JPH11118281A - Method and system for controlling operation of a plurality of absorption chilled/hot water unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exhibit 100% capacity at the time of rated operation by providing a plurality of absorption chilled/hot water units and exchanging an absorption chilled/hot water unit sustaining rated operation for a specified time and an absorption chilled/hot water unit stopping operation or operating with low heating quantity. SOLUTION: In a system where a plurality of absorption chilled/hot water units are disposed in parallel and cooling water from each absorption chilled/hot water unit is cooled through a cooling tower and returned back to each absorption chilled/hot water unit, condensed water is supplied from a condenser 19 to an absorber 14 where an absorbent cooled by the cooling water absorbs the evaporated water in each absorption chilled/hot water unit. A bleeding tube 14a for discharging uncondensed gas is disposed at a specified position of the absorber 14 in order to discharge uncondensed gas. When some chilled/hot water unit is stopping or operating with low heating quantity, a chilled/hot water unit sustaining rated operation for a specified time and a chilled/hot water unit stopping operation or operating with low heating quantity are exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling the operation of a plurality of absorption chillers and hot water heaters. More specifically, the second refrigerant is cooled by the latent heat of vaporization of the first refrigerant. The first refrigerant evaporated by absorbing heat is absorbed by the absorbent, the absorbent is heated by a heating source to separate and condense the first refrigerant from the absorbent, and again the second refrigerant is heated by the latent heat of vaporization of the first refrigerant. Controlling the operation of each absorption chiller / heater in a system having a plurality of absorption chiller / heaters for cooling the refrigerant and configured to circulate the second refrigerant of each absorption chiller / heater through a cooling tower And a device therefor.

[0002]

2. Description of the Related Art Hitherto, there has been provided a system having a plurality of absorption chillers / heaters. Here, as an absorption type chiller / heater, for example, as shown in FIG. 8, a part of a chilled water pipe 51 through which chilled / hot water passes is surrounded, and water is evaporated in a state where the inside is set to a high vacuum. Cold water pipe 5 by latent heat of evaporation
1 and an aqueous solution of lithium bromide cooled by cooling water flowing through an evaporator heat exchanger 52 'through a cooling pipe 53 and cooling water flowing through an absorber heat exchanger 54' through a cooling pipe 53. And an aqueous solution of lithium bromide that has absorbed water vapor is sent by a pump 55,
A regenerator 57 that separates water vapor from the aqueous lithium bromide solution by being heated by the burner 56 and supplies the aqueous lithium bromide solution from which the water vapor has been separated to the absorber 54
And the steam separated in the regenerator 57 is supplied,
A condenser 59 that condenses water vapor by cooling with cooling water passing through a cooling water pipe 53 and supplies the condensed water to the evaporator 52, and a water vapor-absorbed lithium bromide aqueous solution supplied to the regenerator 57 by the pump 55 and regenerated at a high temperature Vessel 57 to absorber 54
A heat exchanger 61 for exchanging heat with an aqueous solution of lithium bromide supplied to the chiller, a temperature sensor 62 for detecting the temperature of cold / hot water passing through a heat transfer tube (cold water tube) 51, and a heating amount by a burner 56 A multi-position control valve 63 for controlling the temperature sensor 6
Multi-position control valve 63 with the temperature detected by
And a controller 64 that outputs a control signal for controlling the multi-position control valve 63 via a driver 65. Reference numeral 66 denotes a pump for circulating water accumulated at the bottom of the evaporator 52 and dispersing the water on the heat transfer tube 51 again.

A bleed pipe 59 for discharging non-condensable gas
a and 54 a are provided in the condenser 59 and the absorber 54. Further, the temperature of the regenerator 57 is set to 150 ° C. during the rated operation.
The settings are as follows. If the system having this configuration is employed, the temperature of the aqueous solution of lithium bromide is set at 150 ° C. or lower, so that a rapid increase in the corrosion rate due to the aqueous solution of lithium bromide can be prevented. In addition, since the non-condensable gas is discharged through the bleed pipe, the accumulation of the non-condensable gas is prevented, and the pressure / temperature of the regenerator rises, causing a high-pressure abnormal stop and a high-temperature abnormal stop. , The controllability of the cold / hot water outlet temperature is deteriorated, the fuel consumption is deteriorated, and the corrosion is further promoted.

[0004]

When the system having the above configuration is employed, the bleed tube is connected to the condenser 59 and the absorber 54.
Therefore, the configuration of each absorption chiller / heater becomes complicated, resulting in an increase in cost. In addition, the temperature of the aqueous lithium bromide solution was set to 150 ° C.
Since each absorption chiller / heater is operated at a temperature set below (a temperature at which non-condensable gas is not generated), there is also an inconvenience that 100% performance cannot be exhibited.

