JP2007278608A - Heat source system and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat source system preventing hindrance of heat transfer performance of a condenser due to over-concentration of cooling water. <P>SOLUTION: The heat source system is provided with the condenser 5 cooling, condensing, and liquefying a coolant compressed by a compressor 3 by the cooling water, a cooling tower 16 spraying the cooling water into outside air to vaporize one part of the cooling water and cooling the cooling water by latent heat of vaporization, a cooling water refill pipe 21 refilling the cooling water so as to compensate the vaporized cooling water, cooling water circulation systems 18, 20, 22 circulating the cooling water between the condenser 5 and the cooling tower 16, and a blow piping 28 and a servo valve 30 discharging the cooling water to the exterior at predetermined intervals. It is characterized by that a control part 26 is provided for operating the servo valve 30 on the basis of a concentration of the cooling water in the condenser 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat source system and a control method thereof, and more particularly to blow control of cooling water.

  Generally, cooling water is used as means for cooling the refrigerant in the condenser provided in the heat source system. The cooling water is cooled by being sprinkled in the outside air in the cooling tower and evaporating a part thereof. Since this cooling water is used by circulating between the condenser and the cooling tower, new cooling water is replenished to supplement the evaporated cooling water. Since the cooling water contains dirt for the heat source system represented by the silica component, the magnesium component, and the calcium component, if new cooling water is continuously supplied according to the evaporation amount, The concentration of silica component and calcium component increases, resulting in overconcentration. When overconcentration occurs, solid scale adheres to the filler of the cooling tower (the surface where air and cooling water come into contact), causing clogging, and the scale adheres to the heat transfer section of the condenser. Further, the generation of slime may cause a significant decrease in heat transfer performance or corrosion. When the scale is hard, it is not easy to remove, and it is difficult to improve the heat transfer performance.

Therefore, a method is known in which circulating cooling water is discharged (blowed) to the outside at predetermined intervals to manage the concentration of cooling water below a certain value (see Patent Document 1).
In patent document 1, the electric conductivity of the cooling water of the cooling water piping on the absorption refrigerator side is measured, and when the concentration obtained from this electric conductivity exceeds a predetermined concentration, the technology of blowing the cooling water is a technique. It is disclosed.

JP 11-63715 A (paragraphs [0004] and [0005] and FIGS. 6 and 7)

  However, in the heat source system, when the concentration of cooling water increases excessively, the most inconvenience occurs, the energy of the heat source system due to the heat transfer performance being reduced due to scale adhesion or slime of the heat transfer section in the condenser. This is a case where efficiency decreases.

  This invention is made in view of such a situation, Comprising: It aims at providing the heat-source system which does not have a possibility that the heat transfer performance of a condenser may be inhibited by the overconcentration of a cooling water, and its control method. To do.

In order to solve the above problems, the heat source system and the control method thereof according to the present invention employ the following means.
That is, the heat source system according to the present invention includes a heat source device having a condenser that cools the refrigerant compressed by the compressor with cooling water to condense and liquefy it, and sprays the cooling water in the outside air to evaporate a part thereof. A cooling tower for cooling the cooling water by latent heat of evaporation; cooling water supply means for supplying cooling water to supplement the reduced cooling water; and circulating the cooling water between the condenser and the cooling tower. In a heat source system comprising a cooling water circulation system and a blowing means for discharging the cooling water to the outside at a predetermined interval, control for operating the blowing means based on the concentration of the cooling water in the condenser It has the part.

