KR101927496B1 - an adsorption chiller system extended by modules and a method using the same - Google Patents

Abstract

According to the present invention, a module expandable adsorption type refrigerator comprises: n adsorption type refrigeration modules; a main control unit controlling operation of a plurality of the adsorption type refrigeration modules; a cooling water supply unit; and a cold water collecting unit. Each of the n adsorption type refrigeration modules comprises: an evaporator including a cold water inflow hole and a cold water outflow hole; an evaporation side adjusting unit adjusting the cold water inflow hole and the cold water outflow hole; at least two adsorption tops including an adsorbent; a condenser including a cooling water inflow hole and a cooling water outflow hole; and a condensation side adjusting unit adjusting the cooling water inflow hole and the cooling water outflow hole.

Description

The present invention relates to an adsorption chiller system and a method for driving the same,

The present invention relates to a module expansion type absorption refrigerator system and a driving method thereof, and more particularly, to a module expansion type absorption refrigerator system capable of implementing an improved absorption type refrigerator system by combining an absorption type refrigeration module and a driving method thereof.

In the adsorption refrigerator system, an adsorption tower for adsorbing vaporized refrigerant is used. The adsorption tower generally has a large size of adsorption tower because of its feature of using a solid adsorbent. In order to increase the capacity, such larger-sized adsorption columns must be made larger. In this case, it has been pointed out that the installation area of the machine room, especially the floor height, is a problem, and there are limitations in application for the small and medium sized central air conditioning system.

As such, the size of the refrigerator has been a constant problem for conventional adsorption refrigerator systems. In order to use a large-sized adsorption refrigerator system for small- to medium-sized central air conditioning, it is difficult to install a refrigerator having a size capable of accommodating the facility at least in a general machine room or a floor space. We have tried various ways to solve this problem, but we have not been able to develop a suitable method that can be effectively implemented in small to medium scale.

Patent No. 10-0057862

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an adsorption type refrigerator system in which a plurality of adsorption type freezing modules are combined to realize a great amount of freezing amount.

Another object of the present invention is to provide a driving method capable of achieving efficient use of hot water and uniform cooling ability by controlling a driving interval driven for each module in driving an adsorption type refrigerator system in which a plurality of adsorption type freezing modules are combined .

In order to achieve the above object, a module expanding type refrigerating machine according to an embodiment of the present invention includes n adsorption type refrigeration modules, a main controller for controlling driving of the plurality of adsorption type refrigeration modules, a cooling water supply part, and a cold water recovery part . Each of the n adsorption type freezing modules includes an evaporator including a cold water inlet and a cold water outlet, at least two or more adsorption towers including an adsorbent, a cooling water inlet and a cooling water outlet for controlling the cold water inlet and the cold water outlet And a condensing side regulating part for regulating the cooling water inlet and the cooling water outlet. The cooling water supply unit includes a cooling water supply pump, a cooling water supply inlet pipe for supplying cooling water to the cooling water inlet of each adsorption refrigeration module in the order of the first direction, and a cooling water supply inlet pipe for collecting cooling water from the cooling water outlet of each absorption refrigeration module And a cooling water outlet leading pipe. The cold water recovery unit includes a cold water supply inlet pipe for supplying cold water to the cold water inlet for supplying cold water to the cold water inlet of each adsorption refrigeration module in the order of the first direction, And a cold water outflow pipe for recovering cold water from a cold water outflow port of the cold water outflow pipe. Wherein the main controller controls the plurality of evaporation-side regulators and the condensation-side regulators individually, drives the plurality of adsorption-type refrigeration modules in the order of the first direction, drives the adsorption-type refrigeration modules in the first direction, And the interval to be driven is (t1 + t2 + m) / n. t1 is the adsorption cycle time, t2 is the desorption cycle time, and m is the stabilization time.

In one embodiment, t1 = t2 and t1 = 7M.

In one embodiment, t1 = t2 is 420s and m1 = 60s.

In one embodiment, the cooling water supply pump is constituted by one or more pumps and supplies a predetermined amount of cooling water to the cooling water pipe, and the predetermined amount of the cooling water corresponds to the number of the absorption refrigeration modules moving in the order of the first direction And the like.