In connection with the former disadvantage, the condenser 5
In consideration of the fact that the absorber 9 and the absorber 54 are connected by piping, it is conceivable to provide a bleed tube only in the absorber 54. However, in the case where this configuration is adopted, since the liquid exists in this pipe during the continuous operation, it is impossible to guide the non-condensable gas in the condenser 59 to the absorber 54. As a result, when the rated operation is continued, the condenser 59
Non-condensable gas accumulates inside, and as a result, the pressure and temperature of the generator rise, causing the abnormal stop of high pressure and abnormal stop of high temperature, the refrigerating capacity decreases, and the controllability of the cold / hot water outlet temperature deteriorates. However, there is a disadvantage that the fuel consumption is deteriorated, and a problem that the corrosion is further advanced occurs.

Therefore, as shown in FIG.
The bleeding pipes 59a and 54a must be provided in the pump 9 and the absorber 54, respectively, which complicates the configuration as a whole and increases the cost.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is intended to prevent the construction and cost of each absorption-type chiller / heater from being complicated, and to achieve a 100% performance. It is an object of the present invention to provide a method of controlling the operation of a plurality of absorption chiller / hot water heaters capable of operating each absorption chiller / heater, and an apparatus therefor.

[0008]

According to the first aspect of the present invention, the method of controlling the operation of a plurality of absorption chiller / heater units cools the second refrigerant by the latent heat of vaporization of the first refrigerant and removes heat from the second refrigerant to evaporate. The first refrigerant is absorbed by the absorbent, and the absorbent is heated by a heating source to separate and condense the first refrigerant from the absorbent,
In a system configured to have a plurality of absorption chiller / heaters to cool the second refrigerant again by the latent heat of vaporization of the first refrigerant, and to operate the number of absorption chiller / heaters corresponding to the load by the operation control unit. A bleed pipe for discharging non-condensable gas is provided in a portion where the first refrigerant evaporated by removing heat from the second refrigerant is absorbed by the absorbent, and furthermore, the absorption type chiller / heater during operation stop or a low heating amount. In response to the presence of an absorption chiller / heater whose operation is being performed, the absorption chiller / heater whose rated operation has been continued for a predetermined period of time in response to the presence of the absorption chiller / heater or a low heating amount that has been shut down. It is a method of replacing the absorption type water heater / heater which is operated in the above.

According to a second aspect of the present invention, there is provided a method for controlling the operation of a plurality of absorption chillers and hot water heaters, wherein there are an absorption chiller and hot water heater whose operation is stopped and an absorption chiller and hot water heater which is operated at a low heating amount. In this method, the absorption chiller / heater that has been in rated operation for a predetermined period of time is replaced with the absorption chiller / heater that has stopped operating. The method for controlling the operation of a plurality of absorption chiller / hot water heaters according to claim 3 is characterized in that the rated operation is continued for a predetermined time in response to the presence of a plurality of absorption chiller / hot water heaters whose operation is stopped. This is a method for replacing the absorption chiller / heater with the longest elapsed time from the previous rated operation among the plurality of absorption chiller / heaters whose operation is stopped.

According to a fourth aspect of the present invention, there is provided a method for controlling the operation of a plurality of absorption chiller / heaters, wherein a plurality of absorption chiller / heaters operating at a low heating amount are present and rated operation is performed. In response to the presence of the absorption chiller / heater, the absorption chiller / heater that has continued rated operation for a predetermined period of time and a plurality of absorption chiller / heater that are operated at a low heating rate This method is to replace the absorption chiller / heater with the longest elapsed time since the last rated operation.

In a fifth aspect of the present invention, the operation control device for a plurality of absorption chiller-heaters cools the second refrigerant by the latent heat of vaporization of the first refrigerant, and removes the heat from the second refrigerant to evaporate the first refrigerant. And a plurality of absorption chiller / heaters for separating the first refrigerant from the absorbent by condensing the absorbent by heating the absorbent with a heating source and again cooling the second refrigerant by the latent heat of vaporization of the first refrigerant. In the system configured to operate the number of absorption chillers / heaters corresponding to the load by the operation control unit, the extraction pipe that discharges the non-condensable gas is deprived of heat from the second refrigerant by evaporation. (1) In response to the presence of an absorption type chiller / heater which is provided at a portion where the refrigerant is absorbed by the absorbent and which is operated at a low heating rate or an absorption type chiller / heater whose operation is stopped. , Absorption type chiller / heater with rated operation for a predetermined time It is intended to include operation control means for switching the absorption chiller is operated at the absorption chiller-heater or low amount of heat during shutdown is performed.

According to a sixth aspect of the present invention, the operation control device for a plurality of absorption chiller / hot water heaters includes, as operation control means, an absorption chiller / hot water heater whose operation is stopped and an absorption chiller / hot water whose operation is performed at a low heating amount. In this case, an absorption chiller / heater that has continued rated operation for a predetermined time in response to the presence of the chiller is replaced with an absorption chiller / heater whose operation is stopped. The operation control device for a plurality of absorption chiller / hot water heaters according to claim 7 continues the rated operation for a predetermined time in response to the plurality of absorption chiller / water heaters being stopped operating as operation control means. The above-mentioned absorption chiller / heater is replaced with an absorption chiller / heater whose operation time is the longest since the last rated operation among a plurality of suspended absorption chiller / heaters.