The cooling water that has cooled the refrigerant in the condenser is sent to the cooling tower. In the cooling tower, water is sprinkled in the outside air to partially evaporate, and the cooling water is cooled by the latent heat of evaporation. Since a part of the cooling water evaporates in this way, new cooling water is replenished by the replenishing means so as to compensate for the cooling water reduced by the evaporation. When new cooling water is replenished so as to supplement the evaporated cooling water, the concentration of the silica component, calcium component, and magnesium component contained in the cooling water flowing through the cooling water circulation system increases. When the concentration of the silica component, calcium component, and magnesium component rises, a solid scale is generated. Therefore, before the concentration rises excessively, blow is performed at predetermined intervals to discharge the cooling water flowing through the cooling water circulation system to the outside. .
In the present invention, blow of the cooling water flowing through the cooling water circulation system is performed by operating the blowing means based on the concentration of the cooling water in the condenser. Thereby, the possibility that a solid scale may adhere to the heat transfer tube provided in the condenser can be determined most accurately. Therefore, heat transfer inhibition in the condenser can be prevented and good heat transfer can be continued.

  Furthermore, the heat source system of the present invention includes a chemical solution injection means for adding a chemical solution having at least one function among the functions of preventing rust, antiseptic, antibacterial, and solid component precipitation of cooling water, and the control unit includes: The chemical solution injection means is operated based on the chemical concentration of the cooling water in the condenser.

  The chemical solution was injected based on the concentration of the chemical solution of the cooling water in the condenser. Thereby, the possibility that slime adheres to the heat transfer tube provided in the condenser can be most accurately determined. Therefore, heat transfer inhibition in the condenser can be prevented and good heat transfer can be continued.

  Furthermore, the heat source system of the present invention is characterized in that the control unit is provided in the heat source machine.

  By providing the control unit in the heat source unit, the cooling water is not blown by a command on the equipment control panel side of the heat source system such as a cooling tower, but is blown by a command from the heat source unit side. Thereby, the concentration of the cooling water supplied to the condenser of the heat source device can be appropriately maintained, and the heat source device can be operated with high efficiency. Further, in the case of a heat source system having a plurality of heat source units, the concentration of cooling water can be appropriately maintained for each heat source unit, and the efficiency of the entire heat source system can be increased.

  Furthermore, in the heat source system of the present invention, the blowing means includes a cooling water discharge port, and the cooling water discharge port is provided below the condenser.

Generally, the cooling tower is installed on the roof of a building in order to perform heat exchange with the outside air satisfactorily. On the other hand, a heat source machine having a condenser is installed in the basement of the building. Therefore, when considering the cooling water circulation system, the condenser is located at the lowest position. This means that foreign matters such as solid scales caused by the concentration of silica, calcium and the like tend to accumulate downward, so that the concentration of the cooling water becomes higher toward the condenser side. In the cooling water system, the condenser has the highest temperature and microorganism-derived slime tends to accumulate and concentrate on the condenser.
In the present invention, the cooling water discharge port for performing the blow is provided in the condenser having the highest concentration, and the cooling water having the high concentration is efficiently discharged from the lower side to the outside.

  The enrichment may be determined by an electrical conductivity sensor provided in the condenser, or may be determined based on the amount of exchange heat in the condenser. Alternatively, the electrical conductivity sensor and the calculation based on the exchange heat quantity may be combined.

  Furthermore, in the heat source system of the present invention, the blowing by the blowing means is performed when the heat source system is stopped.

  Since the blow is performed when the heat source system is stopped, the cooling water can be discharged after the flow of the cooling water is stopped. If the flow of the cooling water is stopped, the contaminants such as the solid scale and the slime are lowered, and the contaminants can be effectively removed.

  Furthermore, the heat source system of the present invention includes a plurality of the heat source devices, and even if the heat source system is operating, if any of the heat source devices is stopped, the stopped heat source device is given priority. Further, the blowing by the blowing means is performed.

  Since the stopped heat source machine is easier to remove the pollutant, the pollutant is effectively removed by blowing the stopped heat source machine preferentially.

  One blow by the blowing means by the heat source system of the present invention is based on the flow coefficient (CV value) of the blow valve provided in the blowing means and the internal pressure of the cooling water in the condenser, and the holding of the condenser. The blow valve opening time corresponding to the amount of water is determined, and the blow valve opening time is repeated once or a plurality of times.

