CN211084317U - High-efficient building freezer room - Google Patents
High-efficient building freezer room Download PDFInfo
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- CN211084317U CN211084317U CN201922009435.3U CN201922009435U CN211084317U CN 211084317 U CN211084317 U CN 211084317U CN 201922009435 U CN201922009435 U CN 201922009435U CN 211084317 U CN211084317 U CN 211084317U
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Abstract
The utility model relates to a high-efficient building refrigerating machine room, refrigerating machine room comprises dehumidification unit, cooling unit and the control unit. The control unit calculates the temperature of the outlet of the hot side of the low-temperature (high-temperature) heat exchanger in real time based on a built-in approximation degree calculation model of the low-temperature (high-temperature) cooling tower and a heat conservation calculation model of the low-temperature (high-temperature) heat exchanger, and controls the dehumidification (cooling) unit according to the temperature of the outlet of the hot side of the low-temperature (high-temperature) heat exchanger to obtain a mechanical refrigeration mode, a mixed refrigeration mode and a natural cooling mode. This freezer room is through adopting humiture independent control to realize long and the increase substantially of nature cold source utilization ratio when the nature cold source utilizes, has solved the problem that the unable deep utilization nature cold source of conventional freezer room, realizes freezer room's high-efficient operation.
Description
Technical Field
The utility model relates to a refrigerating machine room, concretely relates to high-efficient building refrigerating machine room.
Background
In modern buildings, more than half of the energy is consumed by a central air conditioner, wherein a refrigerating machine room is the place with the largest specific gravity of energy consumption, and the reduction of the energy consumption of the refrigerating machine room becomes the key point of energy conservation and emission reduction of operators. The full utilization of natural cold source is the path which reduces the energy consumption of the air conditioner in the machine room, has the largest application space and the most obvious energy-saving effect. The utilization rate of the natural cold source is influenced by the temperature of refrigeration water supply and return, in a conventional refrigeration machine room, the temperature of the refrigeration water supply is 7 ℃, the temperature of the refrigeration water return is 12 ℃, and the temperature of the refrigeration water supply and return of the existing refrigeration machine room is lower, so that the further improvement of the utilization rate of the natural cold source is limited.
Temperature and humidity independent control adopts two kinds of different evaporating temperature's cold source, and the wet load is born to the low temperature refrigerated water, and the heat load is born to the high temperature refrigerated water, and the high temperature refrigerated water replaces the most low temperature refrigerated water of conventional freezer room, because evaporating temperature's increase, freezer room cooling water set efficiency obtains increasing substantially on the one hand, and the improvement of increasing substantially of length and natural cold source utilization ratio can be realized to the high temperature refrigerated water on the other hand when natural cold source utilizes.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a high-efficient building refrigerating machine room and control method thereof, based on humiture independent control, utilize high temperature refrigerated water to replace most low temperature refrigerated water of conventional refrigerating machine room, when the cooling water set energy consumption reduces by a wide margin, can realize the deep level utilization of nature cold source for building refrigerating machine room high efficiency energy saving operation.
The utility model discloses a realize through following technical scheme:
a high-efficiency building refrigerating machine room comprises a dehumidifying unit, a cooling unit and a control unit; the dehumidification unit comprises a low-temperature water chilling unit, a low-temperature chilled water pump, a low-temperature cooling tower, a low-temperature chilled water pump, a low-temperature heat exchanger, a first dehumidification valve, a second dehumidification valve, a third dehumidification valve, a fourth dehumidification valve, a low-temperature chilled water supply temperature sensor, a low-temperature chilled return water temperature sensor and a low-temperature chilled water flow sensor; the cooling unit comprises a high-temperature water chilling unit, a high-temperature freezing water pump, a high-temperature cooling tower, a high-temperature cooling water pump, a high-temperature heat exchanger, a first cooling valve, a second cooling valve, a third cooling valve, a fourth cooling valve, a high-temperature freezing water supply temperature sensor, a high-temperature freezing water return temperature sensor and a high-temperature freezing water flow sensor; the low-temperature cooling tower, the low-temperature heat exchanger and the low-temperature cooling water pump are sequentially connected to form a low-temperature cooling water circulation loop; the low-temperature chilled water flow sensor, the fourth dehumidification valve, the low-temperature chilled return water temperature sensor, the first dehumidification valve, the low-temperature chilled water supply temperature