According to another aspect of the present invention, there is provided a method of driving a module expansion type adsorption refrigerator according to another embodiment of the present invention, in which a main control unit drives each of the adsorption type refrigeration modules in the order of a first direction, And an interval for driving the freezing module is (t1 + t2 + m) / n. T1 is the adsorption cycle time, t2 is the desorption cycle time, and m is the stabilization time. The module expansion type adsorption refrigerator includes n adsorption refrigeration modules, a main control unit for controlling the driving of the plurality of adsorption type refrigeration modules, a cooling water supply unit, and a cold water recovery unit.

each of the n adsorption type freezing modules includes an evaporator including a cold water inlet and a cold water outlet, at least two or more adsorption towers including an adsorbent, a cooling water inlet and a cooling water outlet for controlling the cold water inlet and the cold water outlet, A condenser, and a condensation side regulator for regulating the cooling water inlet and the cooling water outlet.

According to the present invention having the above-described configuration, the following effects can be achieved.

First, by combining a plurality of adsorption type freezing modules, it is possible to realize a large capacity adsorption type freezer system that can be applied even at a limited facility scale. Therefore, despite the limitation of the installation area and bed height of the machine room, the possibility of applying the absorption refrigerator system in general buildings has been opened.

In addition, when providing a partial load, since the logic that can partially drive the adsorption refrigerator system composed of the module is provided, the efficiency can be improved and the control of the cold water and the cooling water can be easily performed.

Further, by driving the individual modules by using the calculated intervals, it is possible to prevent the unevenness of the cooling capacity as a whole and effectively use the supplied external hot water.

FIGS. 1A through 1C are schematic diagrams illustrating a module expandable adsorber refrigerator system in accordance with an embodiment of the present invention.
FIG. 2 is a flowchart illustrating the driving of the module expanding type absorption refrigerator system according to the embodiment of FIG.
3 is a flowchart illustrating an algorithm for driving a cold water and cooling water pump of a module expansion type absorption refrigerator system according to another embodiment of the present invention.
FIG. 4 is a graph illustrating driving of a module expansion type absorption refrigerator system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other constituents and actions .

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Composition of refrigerator system

FIGS. 1A through 1C are schematic diagrams illustrating a module expandable adsorber refrigerator system in accordance with an embodiment of the present invention.

1A to 1C, a module expansion type adsorption refrigerator system 1000 according to the present embodiment includes n adsorption type refrigeration modules C1, C2, C3, and C4, a main control unit for controlling driving of a plurality of adsorption type refrigeration modules, (100), a cooling water supply unit (200), and a cold water recovery unit (300). In this embodiment, the refrigerator system composed of four adsorption refrigeration modules is used as a reference.

 The adsorption refrigeration modules C1, C2, C3 and C4 include an evaporator 10, adsorption towers 21 and 22 and a condenser 30 as well as an evaporation side regulator 18, 38). The evaporation side regulating portion 18 and the condensing side regulating portion 38 are necessary components for the absorption refrigerator to constitute the system.

 The evaporator includes a cold water inlet 11 and a cold water outlet 12. The cold water flows in through the cold water inlet 11 provided from the outside and the cold water is discharged through the cold water outlet 12. The evaporator is connected to the first and second adsorption towers (21, 22), and the evaporated refrigerant is adsorbed by the adsorbent contained in the first and second adsorption towers (21, 22). In this case, of course, the evaporated refrigerant is adsorbed alternately in accordance with the driving sequence of the adsorption type refrigerator in which adsorption and desorption proceed alternately to two or more adsorption towers.

The condenser includes a cooling water inlet 31 and a cooling water outlet 32. The cooling water flows in through the cooling water inlet 31 provided outside and the used cooling water is discharged through the cooling water outlet 32. [ The condenser receives the refrigerant from the adsorption towers of the first and second adsorption towers (21, 22), which are in the desorption process, and uses the cooling water to condense the refrigerant. Again, this cooling process proceeds according to the driving sequence of the adsorption refrigerator.

 As described above, the module expansion type adsorption refrigerator system 1000 according to the present embodiment uses a plurality of adsorption type refrigeration modules C1, C2, C3, ..., Cn, and each adsorption type refrigeration module C1, C2, C3, ..., Cn. Cn) and cold water cooled therefrom are effectively distributed to realize a large-capacity cooling capacity.

Particularly, the cooling water supply pump 210 and the cold water recovery pump 310, which are used for driving a plurality of adsorption type refrigeration modules, are not used for each refrigeration module but are shared by the refrigerator system 1000, The control for the control and the order of the supply is controlled through the control unit installed in each module. Therefore, the refrigerator system can be effectively implemented without using a pump as many as the number of modules.