  Furthermore, in the heat source system of the present invention, a plurality of the heat source devices including the blowing means are provided in the same cooling water circulation system so that the amount of blown water to be discharged does not exceed the supply water supply amount that is the amount of cooling water to be supplied. In addition, there is a restriction on simultaneous blow that simultaneously blows a plurality of the heat source machines, and when the lower limit liquid level of the make-up water tank is below, blow pause control is performed to pause the blow. .

  Furthermore, the heat source system of the present invention is characterized by instructing a control unit of the heat source machine to issue a forced blow control instruction for forcibly blowing from a system control panel of the heat source system, and controlling the blow means. .

  Also, the control method of the heat source system of the present invention includes a heat source device having a condenser that cools the refrigerant compressed by the compressor with cooling water to condense and liquefy it, and sprays the cooling water in the outside air to partially A cooling tower for evaporating and cooling the cooling water by latent heat of evaporation; cooling water supply means for supplying cooling water to compensate for the reduced cooling water; and the cooling water between the condenser and the cooling tower. In a control method of a heat source system comprising a cooling water circulation system to circulate and a blowing means for discharging the cooling water to the outside at a predetermined interval, the blow water is blown based on the concentration of the cooling water in the condenser. The means is operated.

The cooling water that has cooled the refrigerant in the condenser is sent to the cooling tower. In the cooling tower, water is sprinkled in the outside air to partially evaporate, and the cooling water is cooled by the latent heat of evaporation. Since a part of the cooling water evaporates in this way, new cooling water is replenished by the replenishing means so as to compensate for the cooling water reduced by the evaporation. When new cooling water is replenished so as to supplement the evaporated cooling water, the concentration of the silica component, calcium component, and magnesium component contained in the cooling water flowing through the cooling water circulation system increases. When the concentration of the silica component, calcium component, and magnesium component is increased, solid scale is generated. Therefore, before the concentration increases excessively, blow is performed at a predetermined interval and cooled from a blow valve provided around the cooling tower. Cooling water flowing through the water circulation system is discharged to the outside.
In the present invention, blow of the cooling water flowing through the cooling water circulation system is performed by operating the blowing means based on the concentration of the cooling water in the condenser. Thereby, the possibility that a solid scale may adhere to the heat transfer tube provided in the condenser can be determined most accurately. Therefore, heat transfer inhibition in the condenser can be prevented and good heat transfer can be continued.
Further, if the chemical solution is injected based on the concentration of the chemical solution in the condenser where the slime is most likely to be generated, the possibility of slime adhering to the heat transfer tube can be most accurately determined.

  Based on the concentration of the cooling water and the chemical concentration in the condenser, the cooling water was blown and the customer liquid was injected, so there was the greatest risk of solid scale and slime adhering to the heat transfer tubes installed in the condenser. Can be judged accurately. Therefore, heat transfer inhibition in the condenser is prevented, and highly efficient energy saving operation is realized.

Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of a turbo refrigerator (heat source machine) 1.

The turbo refrigerator 1 is used for air conditioning and cold / hot water supply in buildings and factories. The turbo refrigerator 1 includes a turbo compressor 3, a condenser 5, an expansion valve 7, and an evaporator 9.
The turbo refrigerator 1 is disposed in the basement of a building such as a building. On the other hand, the cooling tower 16 for cooling the cooling water supplied to the condenser 5 is arranged on the roof of the building in order to promote heat exchange with the outside air.
A plurality of turbo refrigerators 1 are installed according to the required amount of heat. The cooling tower 16 may be provided corresponding to each turbo chiller 1 or may be provided for each of the plurality of turbo chillers 1.
Thus, a heat source system is comprised by the heat source machine made into the turbo refrigerator, and equipments, such as the cooling tower 16. FIG.

  The turbo compressor 3 includes a centrifugal impeller 10. The impeller 10 is driven by an inverter-equipped electric motor whose frequency is variable or a fixed-revolution electric motor at a system power frequency, whereby the refrigerant is compressed. An inlet guide vane 12 is provided at the suction port of the turbo compressor 3 so that the flow rate of the suction refrigerant is adjusted.