sensor and the low-temperature chilled water pump are sequentially connected to form a low-temperature chilled water mechanical cooling branch; the low-temperature chilled water flow sensor, the third dehumidification valve, the low-temperature freezing return water temperature sensor, the first dehumidification valve, the low-temperature freezing water supply temperature sensor and the low-temperature freezing water pump are sequentially connected to form a low-temperature chilled water mixing cold supply branch; the low-temperature chilled water flow sensor, the third dehumidification valve, the low-temperature refrigeration backwater temperature sensor, the second dehumidification valve, the low-temperature refrigeration water supply temperature sensor and the low-temperature refrigeration water pump are sequentially connected to form a low-temperature chilled water natural cooling branch; the high-temperature cooling tower, the high-temperature heat exchanger and the high-temperature cooling water pump are sequentially connected to form a high-temperature cooling water circulation loop; the high-temperature chilled water flow sensor, the fourth dehumidification valve, the high-temperature chilled return water temperature sensor, the first dehumidification valve, the high-temperature chilled water supply temperature sensor and the high-temperature chilled water pump are sequentially connected to form a high-temperature chilled water mechanical cooling branch; the high-temperature chilled water flow sensor, the third dehumidification valve, the high-temperature refrigeration backwater temperature sensor, the first dehumidification valve, the high-temperature refrigeration water supply temperature sensor and the high-temperature refrigeration water pump are sequentially connected to form a high-temperature chilled water mixing cold supply branch; the high-temperature chilled water flow sensor, the third dehumidification valve, the high-temperature freezing return water temperature sensor, the second dehumidification valve, the high-temperature freezing water supply temperature sensor and the high-temperature freezing water pump are sequentially connected to form a high-temperature chilled water natural cooling branch.
As an improvement of the scheme, the low-temperature heat exchanger adopts a counter-flow plate heat exchanger, and the flow direction of low-temperature chilled water is opposite to that of cooling water flowing through a low-temperature cooling tower; the high-temperature heat exchanger adopts a counter-flow plate type heat exchanger, and the flow direction of high-temperature chilled water is opposite to that of cooling water flowing through a high-temperature cooling tower.
As an improvement of the scheme, the low-temperature heat exchanger adopts a counter-flow plate heat exchanger, and the flow direction of low-temperature chilled water is opposite to that of cooling water flowing through a low-temperature cooling tower; the high-temperature heat exchanger adopts a counter-flow plate type heat exchanger, and the flow direction of high-temperature chilled water is opposite to that of cooling water flowing through a high-temperature cooling tower.
When the temperature of the hot side outlet of the low-temperature heat exchanger is higher than the temperature of the return water of the low-temperature water chilling unit, opening a first dehumidification valve and a fourth dehumidification valve, closing a second dehumidification valve and a third dehumidification valve, and opening a mechanical refrigeration mode by a dehumidification unit; when the temperature of the hot side outlet of the low-temperature heat exchanger is lower than the return water temperature of the low-temperature water chilling unit and higher than the water supply temperature of the low-temperature water chilling unit, the first dehumidification valve and the third dehumidification valve are opened, the second dehumidification valve and the fourth dehumidification valve are closed, and the dehumidification unit starts a hybrid refrigeration mode; and when the temperature of the hot side outlet of the low-temperature heat exchanger is lower than the temperature of the water supply of the low-temperature water chilling unit, opening the second dehumidification valve and the third dehumidification valve, closing the first dehumidification valve and the fourth dehumidification valve, and opening a natural cooling mode by the dehumidification unit.
When the temperature of the outlet at the hot side of the high-temperature heat exchanger is higher than the temperature of the return water of the high-temperature water chilling unit, opening a first cooling valve and a fourth cooling valve, closing a second cooling valve and a third cooling valve, and opening a mechanical refrigeration mode by a cooling unit; when the temperature of the outlet at the hot side of the high-temperature heat exchanger is lower than the return water temperature of the high-temperature water chilling unit and higher than the water supply temperature of the high-temperature water chilling unit, the first cooling valve and the third cooling valve are opened, the second cooling valve and the fourth cooling valve are closed, and the cooling unit opens a mixed refrigeration mode; when the temperature of the outlet at the hot side of the high-temperature heat exchanger is lower than the temperature of the water supply of the high-temperature water chilling unit, the second cooling valve and the third cooling valve are opened, the first cooling valve and the fourth cooling valve are closed, and the natural cooling mode is opened by the cooling unit.