According to an eighth aspect of the present invention, in the operation control device for a plurality of absorption chiller / heater units, there are a plurality of absorption chiller / heater units operating at a low heating amount as operation control means. In response to the presence of an absorption chiller / heater whose rated operation is being performed, an absorption chiller / heater whose rated operation has been continued for a predetermined time and a plurality of units operating at a low heating rate Of the absorption type chiller / heater of which the time elapsed since the last rated operation is the longest.

[0014]

According to the method for controlling the operation of a plurality of absorption chillers / heaters, the second refrigerant is cooled by the latent heat of evaporation of the first refrigerant, and the first refrigerant evaporated by removing heat from the second refrigerant. An absorption chiller / heater that absorbs with an absorbent, heats the absorbent with a heating source, separates and condenses the first refrigerant from the absorbent, and cools the second refrigerant again by the latent heat of vaporization of the first refrigerant. In a system having a plurality of units and configured to operate the number of absorption type chillers / heaters corresponding to the load by the operation control unit, the bleed pipe for discharging the non-condensable gas is evaporated by removing heat from the second refrigerant. In response to the presence of an absorption chiller / heater that is provided in a portion where the first refrigerant is absorbed by the absorbent, and that is operating at a low heating rate, or an absorption chiller / heater that is operating at a low heating rate. And the absorption type cold and hot water for which the rated operation was continued for a predetermined time And the absorption chiller / heater that is stopped or the absorption chiller / heater that is operated at a low heating rate is replaced. The agent is heated by a heating source to separate the first refrigerant from the absorbent to prevent accumulation of non-condensable gas in the condensed portion, and to prevent various inconveniences caused by accumulation of non-condensable gas. it can. In addition, the structure of each absorption chiller / heater can be simplified, the cost can be prevented from increasing, and 100% performance can be exhibited during rated operation. Of course, the capacity of the system as a whole does not change.

According to the method for controlling the operation of a plurality of absorption chillers / heaters, there are an absorption chiller / heater whose operation is stopped and an absorption chiller / heater which is operated at a low heating amount. In response to this, the absorption chiller / heater whose rated operation has been continued for a predetermined time is replaced with the absorption chiller / heater whose operation has been stopped. The non-condensable gas can be discharged through the bleed pipe by shutting down the apparatus, so that the absorption chiller / heater from which the non-condensable gas has been discharged can be more reliably rated and operated. The same operation as described above can be achieved.

According to the third aspect of the present invention, in the method of controlling the operation of a plurality of absorption chillers, the rated operation is continued for a predetermined time in response to the presence of a plurality of suspended absorption chillers. Of the absorption chiller / heater that has been operating and the absorption chiller / heater that has been operating for the longest time since the last rated operation out of a plurality of absorption chiller / heaters that have been shut down. Can perform rated operation of the absorption type chiller / heater in which the best operation is performed, and can prevent the occurrence of inconvenience caused by the non-condensable gas in the entire system as well as the best case. The same operation as described above can be achieved.

According to a fourth aspect of the present invention, there is provided a method for controlling the operation of a plurality of absorption chillers and hot water heaters. In response to the presence of an absorption chiller / heater that has been operated, the absorption chiller / heater that has continued rated operation for a predetermined time in response to the presence of the absorption chiller / heater that has been operated at a low heating rate Of the chilled water heaters, the absorption chilled water heater that has the longest elapsed time since the last rated operation is replaced, so the rated operation of the absorption chilled water heater that discharges noncondensable gas quite well is performed. Thus, the system as a whole can favorably prevent the occurrence of inconvenience caused by the non-condensable gas, and can achieve the same operation as the first or second aspect.

According to a fifth aspect of the present invention, in the operation control device for a plurality of absorption type water heaters, the second refrigerant is cooled by the latent heat of evaporation of the first refrigerant, and the first refrigerant evaporated by removing heat from the second refrigerant. An absorption chiller / heater that absorbs with an absorbent, heats the absorbent with a heating source, separates and condenses the first refrigerant from the absorbent, and cools the second refrigerant again by the latent heat of vaporization of the first refrigerant. In a system having a plurality of units and configured to operate the number of absorption type chillers / heaters corresponding to the load by the operation control unit, the bleed pipe for discharging the non-condensable gas is evaporated by removing heat from the second refrigerant. There is an absorption chiller / heater which is provided at a portion where the first refrigerant is absorbed by the absorbent, and which is operated by the operation control means while the operation is stopped or at a low heating amount. The rated operation in response to Interchanging and time continuous absorption chiller-heater, an absorption chiller is operated at the absorption chiller-heater or low amount of heat during shutdown is performed. Therefore, of the absorption chiller / heater performing the rated operation, the absorbent is heated by the heating source to separate the first refrigerant from the absorbent and prevent the non-condensable gas from accumulating in the condensed portion. Various inconveniences caused by accumulation of the condensed gas can be prevented. In addition, the structure of each absorption chiller / heater can be simplified, the cost can be prevented from increasing, and 100% performance can be exhibited during rated operation. Of course, the capacity of the system as a whole does not change.