The condenser 5 is connected to the refrigerant discharge side of the turbo compressor 3 and has a role of obtaining the liquid refrigerant L by cooling and condensing the high-temperature and high-pressure refrigerant compressed by the turbo compressor 3.
The refrigerant introduced into the condenser 5 is cooled by exchanging heat with the heat transfer tubes 14 provided in the condenser 5. As shown in FIG. 2, a large number of heat transfer tubes 14 are arranged in the longitudinal direction of the condenser 5. The cooling water flowing in the heat transfer tube 14 is guided from the right side in FIG. 1, and after being collected in the water chamber 15 at the left end in the drawing, the direction of the flow is reversed and is guided to the right side in the drawing.

The cooling water guided to the heat transfer tube 14 is circulated between the cooling tower 16. As described above, the cooling tower 16 is disposed on the roof of a building such as a building. The cooling tower 16 sprinkles the cooling water in the outside air, evaporates a part of the cooling water, and cools the cooling water by its own latent heat of vaporization. A fan 17 is provided above the cooling tower 16, and outside air is taken in by the fan 17 and actively exchanges heat with cooling water.
A cooling water pump 20 is provided in the cooling water forward pipe 18 that connects the cooling water outlet of the cooling tower 16 and the condenser 5. The cooling water pump 20 circulates cooling water between the cooling tower 16 and the condenser 5. A cooling water return pipe 22 is provided between the cooling water outlet of the condenser 5 and the cooling water inlet of the cooling tower 16. A cooling water circulation system is formed by the cooling water return pipe 22 and the cooling water forward pipe 18.

The cooling tower 16 is provided with a cooling water supply pipe (cooling water supply means) 21 for supplying fresh water (tap water) as new cooling water. A supply water tank 21 a is provided on the upstream side of the cooling water supply pipe 21. The replenishing water tank 21a is provided with a float valve 21b, and the amount of water to be replenished is controlled so that a constant liquid level is obtained. Thus, the amount of clean water corresponding to the cooling water evaporated in the cooling tower 16 is supplied from the cooling water supply pipe 21 connected to the supply water tank 21a.
The cooling tower 16 is provided with a chemical solution injection pipe 23 for injecting a chemical solution. As the chemical solution, a dispersant, a rust inhibitor, a preservative, a bactericide, and the like are used. A chemical liquid tank 23b is connected to the chemical liquid injection pipe 23 via a chemical liquid pump 23a. The chemical supply amount to be added is determined by the chemical pump 23a.

An electric conductivity sensor 24 and a chemical concentration sensor 25 are provided in the water chamber 15 in which the cooling water flowing through the condenser 5 is collected. By measuring the electrical conductivity of the cooling water with this electrical conductivity sensor 24, the degree of concentration of the silica component, calcium component, etc. contained in the cooling water is obtained. The output of the electrical conductivity sensor 24 is transmitted to the control unit 26. The chemical concentration sensor 25 can detect the concentration of the injected chemical. The output of the chemical concentration sensor 25 is transmitted to the control unit 26.
The control unit 26 is installed in the vicinity of the main body of the turbo refrigerator 1 including the turbo compressor 3, the condenser 5, and the evaporator 9, and mainly performs operation control of the turbo refrigerator 1. Accordingly, the control unit 26 is provided for each turbo chiller 1 in the case of a heat source system having a plurality of turbo chillers 1.
In the case where one cooling tower is provided in the plurality of turbo chillers 1 or in the case of a complicated heat source system, a system control unit 40 is installed.

  A cooling water discharge port 27 is formed at the bottom of the water chamber 15 of the condenser 5, and the cooling water in the water chamber 15 is discharged to the outside from the blow pipe 28 connected to the cooling water discharge port 27. Is done. The blow pipe 28 is provided with a motor-driven control valve 30, and blow is performed by opening and closing the control valve 30. The opening and closing of the control valve 30 is controlled by the control unit 26. The blow pipe 28 may be an existing drain pipe. The cooling water discharge port 27 is preferably provided at the bottom of the water chamber 15 from the viewpoint of draining water, but may be provided below the side of the water chamber 15.

