CN110068089B - Energy-saving air conditioning system for library - Google Patents
Energy-saving air conditioning system for library Download PDFInfo
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- CN110068089B CN110068089B CN201910456897.1A CN201910456897A CN110068089B CN 110068089 B CN110068089 B CN 110068089B CN 201910456897 A CN201910456897 A CN 201910456897A CN 110068089 B CN110068089 B CN 110068089B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000000498 cooling water Substances 0.000 claims abstract description 94
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000005485 electric heating Methods 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/54—Free-cooling systems
Abstract
The present disclosure relates to an energy-saving air conditioning system for a library, the system comprising: the cooling water unit is used for providing cooling water for the constant temperature and humidity unit; a chilled water unit for providing chilled water to the constant temperature and humidity unit; a natural cold water unit for providing natural cold water for the constant temperature and humidity unit; the constant temperature and humidity unit comprises a compressor, a surface cooler and a fan, and receives a control signal of the control unit to refrigerate the load; the control unit comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of the air conditioner, and the controller is used for controlling the constant temperature and humidity unit to realize temperature and humidity control. The air conditioning system can realize safe and energy-saving operation of the air conditioning system through switching of the multiple water-cooling cold sources.
Description
Technical Field
The disclosure relates to the technical field of energy conservation and environmental protection, in particular to an energy-saving air conditioning system for a library.
Background
The reading room of public library building is generally comparatively open and daylighting is sufficient, and indoor humiture is more easily disturbed by external environment and produces great humiture fluctuation, and when reader's quantity is more in addition, there is stronger demand to the fresh air volume, and indoor humiture is more difficult to control, and in extremely hot or extremely cold weather, indoor air conditioning system is for adjusting suitable environment, often needs to consume huge energy. Meanwhile, most of book storage is in a closed environment, and books, particularly books, are more required to be suitable for temperature and humidity than reading rooms, so that the temperature and humidity environment needs to be regulated in real time by a more precise air conditioner, humidification and dehumidification can be alternately performed at different time intervals in one day due to humidity change, and electric power energy is consumed.
The air-conditioning system of the existing public library mainly comprises an air-cooled air conditioner, and the air-cooled air conditioner is simple in structure and convenient to maintain, but high in energy efficiency and serious in energy consumption. When the water-cooled air conditioner is adopted, if a cooling water system is adopted, the air conditioning units are required to be cooled for the second time by the compressors, the energy consumption is still higher, when the chilled water system is adopted, the problem that the chilled units are damaged due to the shock of the chilled units when the load is smaller can occur, and meanwhile, the energy-saving operation cannot be carried out by utilizing natural cold water in winter in the mode.
Accordingly, there is a need to provide one or more solutions that at least address the above-mentioned problems.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
It is an object of the present disclosure to provide an energy-saving air conditioning system for a library, which overcomes one or more of the problems due to the limitations and disadvantages of the related art, at least to some extent.
According to one aspect of the present disclosure, there is provided an energy-saving air conditioning system for a library, comprising:
the cooling water unit 201 comprises a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the closed cooling tower is connected with the plate heat exchanger through a cooling water pipeline and then is connected with the constant temperature and humidity unit 204 to form a cooling water loop, cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the cooling water pipeline to ensure the cooling water circulation in the cooling water loop;
the chilled water unit 202 comprises an open cooling tower, a refrigerating unit and a circulating pump, wherein the open cooling tower is connected with the refrigerating unit through a chilled water pipeline and then connected with the constant temperature and humidity unit 204 to form a chilled water loop, chilled water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the chilled water pipeline to ensure chilled water circulation in the chilled water loop;
the natural cooling water unit 203 comprises an open cooling tower, a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the open cooling tower is connected with the closed cooling tower in parallel and is connected with the plate heat exchanger through a natural cooling water pipeline, and then is connected with the constant temperature and humidity unit 204 to form a natural cooling water loop, natural cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the natural cooling water pipeline to ensure natural cooling water circulation in the natural cooling water loop;
the constant temperature and humidity unit 204 comprises a compressor, a first surface cooler, a second surface cooler, a third surface cooler and a fan, wherein the compressor is connected with the cooling water unit 201, a cold source is provided for the compressor through cooling water circulation, and refrigerating air quantity is formed through the first surface cooler and the fan to refrigerate a load; the second surface cooler is connected with the chilled water unit 202, and forms refrigerating air quantity with the fan through the second surface cooler to refrigerate the load; the third surface cooler is connected with the natural cold water unit 203, and forms refrigeration air quantity with the fan through the third surface cooler to refrigerate for load;
the control unit 205 comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of an air conditioner, and the constant temperature and humidity unit 204 is controlled by the controller to realize temperature and humidity control, the chilled water temperature control interval is a first temperature difference interval, the cooling water temperature control interval is a second temperature difference interval, and the first temperature difference interval comprises a second temperature difference interval.
In an exemplary embodiment of the present disclosure, the cooling water unit 201 provides the constant temperature and humidity unit 204 with circulating cooling water of 32 degrees celsius water inlet and 37 degrees celsius water return;
the chilled water unit 202 provides circulating chilled water for 6 ℃ water inlet and 12 ℃ water return for the constant temperature and humidity unit 204;
the natural cooling water unit 203 provides 7 ℃ water inlet and 13 ℃ water return circulating natural cooling water for the constant temperature and humidity unit 204.
In an exemplary embodiment of the disclosure, the constant temperature and humidity unit 204 includes a compressor, a first surface cooler, a second surface cooler, and a fan, where the second surface cooler is connected to the natural cold water unit 203, and forms a cooling air volume with the fan through the second surface cooler, so as to cool a load.