This freezer room utilizes high temperature refrigerated water to replace most low temperature refrigerated water of conventional freezer room based on humiture independent control, when the cooling water set energy consumption reduces by a wide margin, can realize the deep utilization of nature cold source for building freezer room energy-efficient operation.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the dehumidification (cooling) unit of the refrigerating machine room realizes heat exchange between cooling water and low-temperature (high-temperature) chilled water by adopting the low-temperature (high-temperature) heat exchanger, and ensures that the water quality of the low-temperature (high-temperature) chilled water is not polluted while the utilization of a natural cold source is realized; the low-temperature (high-temperature) heat exchanger adopts a counter-flow plate type heat exchanger, the flow direction of low-temperature (high-temperature) freezing water is opposite to the flow direction of cooling water flowing through a low-temperature (high-temperature) cooling tower, and efficient heat exchange of the heat exchanger is realized.
2. The temperature and humidity are independently controlled, energy consumption of the refrigerating machine room is greatly reduced, and the refrigerating machine room has obvious energy-saving potential compared with a conventional refrigerating machine room.
3. The refrigeration machine room is based on independent temperature and humidity control, high-temperature chilled water is used for replacing most of low-temperature chilled water of a conventional refrigeration machine room, deep utilization of a natural cold source is achieved, and the building refrigeration machine room is efficient and energy-saving in operation.
Drawings
Fig. 1 is the schematic view of the dehumidification unit composition of the high-efficiency building refrigerating machine room of the utility model.
Fig. 2 is the cooling unit composition schematic diagram of the high-efficiency building refrigerating machine room.
Description of reference numerals: 11-a low-temperature water chilling unit; 12-cryogenic chilled water pump; 13-a first dehumidification valve; 14-a second dehumidification valve; 15-a cryogenic cooling tower; 16-a cryogenic cooling pump; 17-a cryogenic heat exchanger; 18-a third dehumidification valve; 19-a fourth dehumidification valve; 110-low temperature freezing water supply temperature sensor; 111-low temperature freezing backwater temperature sensor; 112-low temperature chilled water flow sensor; 21-high temperature water chilling unit; 22-high temperature chilled water pump; 23-a first cooling valve; 24-a second cooling valve; 25-high temperature cooling tower; 26-high temperature cooling pump; 27-a high temperature heat exchanger; 28-a third cooling valve; 29-a fourth cool down valve; 210-high temperature freezing water supply temperature sensor; 211-high temperature chilled return water temperature sensor; 212-high temperature chilled water flow sensor.
Detailed Description
Example 1
As shown in fig. 1 and 2, a high-efficiency building refrigerating machine room includes a dehumidifying unit, a cooling unit and a control unit. The dehumidification unit consists of a low-temperature water chilling unit 11, a low-temperature chilled water pump 12, a low-temperature cooling tower 15, a low-temperature cooling water pump 16, a low-temperature heat exchanger 17, a first dehumidification valve 13, a second dehumidification valve 14, a third dehumidification valve 18, a fourth dehumidification valve 19, a low-temperature chilled water supply temperature sensor 110, a low-temperature chilled return water temperature sensor 111 and a low-temperature chilled water flow sensor 112; the cooling unit consists of a high-temperature water chilling unit 21, a high-temperature freezing water pump 22, a high-temperature cooling tower 25, a high-temperature cooling water pump 26, a high-temperature heat exchanger 27, a first cooling valve 23, a second cooling valve 24, a third cooling valve 28, a fourth cooling valve 29, a high-temperature freezing water supply temperature sensor 210, a high-temperature freezing return water temperature sensor 211 and a high-temperature freezing water flow sensor 212.
Wherein, the low-temperature cooling tower 15, the low-temperature heat exchanger 17 and the low-temperature cooling water pump 16 are connected in sequence to form a low-temperature cooling water circulation loop; the low-temperature chilled water flow sensor 112, the fourth dehumidification valve 19, the low-temperature chilled return water temperature sensor 111, the first dehumidification valve 13, the low-temperature chilled water supply temperature sensor 110 and the low-temperature chilled water pump 12 are sequentially connected to form a low-temperature chilled water mechanical cooling branch; the low-temperature chilled water flow sensor 112, the third dehumidification valve 18, the low-temperature chilled return water temperature sensor 111, the first dehumidification valve 13, the low-temperature chilled water supply temperature sensor 110 and the low-temperature chilled water pump 12 are sequentially connected to form a low-temperature chilled water mixed cooling branch; the low-temperature chilled water flow sensor 112, the third dehumidification valve 18, the low-temperature chilled return water temperature sensor 111, the second dehumidification valve 14, the low-temperature chilled water supply temperature sensor 110 and the low-temperature chilled water pump 12 are sequentially connected to form a low-temperature chilled water natural cooling branch.