According to a sixth aspect of the present invention, in the operation control device for a plurality of absorption chiller / heater units, as the operation control means, the absorption chiller / heater unit in a stopped operation and the absorption type chiller / heater operated with a low heating amount are used. In response to the presence of the chiller / heater, an absorption chiller / heater that has continued rated operation for a predetermined period of time is replaced with an absorption chiller / heater whose operation is stopped. The non-condensable gas can be discharged through the bleed pipe by shutting down the absorption chiller / heater that has been operating for a predetermined period of time. In addition to the above, the same operation as in claim 5 can be achieved.

According to a seventh aspect of the present invention, in the operation control device for a plurality of absorption chiller / hot water heaters, the operation control means responds to the presence of a plurality of suspended absorption chiller / hot water heaters in the operation mode. Adopt an absorption chiller / heater that has been in operation for a predetermined period of time, and replace the absorption chiller / heater with the longest elapsed time since the last rated operation among the plurality of absorption chiller / heaters whose operation has been stopped. Therefore, the absorption chiller / heater in which the discharge of the non-condensable gas is most preferably performed can be operated at the rated operation, and the occurrence of the inconvenience caused by the non-condensable gas as the whole system can be most effectively prevented. Claim 5
Alternatively, an effect similar to that of claim 6 can be achieved.

In the operation control device for a plurality of absorption chiller / hot water heaters of claim 8, there are a plurality of absorption chiller / hot water heaters operating at a low heating amount as operation control means. In addition, in response to the presence of the absorption chiller / heater that is performing the rated operation, the absorption chiller / heater that has continued the rated operation for a predetermined time and the operation with a low heating amount are being performed. Of the multiple absorption chiller / heaters, the one that replaces the absorption chiller / heater with the longest elapsed time since the last rated operation is adopted. In addition to being able to perform rated operation of the water-cooled water heater, it is possible to satisfactorily prevent the occurrence of inconvenience caused by non-condensable gas as a whole system, and to achieve the same effect as in claim 5 or claim 6. it can.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a method for controlling the operation of a plurality of absorption chillers and hot water heaters according to the present invention; FIG. 1 is a schematic diagram showing the configuration of a system having three absorption chillers / heaters. In this system, three absorption chiller / heaters 1 are provided in parallel between an inlet / outlet collector 31 and an outlet collector 32 of chilled / hot water. A cooling tower 33 for cooling three refrigerants (for example, cooling water) and supplying the cooling water to the three absorption-type hot / cold water heaters 1 again is provided. Further, a controller 4 for supplying an operation control signal (including a start instruction signal and the like) and the like to each of the three absorption chiller / heaters 1 is provided. Further, a temperature sensor (third refrigerant temperature sensor) 37 for detecting the temperature of the cooling water inlet is provided at the cooling water inlet of each absorption-type water heater / cooler 1 in advance. Furthermore, a temperature sensor (second refrigerant temperature sensor) 36 for detecting the temperature of the second refrigerant is provided in the outlet collecting part 32. However, instead of a system having three absorption chillers, a system having two absorption chillers and four or more absorption chillers can be employed.

The first pump 3 is located at a predetermined position of a pipe for supplying cold and hot water from the inlet collecting section 31 to each of the absorption-type hot and cold water heaters 1.
4, and a second pump 35 is provided at a predetermined position in a pipeline for supplying cold and hot water from the cooling tower 33 to each of the absorption-type cold and hot water machines 1. Further, the second refrigerant (for example, cold and hot water) sent out from the outlet collecting part 32 is guided to a use space such as a room through a pipe 38, and thereafter, the inlet collecting part 3
It is led to 1. Further, a flow control valve 38a is provided at a predetermined position of the pipe 38, and a flow control unit 38b is provided. In addition, 38c is a bypass pipe which communicates between the inlet collecting part 31 and the outlet collecting part 32,
It has a valve 38e controlled by a differential pressure switch 38d operated by a differential pressure between the inlet collecting part 31 and the outlet collecting part 32.

However, as shown in FIG. 2, it is a matter of course that a configuration in which the cooling tower 33 is provided for each absorption type chiller / heater 1 may be adopted. Further, in the system of FIG. 2, a pump control unit 38f is provided in each absorption-type chiller / heater 1, and the pump control unit 38f controls the corresponding first pump 34 and second pump 35 to control the first refrigerant. The flow rate and the flow rate of the second refrigerant are controlled.