  An expansion valve 7 is disposed in the refrigerant pipe 32 that connects the condenser 5 and the evaporator 9. The expansion valve 7 expands the refrigerant liquefied in the condenser 5 in an enthalpy manner. The opening degree of the expansion valve 7 is determined by the control unit 26. The liquid refrigerant that has been throttled by the expansion valve 7 to a low pressure is sent to the evaporator 9.

In the evaporator 9, heat exchange is performed between the liquid refrigerant L and the cold water flowing through the cold water heat transfer pipe 34. That is, the liquid refrigerant L in the evaporator 9 is evaporated by removing heat from the cold water flowing through the cold water heat transfer tube 34. The gas refrigerant thus evaporated is guided to the refrigerant suction port of the turbo compressor 3 through the refrigerant suction pipe 36.
The chilled water flowing through the chilled water heat transfer pipe 34 circulates with an external load such as an indoor unit in the building room to perform indoor air conditioning.

The turbo refrigerator 1 having the above-described configuration is operated as follows.
When the centrifugal impeller 10 is rotated at a predetermined rotational speed by the electric motor of the turbo compressor 3, the refrigerant whose flow rate is adjusted by the inlet guide vane 12 is sucked and the refrigerant is compressed. The opening degree of the inlet guide vane 12 and the rotational speed of the electric motor are controlled by the control unit 26.
The compressed refrigerant is sent to the condenser 5 and is liquefied by being cooled by the cooling water flowing in the heat transfer tube 14. The liquid refrigerant L is throttled by the expansion valve 7 and then sent to the evaporator 9.
In the evaporator 9, the cold water flowing through the cold water heat transfer pipe 34 and the refrigerant exchange heat, and the refrigerant is gasified by taking heat from the cold water. The gasified refrigerant is led to the refrigerant suction port of the turbo compressor 3 through the refrigerant suction pipe 36 and is compressed again.
The chilled water that has been cooled by being deprived of heat by the refrigerant is sent to an external load, and is used as cooling for cooling operation or the like.

The cooling water that exchanges heat with the high-temperature and high-pressure refrigerant in the condenser 5 is used as follows.
The cooling water is sent to the heat transfer pipe 14 in the condenser 5 by the cooling water pump 20 through the cooling water forward pipe 18. After the cooling water flowing through the heat transfer pipe 14 is once collected in the water chamber 15, the direction of the flow is changed, the cooling water passes through the heat transfer pipe 14 so as to flow out of the condenser 5, and goes to the cooling water return pipe 22. Led. The cooling water flowing through the cooling water return pipe 22 is guided to the cooling tower 16 installed on the roof of the building. In the cooling tower 16, by being sprinkled in the outside air, heat is exchanged with the outside air, and a part thereof is evaporated. The cooling water is cooled by the latent heat of vaporization and is led to the cooling water outlet pipe 18 again. Water corresponding to the amount reduced by evaporation of a part of the cooling water is supplied from the cooling water supply pipe 21 whose liquid level is controlled. Further, a chemical solution is injected from the chemical solution injection pipe 23 in accordance with the concentration of the chemical solution in the circulating cooling water.

Concentrations of the silica component, the calcium component, the magnesium component, and the like of the circulating cooling water are measured by the electrical conductivity sensor 24. The electrical conductivity sensor 24 is provided in the water chamber 15 of the condenser 5, thereby measuring the concentration at the lowest position in the circulating cooling water. Based on the measured value of the electrical conductivity sensor 24, the concentration in the water chamber 15 is calculated, and when the concentration exceeds the threshold, the cooling water is blown at a predetermined interval. As the concentration threshold, 2 to 10 times is used, and the user can arbitrarily set it.
Further, the chemical concentration sensor 25 is provided in the water chamber 15 of the condenser 5, so that the concentration at the lowest position in the cooling water circulating the chemical concentration in the vicinity of the condenser heat transfer tube 14 where the slime propagates most. Is to measure. It is possible to appropriately monitor the measured value of the chemical solution sensor 25 so that the concentration does not fall below the slime breeding concentration.