Wherein, the high-temperature cooling tower 25, the high-temperature heat exchanger 27 and the high-temperature cooling water pump 26 are connected in sequence to form a high-temperature cooling water circulation loop; the high-temperature chilled water flow sensor 212, the fourth dehumidification valve 29, the high-temperature chilled return water temperature sensor 211, the first dehumidification valve 23, the high-temperature chilled water supply temperature sensor 210 and the high-temperature chilled water pump 22 are sequentially connected to form a high-temperature chilled water mechanical cooling branch; the high-temperature chilled water flow sensor 212, the third dehumidification valve 28, the high-temperature chilled return water temperature sensor 211, the first dehumidification valve 23, the high-temperature chilled water supply temperature sensor 210 and the high-temperature chilled water pump 22 are sequentially connected to form a high-temperature chilled water mixed cooling branch; the high-temperature chilled water flow sensor 212, the third dehumidification valve 28, the high-temperature chilled return water temperature sensor 211, the second dehumidification valve 24, the high-temperature chilled water supply temperature sensor 210 and the high-temperature chilled water pump 22 are sequentially connected to form a high-temperature chilled water natural cooling branch.
The dehumidification unit completes heat exchange between cooling water and low-temperature chilled water through the low-temperature heat exchanger 17, and natural cold source utilization is realized while the water quality of the low-temperature chilled water is guaranteed not to be polluted; the cooling unit completes heat exchange between cooling water and high-temperature chilled water through the high-temperature heat exchanger 27, and natural cold source utilization is realized while the water quality of the high-temperature chilled water is ensured not to be polluted; the dehumidification and/or dehumidification unit does not need to additionally add water quality treatment equipment such as a filter.
Wherein, the low-temperature heat exchanger 17 adopts a counter-flow plate heat exchanger, and the flow direction of low-temperature chilled water is opposite to that of cooling water flowing through the low-temperature cooling tower 15; the high temperature heat exchanger 27 is a counter flow plate heat exchanger, and the flow direction of the high temperature freezing water is opposite to that of the cooling water flowing through the high temperature cooling tower 25.
Description of the working principle:
when the temperature of the hot side outlet of the low-temperature heat exchanger 17 is higher than the return water temperature of the low-temperature water chilling unit 11, opening the first dehumidification valve 13 and the fourth dehumidification valve 19, closing the second dehumidification valve 14 and the third dehumidification valve 18, and opening a mechanical refrigeration mode of the dehumidification unit; when the temperature of the hot side outlet of the low-temperature heat exchanger 17 is lower than the return water temperature of the low-temperature water chilling unit 11 and higher than the water supply temperature of the low-temperature water chilling unit 11, the first dehumidification valve 13 and the third dehumidification valve 18 are opened, the second dehumidification valve 14 and the fourth dehumidification valve 19 are closed, and the dehumidification unit starts a mixed refrigeration mode; when the temperature of the hot side outlet of the low-temperature heat exchanger 17 is lower than the water supply temperature of the low-temperature water chilling unit 11, the second dehumidification valve 14 and the third dehumidification valve 18 are opened, the first dehumidification valve 13 and the fourth dehumidification valve 19 are closed, and the dehumidification unit is opened in a natural cooling mode. Table 1 shows the states of the water chiller, the water pump, the cooling tower and the valve in different operation modes of the dehumidification unit;
TABLE 1
When the temperature of the outlet at the hot side of the high-temperature heat exchanger 27 is higher than the return water temperature of the high-temperature water chilling unit 21, the first cooling valve 23 and the fourth cooling valve 29 are opened, the second cooling valve 24 and the third cooling valve 28 are closed, and the cooling unit starts a mechanical refrigeration mode; when the temperature of the outlet at the hot side of the high-temperature heat exchanger 27 is lower than the return water temperature of the high-temperature water chilling unit 21 and higher than the water supply temperature of the high-temperature water chilling unit 21, the first cooling valve 23 and the third cooling valve 28 are opened, the second cooling valve 24 and the fourth cooling valve 29 are closed, and the cooling unit opens the hybrid refrigeration mode; when the temperature of the outlet at the hot side of the high-temperature heat exchanger 27 is lower than the water supply temperature of the high-temperature water chilling unit 21, the second cooling valve 24 and the third cooling valve 28 are opened, the first cooling valve 23 and the fourth cooling valve 29 are closed, and the natural cooling mode is opened by the cooling unit. Table 2 cooling unit, water pump, cooling tower and valve status table under different operation modes of the cooling unit.
TABLE 2
Based on independent temperature and humidity control, most of low-temperature chilled water in a conventional refrigerating machine room is replaced by high-temperature chilled water, and the deep utilization of a natural cold source can be realized while the energy consumption of a water chilling unit is greatly reduced, so that the building refrigerating machine room can run efficiently and energy-saving.