FIG. 3 is a block diagram schematically showing the structure of the absorption type water heater / heater 1. As shown in FIG. The absorption chiller / heater 1 surrounds a part of a chilled water pipe 11 through which chilled and heated water passes, and evaporates water (first refrigerant) in a state where the inside is set to a high vacuum. The evaporator 12 cools the cold / hot water (second refrigerant) flowing through the evaporator heat exchanger 12 'through the first cooling water 13 and the cooling water (third refrigerant) flowing through the absorber heat exchanger 14' through the cooling pipe 13. Absorber 14 for absorbing water vapor (evaporated first refrigerant) with aqueous solution of lithium bromide (absorbent) cooled in step 1, and aqueous solution of lithium bromide having absorbed water vapor are pumped by pump 15 and heated by burner 16. Thus, a high-temperature regenerator 17 for separating water vapor from the aqueous solution of lithium bromide and an aqueous solution of lithium bromide from which the water vapor has been separated in the high-temperature regenerator 17 are supplied, and the water vapor separated in the high-temperature regenerator 17 is passed. Thus, a low-temperature regenerator 18 for further separating water vapor from the lithium bromide aqueous solution and supplying the lithium bromide aqueous solution from which the water vapor has been separated to the absorber 14, and a water vapor and low-temperature regenerator 18 separated in the high temperature regenerator 17 Is supplied to the evaporator 12 by condensing the steam by cooling with cooling water passing through the cooling water pipe 13, and the steam supplied to the high-temperature regenerator 17 by the pump 15. A low-temperature heat exchanger 20 for performing heat exchange between the aqueous solution of lithium bromide that has absorbed water and the aqueous solution of lithium bromide supplied to the absorber 14 from the low-temperature regenerator 18, The high-temperature heat exchanger 21 for exchanging heat with the aqueous solution of lithium bromide supplied from the regenerator 17 to the low-temperature regenerator 18 and the heat transfer tube (cold water tube) 11 Temperature sensor 22 for detecting the temperature of cold and hot water passing therethrough
And the multi-position control valve 2 for controlling the amount of heating by the burner 16
And a controller 24 that outputs a control signal for controlling the multi-position control valve 23 by using the temperature detected by the temperature sensor 22 as an input, and supplies the control signal to the multi-position control valve 23 via a driver 25. Reference numeral 26 denotes a pump for circulating water accumulated at the bottom of the evaporator 12 and spraying the water on the heat transfer tube 11 again.

FIG. 4 is a schematic diagram showing an example of the relationship between the condenser 19 and the absorber 14. The condensed water from the condenser 19 is passed through a condensed water pipe 19a and the evaporator 1 of the absorber 14 is removed.
2 above. And the absorber 1
Bleed pipe 1 for discharging non-condensable gas at a predetermined position
4a is provided to discharge the non-condensable gas only from the absorber 14. An orifice is provided at a predetermined position of the condensed water pipe 19a.

With such a configuration, the condensed water pipe 19a is filled with the condensed water during the rated operation, so that the non-condensable gas is not guided from the condenser 19 to the absorber 14. However, when the operation is stopped, the condensed water pipe 1
Since 9 a is not filled with condensed water, non-condensable gas is led from the condenser 19 to the absorber 14. When the load is low, the amount of the condensed water guided by the condensed water pipe 19a is reduced, so that the non-condensable gas is guided from the condenser 19 to the absorber 14. However, the amount of the non-condensable gas guided to the absorber 14 when the load is low is smaller than the amount of the non-condensable gas guided to the absorber 14 when the operation is stopped.

As the multi-position control valve 23, for example,
A three position control valve is employed. However, as the multi-position control valve 23, for example, a two-position control valve, a four-position control valve, or the like can be adopted. Instead of the burner 16, a heating source utilizing waste heat such as steam can be employed.

Furthermore, the low-temperature regenerator 18 can be omitted, and various types of absorption chiller / heater can be employed. The operation of the absorption chiller / heater having the above configuration is conventionally known, and the description of the operation will be omitted. FIG. 5 is a block diagram schematically showing a configuration of the controller 4.

The controller 4 calculates a load amount by using the cold / hot water temperature from the second refrigerant temperature sensor 36 as an input, and operates the absorption chiller / heater 1 using the calculated load as an input. Operating number setting part 4 for setting the number of units
2, a heating amount setting unit 43 for setting the heating amount of the absorption chiller / heater 1 to be operated with the calculated load amount as an input, and each absorption chiller / heater based on the set number of operation units and the heating amount. The operation instruction unit 44 that supplies an operation instruction signal to the first controller 24 and the operation continuation time of the absorption chiller / heater 1 that is operating with a high heating amount (rated operation) are measured. Is changed to an operation stop instruction signal for the absorption type chiller / heater 1 whose rated operation continuation time has reached the predetermined time, on condition that the operation time has reached the predetermined time. Instruction changing unit 45 that changes the operation stop instruction signal for the water heater / cooler 1 to an operation instruction signal instructing that rated operation should be performed.
And

The load amount calculating section 41 performs sampling at a cycle of low heating amount-high heating amount-low heating amount of each absorption type chiller / heater 1, for example, when the maximum output is given during the sampling period. A value based on an actual output during the sampling period, for example, a value, for example, an integral value, for example, a ratio of the integral value is obtained as a load factor (percentage of the maximum load amount).

