation path 64 Heating output calculator 66 Heating output comparator 68 Storage unit 70 Compressor operation controller

Claims (6)

A compressor that compresses the refrigerant, a condenser that condenses the refrigerant compressed by the compressor, an expansion mechanism that decompresses the refrigerant that exits the condenser, and an evaporator that recovers heat from the heat source hot water and evaporates the refrigerant A heat pump connected to
A hot water supply section for supplying the heat source hot water to the evaporator;
A steam generation unit that supplies heated water to the condenser and heats the heated water with the refrigerant to generate steam;
A heat pump type steam generator comprising:
Calculated from the specific enthalpy of the refrigerant on the compressor discharge side calculated from the pressure and temperature of the refrigerant on the compressor discharge side, the pressure of the refrigerant on the compressor discharge side, and the temperature of the refrigerant on the expander inlet side The heating output of the heat pump unit is calculated based on the difference in specific enthalpy of the refrigerant at the inlet side of the expansion mechanism and the refrigerant circulation amount of the heat pump unit, and the compressor is adjusted so that the calculated heating output becomes a set output. A heat pump type steam generator characterized by comprising control means for controlling. In the heat pump type steam generator according to claim 1 ,
The amount of refrigerant circulating in the heat pump unit is calculated from the density of the refrigerant on the compressor suction side, the excluded volume per unit time of the compressor, and the volume efficiency of the compressor, Steam generator. In the heat pump type steam generator according to claim 2 ,
The heat pump type steam generator according to claim 1, wherein the refrigerant density on the compressor suction side is calculated from the pressure and temperature of the refrigerant on the compressor suction side. In the heat pump type steam generator according to any one of claims 1 to 3 ,
The heat pump unit includes a heater between an outlet of the condenser and an inlet of the expansion mechanism, and the water to be heated is heated by the heater and then supplied to the condenser. Heat pump steam generator. A compressor that compresses the refrigerant, a condenser that condenses the refrigerant compressed by the compressor, an expansion mechanism that decompresses the refrigerant that exits the condenser, and an evaporator that recovers heat from the heat source hot water and evaporates the refrigerant A heat pump connected to
A hot water supply section for supplying the heat source hot water to the evaporator;
The condenser that heats water to be heated by the refrigerant, a vapor path through which a gas-liquid two-phase flow generated by the condenser flows, and a gas-liquid two-phase flow supplied from the vapor path, A water vapor separator that separates the liquid phase, a liquid path through which the liquid phase separated by the water vapor separator is circulated to the condenser, a delivery path that sends the water vapor separated by the water vapor separator to the outside, and the liquid path A steam generation unit having a water supply path connected to supply the heated water by power of a water supply pump;
A heat pump type steam generator comprising:
The heating output of the heat pump unit is calculated based on the difference between the specific enthalpy of the refrigerant on the discharge side of the compressor and the specific enthalpy of the refrigerant on the inlet side of the expansion mechanism, and the refrigerant circulation amount of the heat pump unit, and the calculated heating A heat pump type steam generator characterized by comprising control means for controlling the compressor so that the output becomes a set output and controlling the amount of water supplied by the water supply pump based on the water level of the water vapor separator. A heat pump type in which a compressor, a condenser, an expansion mechanism, and an evaporator are connected in an annular shape, and heat is recovered from hot water using a heat pump unit through which refrigerant flows, and the recovered heat is transmitted to heated water to generate steam. A method of operating a steam generator,
Calculated from the specific enthalpy of the refrigerant on the compressor discharge side calculated from the pressure and temperature of the refrigerant on the compressor discharge side, the pressure of the refrigerant on the compressor discharge side, and the temperature of the refrigerant on the expander inlet side The heating output of the heat pump unit is calculated based on the difference in specific enthalpy of the refrigerant at the inlet side of the expansion mechanism and the refrigerant circulation amount of the heat pump unit, and the compressor is adjusted so that the calculated heating output becomes a set output. An operation method of a heat pump type steam generator characterized by controlling.

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