In particular, such adsorption refrigeration modules (C1, C2, C3, ... Cn) are designed such that, for example, a unit module optimally designed in 10RT units is designed and the number of modules is parallelized by the amount required for the corresponding refrigerator system, It can be used as a system. Particularly, since it is possible to drive while controlling the number of modules to be driven at the partial load, there is an advantage that the cooling efficiency can be improved and the energy of the cold water and cooling water pump can be saved.

Sequential interval drive of refrigeration module

 The refrigerator system 1000 combined with a plurality of adsorber refrigeration modules (C1, C2, C3, ... Cn) as shown in Figures 1a and 1b must have a unique driving mechanism. In a chiller system connected by simply n adsorption refrigeration modules, each refrigeration module has the same cycle of adsorption and desorption when operated at the same time at the same start. Therefore, the cooling capacity hunting occurs because the points where the adsorption capacity is minimized and maximized are the same. In addition, hot water at the time of desorption takes a maximum amount of heat at the beginning and thereafter the heat consumption is reduced. In this case, efficient use of hot water becomes difficult.

 In applying the refrigeration module, it is necessary to control each module so as to have a separate cycle, so that it is necessary to control the driving cycle of each refrigeration module. The main control unit 100 plays this role.

 The cooling water supply unit 200, the cooling water recovery unit 300, the hot water supply unit 400, and the main controller 100 (not shown) are provided in addition to the adsorption type refrigeration modules C1, C2, ). The main controller 100 not only controls the driving of each of the adsorption refrigeration modules C1, C2, C3, ..., Cn but also controls the operation of each of the cooling water supplier 200, the cooling water collector 300 and the hot water supplier 400 ), And controls the flow of cooling water, cold water, and hot water in connection with the evaporation side regulating unit and the condensation side regulating unit in the adsorption type refrigeration module connected to the refrigeration unit.

Since an even frozen amount should be distributed to the individual refrigeration modules C1, C2, C3, ..., Cn, the supply of cooling water and the supply of cold water proceed in a sequential manner. The cooling water supply unit 200 includes a cooling water supply pump 210, a cooling water supply entrance pipe 220 and a cooling water supply pipe 230. The cooling water is used to liquefy the recovered refrigerant vapor and provide it to the evaporation side. Since the throughput of each refrigeration module should be uniform, the supply of cooling water should be distributed equally. Accordingly, the cooling water supply inlet pipe 220 and the cooling water supply inlet pipe 230 in the cooling water supply part 200 supply the cooling water to the condensers of the respective freezing modules in the order of one direction, The cooling water is uniformly provided in such a manner that the cooling water is recovered from the condenser of the refrigeration module of the refrigeration module.

In addition, if necessary, the supply amount can be forcibly controlled so as to supply only a predetermined amount of cooling water by the condensation side regulating unit in the module. If a uniform amount of cooling water is not supplied through the cooling water supply inlet pipe 220 and the cooling water supply pipe 230, a separate control device may be utilized.

Likewise, the recovery of cold water is also driven by the same mechanism. Since it is necessary to recover an even frozen amount, it is necessary to supply cold water evenly to each individual freezing module and recover it. The cold water supply unit 300 includes a cold water recovery pump 310, a cold water supply inlet pipe 320, and a cold water outlet pipe 330. The cold water supply inlet pipe 320 and the cold water outlet water inlet pipe 330 in the cold water supply part 300 are arranged in the order of one direction so as to distribute the supply and recovery of the cold water uniformly, The cold water is supplied to the evaporator and the cold water is cooled and recovered evenly in such a manner that the cold water is recovered from the evaporator of each refrigeration module in the order of the supplied directions. It should be noted that the order of supplying the cold water must be the same as the order of supplying the cooling water.

Each of the refrigeration modules C1, C2, C3, ..., Cn is driven not only sequentially but also sequentially with a constant interval. At this time, the interval may be a value obtained by dividing n, the number of refrigeration modules, by the total sum of the adsorption cycle time, the desorption cycle time, and the stabilization time applied to the adsorption tower in the refrigeration module.

For example, in the case where the basic adsorption time of one adsorption refrigeration module is about 420s and the time of 60s is the stabilization time, the cycle of the adsorption tower composed of two adsorption towers consists of adsorption time, stabilization time and desorption time. In this case, 420s of adsorption / desorption, 60s of stabilization and 420s of desorption / adsorption are used, resulting in a total of 900s. Therefore, assuming that n refrigeration modules are used in this case, they have an interval of 900 / ns.