The number-of-operations setting section 42 applies the load factor calculated by the load calculation section 41 to an operation state-load factor characteristic set in advance as shown in FIG. The number is set. The heating amount setting unit 43 applies, for example, the load factor calculated by the load calculation unit 41 to a proportional control characteristic set in advance as indicated by a broken line in FIG.
The heating amount of each absorption-type hot / cold water heater 1 is set. However, in this setting, one of the absorption-type water chillers / heaters 1 set by the number-of-operations setting unit 42 is set to switch between the high heating amount, the low heating amount, and the operation stop, and the remaining Is set to a high heating amount (rated operation).

FIG. 7 is a flow chart for explaining the processing of the operation instruction changing unit 45. In step SP1, it is determined whether or not the absorption chiller / heater 1 that has continued the rated operation for a predetermined time (for example, 4 to 7 hours) or more is present, and such an absorption chiller / heater 1 is present. If not, the determination in step SP1 is performed again. If it is determined in step SP1 that there is an absorption chiller / heater 1 that has been performing the rated operation for a predetermined time or longer, in step SP2, it is determined whether or not the absorption-type chiller / heater 1 in the stopped state exists. It is determined whether or not the absorption chiller / heater 1 in the operation stop state does not exist, in step SP4, there is the absorption chiller / heater 1 burning the burner 16 with a low heating amount. Is determined. Then, when it is determined in step SP2 that the absorption-type water heater / cooler 1 in the operation stop state exists, in step SP3, the absorption-type water heater / heater 1 in the operation stop state from the last rated operation The absorption chiller / heater 1 having the maximum elapsed time is operated at the rated value, and the absorption chiller / heater 1 that has been in the rated operation for a predetermined time or more is put into an operation stop state. If it is determined in step SP4 that there is an absorption chiller / heater 1 burning the burner 16 with a low heating amount, then in step SP5, the combustion of the burner 16 with a low heating amount is determined. Of the absorption type water chiller / heater 1 performing the rated operation, the absorption chiller / heater 1 having the maximum elapsed time from the previous rated operation is rated and the rated operation is continued for a predetermined time or more. Is set to a state in which the burner 16 is burned with a low heating amount.

When the processing in step SP3 is performed, when it is determined in step SP4 that there is no absorption chiller / heater 1 burning the burner 16 with a low heating amount, or in step SP5. If the processing has been performed, the determination in step SP1 is performed again. However, if it is determined in step SP4 that there is no absorption chiller / heater 1 burning the burner 16 with a low heating amount, the operation of at least one absorption chiller / heater 1 is stopped. Burner 1 with or without heating
6 is preferably performed.

Here, the duration of the rated operation is 4 to 7 hours.
Is set for the following reason. High temperature regeneration
The relationship between the amount of iron corrosion and the amount of non-condensable gas generated in the heater 17
Between the corrosive iron and the non-condensable gas (hydrogen gas)
The molar ratio is Fe: H_Two= 1: 1 to 3: 4. Soshi
1 mole of Fe is 55.8 g, and 1 mole of H_TwoBut
Because it is 2 g (= 22.4 l), it is generated from 1 g of iron
The non-condensable gas is 0.54 l / g (1 atm) at maximum.
In addition, iron corrosion weight loss (thickness) is the
Is it a characteristic indicating the relationship between the amount of corrosion of steel and the alkali temperature of the solution?
0.071 (mm / year) = 8.1 × 10^-6(Mm /
hr), and the internal area of the high-temperature regenerator 17 is 13.0 (m
^Two), The internal volume of the high-temperature regenerator 17 is 0.132 (m^Three)
, The allowable time is estimated as follows:
Is done.

When the pressure of the high-temperature generator 17 equivalent to the atmospheric pressure rises by 0.05 (kg / cm ² ), the amount of non-condensable gas generated at that time is 0.132 × 0.05 / 1.03 =
0.0064 (m ³ ) = 6.4 (l), which is 6.4 / 0.54 = 11.9 (g) in terms of the amount of iron corrosion. Since the specific gravity of iron is 7.86 (g / cm ³ ), the rated operation allowable time is 11.9 (g) / $ 8.
1 × 10 ⁻⁶ (mm / hr) × 13.0 (m ² ) × 7.8
6 (g / cm ³ )｝ = 14.4 (hr). Therefore, assuming that the safety factor is 2-3 times, the rated operation allowable time is 4.8 to 7.2 hours.

If the system having the above configuration is adopted, the number of operating absorption-type chiller / heater 1 is set based on the load factor, and the amount of heating of each absorption-type chiller / heater 1 is set so that the cooling / heating water is set. It can continue to supply indoors. When the absorption chiller / heater 1 performing the rated operation and the absorption chiller / heater 1 performing the rated operation are present, the high-temperature regeneration of the absorption chiller / heater 1 performing the rated operation is performed. The amount of non-condensable gas generated in the device 17 increases, and the non-condensable gas is not guided to the absorber 14. Therefore, the non-condensable gas cannot be discharged through the bleed pipe 14a.