The cooling water blow is performed by extracting the cooling water from the cooling water discharge port 27 provided at the bottom of the water chamber 15. The timing of cooling water blow is determined by the control unit 26, and the cooling water blow is performed by opening and closing the control valve 30 provided in the blow pipe 28 according to an instruction from the control unit 26.
The total amount V (m ³ ) of cooling water blow is determined by the following equation.
V = q × T × N (1)
Here, q is a flow rate of cooling water flowing in the blow pipe 28 (m ³ / s), T is a blow time (blow valve opening time) (s) per time, and N is the number of blows.
Q × T on the right side of the equation (1) corresponds to the blow amount per time. This q × T is set so as to correspond to n times the amount of water held in the refrigerator (q × T = n × v). Here, since the retained water volume v is uniquely determined by the physique of the refrigerator, the user arbitrarily determines how many times the retained water volume v is to be blown, and corresponds to this water volume. One blow time T can be set.
The flow rate q is determined by the water pressure in the water chamber 15 and the cv value (flow rate coefficient) of the control valve 30 and is given as a function of pressure. For example, during operation of the refrigerator, a pressure obtained by adding the pushing pressure of the cooling water pump 20 to the water pressure based on the head difference in the water chamber 15 is used, and the cooling water pump 20 is activated while the refrigerator is stopped. Only the water pressure based on the head difference is used.
While cooling water is being blown, clean water is supplied from the cooling water supply pipe 21. This may be achieved by detecting the water level of the cooling water in the cooling tower 16 with a float and adjusting the replenishment amount of the clean water according to the water level. Further, a chemical solution is introduced from the chemical solution injection tube 23 as appropriate.
However, when a plurality of turbo chillers 1 are connected to the same cooling water supply pipe 21, the number of turbo chillers 1 exceeding the maximum supply water quantity qmax may be blown simultaneously. Can not. Here, n is determined as n satisfying n · q ≦ qmax.

As described above, according to the present embodiment, the following operational effects can be obtained.
The electrical conductivity sensor 24 is provided in the water chamber 15 of the condenser 5, and cooling water blow is performed based on the concentration of the cooling water in the water chamber 15. Thereby, it is possible to most accurately determine the possibility that the solid scale adheres to the heat transfer tube 14 provided in the condenser 5. Therefore, heat transfer inhibition in the condenser can be prevented and good heat transfer can be continued.
Further, the cooling water discharge port 27 for blowing is provided at the bottom of the water chamber 15 of the condenser 5. Thereby, the lower cooling water in which the solid scale generated by the concentration of calcium or the like is lowered and the degree of concentration is increased can be efficiently discharged to the outside.
Further, when the concentration detected by the chemical concentration sensor 25 is lowered, the chemical is supplied from the chemical injection pipe 23 via the system control unit 40. Thereby, the increase in contaminants, such as a slime in the condenser 5, can be suppressed.
Further, since the blow control is performed by the control unit 26 provided in each turbo refrigerator 1, the cooling water having an appropriate concentration for each refrigerator is used. Thereby, highly efficient driving | operation becomes possible for every refrigerator.

In this embodiment, the concentration of the cooling water is obtained by the electric conductivity sensor 24. However, the following changes may be made.
The integrated exchange heat quantity in the condenser 5 is calculated, and the cooling water quantity evaporated and reduced is calculated from the integrated exchange heat quantity. The degree of concentration is calculated from this reduced amount and the amount of cooling water retained. Since the exchange heat quantity in the condenser can be accurately obtained from the measurement data (temperature and pressure) during operation, the enrichment can be obtained accurately. Alternatively, the electrical conductivity sensor 24 may be selectively used. In this way, the blow timing can be determined even when the electrical conductivity sensor 24 fails.
Further, the cooling water blow may be performed not only while the refrigerator is operating but also when the refrigerator is stopped. If it is performed while the refrigerator is stopped, the cooling water can be discharged after the flow of the cooling water is stopped. If the flow of the cooling water is stopped, the foreign matter such as the solid scale falls due to its specific gravity, so that the foreign matter can be effectively removed.