All adsorption chillers shut down the system with the desorption completely finished when the system is stopped. Then, at the time of the regeneration, the adsorption tower in which the desorption is completely finished starts to be adsorbed, and the remaining adsorption tower starts to desorb.

Therefore, it is preferable that the adsorption is maintained for 420 s, and the cycle stabilization preparation and the adsorption are alternately performed. Therefore, it is preferable that the operation control of the n adsorption type refrigerators is sequentially started at 420s / n, which is the adsorption time 420s divided by n . In this case, the operation is performed sequentially from the first unit to the nth unit at an interval of 420 s / n, so that the minimum cooling capacity and the maximum value do not overlap with each refrigerator, so that a certain cooling capacity can be secured.

In addition, there is an advantage that the hot water use calorie can be used close to the average, and even if the logarithm increases, all the refrigerators are operated within at least 420 seconds, so that it is possible to quickly follow the required cooling load.

Control logic of refrigerator system

FIG. 2 is a flowchart illustrating the driving of the module expanding type absorption refrigerator system according to the embodiment of FIG. Referring to FIG. 2, there is shown a control logic in which a module expandable adsorber refrigerator system 1000 according to the embodiment of FIG. 1 is driven.

First, it is checked whether the total number of freezing modules is one (S10). If the module is composed of one module, separate control is not necessary. In addition, it is checked whether the entire drive start cycle is completed and all the combined refrigeration modules are driven (S20). In this case, since sequential driving has been completed, it is possible to proceed with the operation of stopping the driving after confirming whether the stopping process is proceeding.

The total cycle of the adsorption tower consisting of the number of the entire refrigeration modules, the adsorption time, the stabilization time, and the desorption time, and the order of the modules that have been currently driven are calculated (S30). Then, it is checked whether the current drive time corresponds to the interval of the next cycle (S40). If the current time corresponds to the start-up interval between the freezing modules, the start-up is changed according to the current cold water inlet temperature.

In this control logic, the 'operation' and the 'stop' driving of the entire refrigerator system are controlled in consideration of the operating temperature (ot) and the stop temperature (ct) of the refrigerator according to the temperature (t) of the present cold water. If the current cold water temperature t that can be detected at the cold water inlet side after the interval progresses is higher than the operating temperature ot of the freezer, the sequential operation of the freezing module is continued. Therefore, the freezing module of the next order is started to increase the freezing amount of the entire refrigerator system.

When the present cold water temperature t is lower than the stop temperature ct of the refrigerator, it is determined that the current refrigeration state is the supercooled state, so that the 'stop' driving is controlled. Accordingly, the freezing modules currently being driven are sequentially stopped. The most recently driven refrigeration module is sequentially stopped in the order of stopping first.

If the present cold water temperature (t) is between the refrigerator stop temperature (ct) and the operating temperature (ot), no further cooling module is driven or stopped and the current driving state is maintained until the next interval.

Quantitative control of cold and coolant pumps

3 is a flowchart illustrating an algorithm for driving a cold water and cooling water pump of a module expansion type absorption refrigerator system according to another embodiment of the present invention. The module extended adsorber refrigerator system should control the amount of cooling water or cold water provided according to the number of refrigeration modules being driven in the present situation. In this case, by controlling the number of revolutions of the cooling water supply pump 210 and the cold water recovery pump 310, it is possible to control the quantities of the provided cooling water and cold water.

 The cooling water supply pump 210 and the cold water recovery pump 310 always change the number of revolutions of each driven pump according to the number (active n) of the refrigeration modules currently being operated. The Hz of each pump is set according to the number of freezing modules already operating and the Hz for each pump is determined according to the number of modules currently operating. If one refrigeration module is stopped sequentially according to the current temperature condition, the corresponding Hz must be reduced accordingly. If the refrigeration module is to be driven sequentially due to a high temperature condition, And therefore, the Hz should be increased.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1000: Modular expansion type absorption chiller system
C1, C2, C3, C4: first to fourth adsorption refrigeration modules
100:
200: Cooling water supply part
300: Cooling water recovery unit
400: Hot water supply
10: Evaporator
11: cold water inlet
12: cold water outlet
18: evaporation side regulating section
21: First adsorption tower
22: Second adsorption tower
30: condenser
31: Cooling water inlet
32: Cooling water outlet
38: condensation side regulator
210: Cooling water supply pump
220: cooling water supply entrance pipe
230: Cooling water supply entrance pipe
310: cold water recovery pump
320: cold water supply entrance pipe
330: Cold water outlet entrance hall