However, the absorption chiller / heater 1 in which the rated operation has been continued for a predetermined time is put into the operation stop state, and the absorption chiller / heater 1 in the operation stop state is put into the rated operation state. The generated non-condensable gas is led to the absorber 14 after the operation is stopped, and the bleeding pipe 14a
Is discharged through. In addition, the absorption chiller / heater 1 from which the non-condensable gas has been discharged through the bleed pipe 14a is operated at a rated speed. Therefore, the non-condensable gas can be reliably discharged only by providing the bleed pipe 14a in the absorber 14, and the accumulation of the non-condensable gas can be prevented.

When the absorption chiller / heater 1 burning the burner 16 with a low heating amount and the absorption chiller / heater 1 performing the rated operation exist, the rated operation is not performed. The amount of non-condensable gas generated in the high-temperature regenerator 17 of the absorption chiller / heater 1 is increased, and the non-condensable gas is not guided to the absorber 14. Therefore,
This non-condensable gas cannot be discharged through the bleed pipe 14a.

However, the absorption chiller / heater 1 whose rated operation has been continued for a predetermined time is brought into a state in which the burner 16 is burned with a low heating amount, and the absorption humidifier burning the burner 16 with a low heating amount is used. The non-condensable gas generated at the time of the rated operation is because
After the burner 16 burns with a low heating amount, the burner 16 is guided to the absorber 14 and discharged through the bleed pipe 14a. In addition, the absorption chiller / heater 1 from which the non-condensable gas has been discharged through the bleed pipe 14a is operated at a rated speed. Therefore, the non-condensable gas can be reliably discharged only by providing the bleed pipe 14a in the absorber 14, and the accumulation of the non-condensable gas can be prevented. However, in the absorption type chiller / heater 1 in which the burner 16 is burning with a low heating amount, the condenser 1
Although the amount of the non-condensable gas transferred to the condenser 4 is smaller than the amount of the non-condensable gas transferred from the condenser 19 to the absorber 14 in the absorption type chiller / heater 1 in the stopped state, the accumulation of the non-condensable gas is reduced. Since it can be stored, there is no particular inconvenience.

[0041]

According to the first aspect of the present invention, in the absorption type chiller / heater performing rated operation, the absorbent is heated by the heating source to separate the first refrigerant from the absorbent and to be non-condensed in the condensed portion. Gas accumulation can be prevented, various inconveniences caused by accumulation of non-condensable gas can be prevented, and the structure of each absorption chiller / heater can be simplified and cost can be prevented. In addition, there is a unique effect that 100% performance can be exhibited during rated operation.

According to the second aspect of the present invention, the absorption type chiller / heater from which the non-condensable gas has been discharged can be more reliably operated at the rated operation, and the same effects as those of the first aspect can be obtained. According to the third aspect of the present invention, the absorption chiller / heater that discharges the non-condensable gas most efficiently can be operated at rated operation, and the occurrence of inconvenience caused by the non-condensable gas as a whole system can be most effectively prevented. In addition to the above, the same effects as those of claim 1 or claim 2 can be obtained.

According to the fourth aspect of the present invention, it is possible to perform rated operation of the absorption type chiller / heater in which the discharge of the non-condensable gas has been performed fairly well, and to satisfactorily prevent the occurrence of inconvenience caused by the non-condensable gas as a whole system. In addition to the above effects, the same effects as those of claim 1 or claim 2 are obtained. The invention according to claim 5 is that, in the absorption chiller / heater performing the rated operation, the absorbent is heated by the heating source to separate the first refrigerant from the absorbent, and the non-condensable gas is accumulated in the condensed portion. And prevent the occurrence of various inconveniences caused by accumulation of non-condensable gas.Also, the structure of each absorption chiller / heater can be simplified, and the cost can be prevented. A unique effect that 100% performance can be exhibited.

According to the sixth aspect of the present invention, the absorption type chiller / heater from which the non-condensable gas has been discharged can be more reliably operated at rated operation, and the same effect as that of the fifth aspect can be obtained. According to the seventh aspect of the present invention, the absorption type chiller / heater in which the non-condensable gas is discharged most preferably can be operated at rated operation, and the occurrence of inconvenience caused by the non-condensable gas as the whole system can be prevented most preferably. In addition to the above, the same effects as those of claim 5 or claim 6 can be obtained.

According to the eighth aspect of the present invention, the absorption type chiller / heater in which the discharge of the non-condensable gas has been performed fairly well can be operated at the rated operation, and the occurrence of inconvenience caused by the non-condensable gas can be satisfactorily performed as a whole system. In addition to the above advantages, the same effects as those of the fifth or sixth aspect are obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of the configuration of a system having three absorption chillers / heaters.

FIG. 2 is a schematic diagram showing another example of the configuration of a system having three absorption chillers / heaters.

FIG. 3 is a block diagram schematically showing a configuration of an absorption type water cooling / heating machine.

FIG. 4 is a schematic diagram showing an example of a relationship between a condenser and an absorber.

FIG. 5 is a block diagram schematically showing a configuration of a controller 4.

FIG. 6 is a diagram showing operating state-load factor characteristics.

FIG. 7 is a flowchart illustrating a process of a driving instruction change unit.