It is the schematic block diagram which showed the turbo refrigerator and cooling tower concerning one Embodiment of this invention. It is sectional drawing which showed the cross section of the condenser of FIG.

Explanation of symbols

1 Turbo refrigerator (heat source machine)
3 Turbo Compressor 5 Condenser 7 Expansion Valve 9 Evaporator 14 Heat Transfer Tube 15 Water Chamber 16 Cooling Tower 24 Electrical Conductivity Sensor 26 Control Unit 28 Blow Piping (Blowing Means)
30 Servo valve (Blowing means)

Claims (11)

A heat source unit having a condenser that cools the refrigerant compressed by the compressor with cooling water to condense and liquefy, and
A cooling tower for sprinkling the cooling water in the outside air to evaporate a part thereof and cooling the cooling water by latent heat of evaporation;
Cooling water supply means for supplying cooling water to compensate for the reduced cooling water;
A cooling water circulation system for circulating the cooling water between the condenser and the cooling tower;
Blow means for discharging the cooling water to the outside at a predetermined interval;
In a heat source system comprising:
A heat source system comprising: a control unit that operates the blowing means based on the concentration of the cooling water in the condenser. Anti-corrosion, anti-corrosion, anti-bacterial for cooling water, equipped with a chemical solution injection means for adding a chemical solution having at least one function of suppressing the precipitation of solid components,
The heat source system according to claim 1, wherein the control unit operates the chemical solution injection unit based on a chemical concentration of the cooling water in the condenser.   The heat source system according to claim 1, wherein the control unit is provided in the heat source apparatus. The blowing means includes a cooling water discharge port,
The heat source system according to claim 1 or 2, wherein the cooling water discharge port is provided below the condenser.   4. The enrichment according to claim 1, wherein the enrichment is determined by an calculated integrated exchange heat quantity based on an electrical conductivity sensor provided in the condenser or an exchange heat quantity in the condenser. Heat source system as described in.   The heat source system according to any one of claims 1 to 4, wherein the blow by the blow means is performed when the heat source system is stopped. A plurality of the heat source machines are provided,
Even if the heat source system is in operation, if any of the heat source units is stopped, the blowing by the blowing unit is performed with priority given to the stopped heat source unit. Item 7. The heat source system according to any one of Items 1 to 6.   One blow by the blow means is a blow valve corresponding to the amount of water held in the condenser based on the flow coefficient (CV value) of the blow valve provided in the blow means and the internal pressure of the cooling water in the condenser. The heat source system according to any one of claims 1 to 7, wherein the heat source system is determined by determining an opening time and repeating the blow valve opening time once or a plurality of times. A plurality of the heat source devices including the blow means are provided in the same cooling water circulation system,
In order to prevent the amount of blown water to be discharged from exceeding the amount of supply of replenishing water that is the amount of cooling water to be replenished, a restriction is placed on simultaneous blowing that simultaneously blows the plurality of heat source units, and
The heat source system according to any one of claims 1 to 8, wherein blow stop control for temporarily stopping blow is performed when the lower limit liquid level of the makeup water tank is below.   10. A forced blow control instruction for forcibly performing blow from the system control panel of the heat source system is instructed to the control unit of the heat source unit, and the blow unit is controlled. The described heat source system. A heat source unit having a condenser that cools the refrigerant compressed by the compressor with cooling water to condense and liquefy, and
A cooling tower for sprinkling the cooling water in the outside air to evaporate a part thereof and cooling the cooling water by latent heat of evaporation;
Cooling water supply means for supplying cooling water to compensate for the reduced cooling water;
A cooling water circulation system for circulating the cooling water between the condenser and the cooling tower;
Blow means for discharging the cooling water to the outside at a predetermined interval;
In a method for controlling a heat source system comprising:
A control method for a heat source system, wherein the blow means is operated based on the concentration of the cooling water in the condenser.

Images