Claims (5)

n adsorption refrigeration modules; A main controller for controlling driving of the n adsorption refrigeration modules; A cooling water supply unit; A cold water recovery unit; And a hot water supply unit,
Wherein each of the n adsorption refrigeration modules comprises:
An evaporator including a cold water inlet and a cold water outlet; A evaporation side regulating unit for regulating the cold water inlet and the cold water outlet; At least two adsorption towers comprising an adsorbent; A condenser including a cooling water inlet and a cooling water outlet; And a condensation side regulating unit for regulating the cooling water inlet and the cooling water outlet,

The cooling water supply unit,
Cooling water supply pump; A cooling water supply inlet pipe for supplying cooling water to the cooling water inlet of each of the adsorption refrigeration modules in the order of the first direction; And a cooling water outflow advancement pipe for recovering cooling water from the cooling water outlets of the respective absorption refrigeration modules in the order of the first direction,

The cold water-
Cold water recovery pump; A cold water supply inlet pipe for supplying cold water to the cold water inlet for supplying cold water to the cold water inlet of each of the adsorption type freezing modules in the order of the first direction; And a cold water outflow advancement pipe for recovering cold water from the cold water outlets of the respective absorption refrigeration modules in the order of the first direction,

The main control unit,
The control unit controls the flow of cooling water, cold water, and hot water in conjunction with the evaporation side regulating unit and the condensation side regulating unit in each adsorption refrigeration module connected to the cooling water supply unit, the cold water recovery unit, and the hot water supply unit,
(T1 + t2 + m) / n, wherein each of the n adsorption refrigeration modules sequentially drives the respective adsorption refrigeration modules in the order of the first direction, and the interval for driving the adsorption refrigeration module is
T1 = t2 = 420s and m = 60s,
Wherein the cooling water supply pump is constituted by one or more pumps and supplies a predetermined amount of cooling water to the cooling water supply entrance pipe and a predetermined amount of the cooling water is supplied corresponding to the number of the absorption refrigeration modules moving in the order of the first direction,
The cooling water supply pump and the cold water recovery pump may be arranged such that the number of revolutions of each driven pump is varied according to the number of currently operating adsorption refrigeration modules and that one adsorption refrigeration module is stopped sequentially Wherein each pump also reduces Hz, and when the adsorption type refrigeration module is sequentially driven due to a high temperature condition, the Hz of each pump is increased. (Wherein t1 is an adsorption cycle time, t2 is a desorption Cycle time, and m is the stabilization time).
delete delete delete n adsorption refrigeration modules; A main controller for controlling driving of the n adsorption refrigeration modules; A cooling water supply unit; And a cold water recovery unit, the method comprising:
Wherein each of the n adsorption refrigeration modules comprises:
An evaporator including a cold water inlet and a cold water outlet; A evaporation side regulating unit for regulating the cold water inlet and the cold water outlet; At least two adsorption towers comprising an adsorbent; A condenser including a cooling water inlet and a cooling water outlet; And a condensation side regulating unit for regulating the cooling water inlet and the cooling water outlet,
The method of driving the module expansion type adsorption refrigerator includes:
Reviewing the number of total adsorption refrigeration modules;
Checking whether all of the combined adsorption refrigeration modules have been driven when the entire drive start cycle is completed;
Calculating the total cycle of the adsorption tower consisting of the number of total adsorption refrigeration modules, the adsorption time, the stabilization time, and the desorption time; And
And checking whether the current drive time corresponds to an interval of the next cycle,
Wherein the main controller drives each of the n adsorption refrigeration modules in the order of the first direction and the interval for driving the adsorption refrigeration module is (t1 + t2 + m) / n,
T1 = t2 = 420s and m = 60s,
If it is determined that the current driving time corresponds to the next cycle interval, if the current time corresponds to the startup interval between the adsorption type refrigeration modules, the operating temperature and the stop temperature of the module expansion type adsorption type refrigerator The 'operation' and 'stop' driving of the entire module expansion type absorption refrigerator system is controlled,
Wherein when the current cold water temperature is higher than the operating temperature of the module expansion type adsorption type refrigerating machine, the mobile adsorption type refrigeration module sequentially starts the adsorption type freezing module, and if the current cold water temperature is lower than the stop temperature of the module expansion type adsorption type freezer, If the present chilled water temperature is between the stop temperature and the operating temperature of the module expansion type chiller, the driving / stopping of the additional chiller module is not proceeded, and the current driving state is maintained until the next interval (Wherein t1 is the adsorption cycle time, t2 is the desorption cycle time, and m is the stabilization time).

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