FIG. 8 is a block diagram schematically showing a configuration of a conventional absorption chiller / heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorption chiller / heater 14 Absorber 14a Bleed tube 45 Operation instruction change part

Claims (8)

[Claims] The second refrigerant is cooled by the latent heat of vaporization of the first refrigerant, heat is taken from the second refrigerant, the evaporated first refrigerant is absorbed by an absorbent, and the absorbent is heated by a heating source and absorbed. A plurality of absorption chiller / heaters (1) for separating and condensing the first refrigerant from the agent and cooling the second refrigerant again by the latent heat of vaporization of the first refrigerant, and the operation control unit responds to the load. In a system configured to operate a number of absorption chillers / heaters (1), a bleed pipe (14a) for discharging non-condensable gas is provided with an absorbent so that the first refrigerant evaporated by absorbing heat from the second refrigerant is absorbed. The absorption chiller / heater (1) which is provided in the absorbing portion (14) and which is operated at a low heating rate while the operation is stopped or the absorption chiller / heater (1) is operated. In response, absorption type chiller / heater (1) whose rated operation has been continued for a predetermined time And a plurality of absorption chiller / hot water heaters, wherein the absorption chiller / heater (1) in operation is stopped or the absorption chiller / heater (1) operated at a low heating amount is replaced. Operation control method. 2. The rated operation in response to the presence of the absorption chiller / heater (1) that is shut down and the absorption chiller / heater (1) that operates at a low heating rate. 2. The method of controlling the operation of a plurality of absorption chiller / heater units according to claim 1, wherein the absorption chiller / heater unit (1) in which the operation is continued for a predetermined time is replaced with the absorption chiller / heater unit (1) whose operation is stopped. 3. 3. An absorption chiller / heater (1) that has continued rated operation for a predetermined time in response to the presence of a plurality of absorption chiller / heater (1) that has been shut down. The absorption chilled / hot water according to claim 1 or 2, wherein the absorption chilled / hot water heater (1) is replaced with the absorption chilled / hot water heater (1) having the longest elapsed time since the last rated operation. Operation control method for multiple machines. 4. A plurality of absorption chiller / heater (1) operating at a low heating amount and an absorption chiller / heater (1) operating at rated operation exist. In response to the operation, the absorption chiller / heater (1) in which the rated operation is continued for a predetermined time and the absorption chiller / heater (1) in which a plurality of absorption chiller / heaters (1) are operated at a low heating amount. The method for controlling the operation of a plurality of absorption chiller / heater units according to claim 1 or 2, wherein the absorption chiller / heater unit (1) having the longest elapsed time since the last rated operation is replaced. 5. The second refrigerant is cooled by the latent heat of vaporization of the first refrigerant, heat is taken from the second refrigerant, the evaporated first refrigerant is absorbed by an absorbent, and the absorbent is heated and absorbed by a heating source. A plurality of absorption chiller / heaters (1) for separating and condensing the first refrigerant from the agent and cooling the second refrigerant again by the latent heat of vaporization of the first refrigerant, and the operation control unit responds to the load. In a system configured to operate a number of absorption chillers / heaters (1), a bleed pipe (14a) for discharging non-condensable gas is provided with an absorbent so that the first refrigerant evaporated by absorbing heat from the second refrigerant is absorbed. The absorption chiller / heater (1) which is provided in the absorbing portion (14) and which is operated at a low heating rate while the operation is stopped or the absorption chiller / heater (1) is operated. In response, absorption type chiller / heater (1) whose rated operation has been continued for a predetermined time And an operation control means (45) for exchanging the absorption chiller / heater (1) with the operation stopped or the absorption chiller / heater (1) operated with a low heating amount. Operation control device for multiple absorption chiller / heater units. 6. The operation control means (45) includes an absorption type chiller / heater (1) whose operation is stopped and an absorption type chiller / heater (1) whose operation is performed with a low heating amount. The absorption chiller / heater according to claim 5, wherein the absorption chiller / heater (1) in which the rated operation is continued for a predetermined time is replaced with the absorption chiller / heater (1) in a stopped state. Operation control device for multiple water machines. 7. The operation control means (45) responds to the presence of a plurality of absorption type chiller / heater units (1) whose operation is stopped, and continues the rated operation for a predetermined period of time. (1) and a plurality of absorption-type hot / cold water heaters (1) while the operation is stopped
7. The operation control device for a plurality of absorption chiller / heater units according to claim 5, wherein the absorption chiller / heater unit having the longest elapsed time since the last rated operation is replaced. 8. The operation control means (45) includes a plurality of absorption chiller / heater (1) operating at a low heating amount, and an absorption chiller / heater (1) operating at a rated operation. In response to the presence of the chiller / heater (1), an absorption chiller / heater (1) in which rated operation is continued for a predetermined time and a plurality of absorption chiller / heaters operating at a low heating amount The plurality of absorption chiller / heaters according to claim 5 or 6, wherein the chiller / heater (1) replaces the absorption chiller / heater (1) having the longest elapsed time since the last rated operation. Stand operation control device.