Claims (3)
1. A high-efficiency building refrigerating machine room is characterized by comprising a dehumidifying unit, a cooling unit and a control unit; the dehumidification unit comprises a low-temperature water chilling unit, a low-temperature chilled water pump, a low-temperature cooling tower, a low-temperature chilled water pump, a low-temperature heat exchanger, a first dehumidification valve, a second dehumidification valve, a third dehumidification valve, a fourth dehumidification valve, a low-temperature chilled water supply temperature sensor, a low-temperature chilled return water temperature sensor and a low-temperature chilled water flow sensor; the cooling unit comprises a high-temperature water chilling unit, a high-temperature freezing water pump, a high-temperature cooling tower, a high-temperature cooling water pump, a high-temperature heat exchanger, a first cooling valve, a second cooling valve, a third cooling valve, a fourth cooling valve, a high-temperature freezing water supply temperature sensor, a high-temperature freezing water return temperature sensor and a high-temperature freezing water flow sensor; the low-temperature cooling tower, the low-temperature heat exchanger and the low-temperature cooling water pump are sequentially connected to form a low-temperature cooling water circulation loop; the low-temperature chilled water flow sensor, the fourth dehumidification valve, the low-temperature chilled return water temperature sensor, the first dehumidification valve, the low-temperature chilled water supply temperature sensor and the low-temperature chilled water pump are sequentially connected to form a low-temperature chilled water mechanical cooling branch; the low-temperature chilled water flow sensor, the third dehumidification valve, the low-temperature freezing return water temperature sensor, the first dehumidification valve, the low-temperature freezing water supply temperature sensor and the low-temperature freezing water pump are sequentially connected to form a low-temperature chilled water mixing cold supply branch; the low-temperature chilled water flow sensor, the third dehumidification valve, the low-temperature refrigeration backwater temperature sensor, the second dehumidification valve, the low-temperature refrigeration water supply temperature sensor and the low-temperature refrigeration water pump are sequentially connected to form a low-temperature chilled water natural cooling branch; the high-temperature cooling tower, the high-temperature heat exchanger and the high-temperature cooling water pump are sequentially connected to form a high-temperature cooling water circulation loop; the high-temperature chilled water flow sensor, the fourth dehumidification valve, the high-temperature chilled return water temperature sensor, the first dehumidification valve, the high-temperature chilled water supply temperature sensor and the high-temperature chilled water pump are sequentially connected to form a high-temperature chilled water mechanical cooling branch; the high-temperature chilled water flow sensor, the third dehumidification valve, the high-temperature refrigeration backwater temperature sensor, the first dehumidification valve, the high-temperature refrigeration water supply temperature sensor and the high-temperature refrigeration water pump are sequentially connected to form a high-temperature chilled water mixing cold supply branch; the high-temperature chilled water flow sensor, the third dehumidification valve, the high-temperature freezing return water temperature sensor, the second dehumidification valve, the high-temperature freezing water supply temperature sensor and the high-temperature freezing water pump are sequentially connected to form a high-temperature chilled water natural cooling branch.
2. A high efficiency building refrigeration machine room as claimed in claim 1, wherein said cryogenic heat exchanger is a counterflow plate heat exchanger, the direction of cryogenic chilled water flow is opposite to the direction of cooling water flow through the cryogenic cooling tower; the high-temperature heat exchanger adopts a counter-flow plate type heat exchanger, and the flow direction of high-temperature chilled water is opposite to that of cooling water flowing through a high-temperature cooling tower.
3. A high efficiency building refrigeration machine room as claimed in claim 1, wherein said cryogenic heat exchanger is a counterflow plate heat exchanger, the direction of cryogenic chilled water flow is opposite to the direction of cooling water flow through the cryogenic cooling tower; the high-temperature heat exchanger adopts a counter-flow plate type heat exchanger, and the flow direction of high-temperature chilled water is opposite to that of cooling water flowing through a high-temperature cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922009435.3U CN211084317U (en) | 2019-11-18 | 2019-11-18 | High-efficient building freezer room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922009435.3U CN211084317U (en) | 2019-11-18 | 2019-11-18 | High-efficient building freezer room |
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| Publication Number | Publication Date |
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| CN211084317U true CN211084317U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922009435.3U Active CN211084317U (en) | 2019-11-18 | 2019-11-18 | High-efficient building freezer room |
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| CN (1) | CN211084317U (en) |
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- 2019-11-18 CN CN201922009435.3U patent/CN211084317U/en active Active
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