In an exemplary embodiment of the present disclosure, the control unit 205 controls the chilled water temperature control interval to be 18-24 degrees celsius temperature difference interval, and the cooling water temperature control interval to be 20-22 degrees celsius temperature difference interval, and the control unit 205 is configured to preferentially use the chilled water for temperature adjustment when the chilled water is present.
In an exemplary embodiment of the present disclosure, further comprising:
the water mixing unit comprises a water mixing pump and a control valve which are arranged between the water supply and return pipelines of the natural cold water pipeline, and is connected with the cooling water unit 201 and used for improving the natural cold water temperature through water mixing when the air temperature is high and the natural cold condition is not provided.
In an exemplary embodiment of the disclosure, the water mixing unit is configured to raise the natural cold water outlet water temperature to a preset temperature range by adjusting the water mixing pump and a control valve linked with the water mixing pump when the outlet water temperature is determined to be lower than a preset low temperature threshold, for example, the preset low temperature threshold may be 7 degrees celsius, and raise the natural cold water outlet water temperature to the preset temperature range, for example, to within the preset temperature range above 16 degrees celsius by adjusting the water mixing pump and the control valve linked with the water mixing pump when the outlet water temperature is lower than 7 degrees celsius, so as to prevent the compressor of the constant temperature and humidity unit 204 from generating liquid impact due to the excessively low water supply temperature.
In an exemplary embodiment of the present disclosure, the constant temperature and humidity unit 204 further includes:
the humidifier is used for receiving the signal of the control unit 205 to realize humidity adjustment when the humidity is too low;
and the electric heating is used for receiving the signal of the control unit 205 to realize humidity adjustment when the humidity is too high.
In an exemplary embodiment of the disclosure, the humidifier of the constant temperature and humidity unit 204 is an electrothermal humidifier for meeting the requirements of the paper text storage environment of the public library, and the humidifying water source adopts a multi-stage filtration pure water source;
the electric heating is to meet the fire grade requirement of a public library, three-level temperature protection switches are arranged, wherein the first-level temperature protection switch is a return air end 65 ℃ high-temperature alarm signal feedback switch, the second-level temperature protection switch is an electric heating end 95 ℃ self-recovery high-temperature spring switch, and the third-level temperature protection switch is an electric heating end 105 ℃ non-recovery fuse switch.
An energy-saving air conditioning system for a library in an exemplary embodiment of the present disclosure includes: a cooling water unit 201 for supplying cooling water to the constant temperature and humidity unit 204; a chilled water unit 202 for providing chilled water to the constant temperature and humidity unit 204; a natural cooling water unit 203 for providing natural cooling water to the constant temperature and humidity unit 204; the constant temperature and humidity unit 204 comprises a compressor, a surface cooler and a fan, and receives a control signal of the control unit 205 to refrigerate a load; the control unit 205 comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of the air conditioner, and the constant temperature and humidity unit 204 is controlled by the controller to realize temperature and humidity control. On one hand, the multi-cold water source switching based on the cold water temperature is performed to provide a cold source for the air conditioning system according to different outdoor temperatures in different seasons, so that the maximized energy saving effect is realized; on the other hand, by taking further safety measures for the humidifier and the electric heating of the constant temperature and humidity unit 204, the safety and the stability of the air conditioning system in the public library are ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 illustrates a scene diagram of an energy efficient air conditioning system for a library according to an exemplary embodiment of the present disclosure;
fig. 2 illustrates a schematic diagram of an energy efficient air conditioning system for a library according to an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other systems, components, materials, devices, steps, etc. In other instances, well-known structures, systems, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
Referring to fig. 1, there is provided an energy-saving air conditioning system for a library in the present exemplary embodiment, which is applicable to a scene of a large public library; FIG. 2 is a schematic diagram of the energy efficient air conditioning system for a library, which may include the following units:
the cooling water unit 201 comprises a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the closed cooling tower is connected with the plate heat exchanger through a cooling water pipeline and then is connected with the constant temperature and humidity unit 204 to form a cooling water loop, cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the cooling water pipeline to ensure the cooling water circulation in the cooling water loop;
the chilled water unit 202 comprises an open cooling tower, a refrigerating unit and a circulating pump, wherein the open cooling tower is connected with the refrigerating unit through a chilled water pipeline and then connected with the constant temperature and humidity unit 204 to form a chilled water loop, chilled water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the chilled water pipeline to ensure chilled water circulation in the chilled water loop;
the natural cooling water unit 203 comprises an open cooling tower, a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the open cooling tower is connected with the closed cooling tower in parallel and is connected with the plate heat exchanger through a natural cooling water pipeline, and then is connected with the constant temperature and humidity unit 204 to form a natural cooling water loop, natural cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the natural cooling water pipeline to ensure natural cooling water circulation in the natural cooling water loop;
the constant temperature and humidity unit 204 comprises a compressor, a first surface cooler, a second surface cooler, a third surface cooler and a fan, wherein the compressor is connected with the cooling water unit 201, a cold source is provided for the compressor through cooling water circulation, and refrigerating air quantity is formed through the first surface cooler and the fan to refrigerate a load; the second surface cooler is connected with the chilled water unit 202, and forms refrigerating air quantity with the fan through the second surface cooler to refrigerate the load; the third surface cooler is connected with the natural cold water unit 203, and forms refrigeration air quantity with the fan through the third surface cooler to refrigerate for load;
the control unit 205 comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of an air conditioner, and the constant temperature and humidity unit 204 is controlled by the controller to realize temperature and humidity control, the chilled water temperature control interval is a first temperature difference interval, the cooling water temperature control interval is a second temperature difference interval, and the first temperature difference interval comprises a second temperature difference interval.
According to the energy-saving air conditioning system for the library in the example embodiment, on one hand, the energy-saving air conditioning system achieves the maximum energy-saving effect by switching a plurality of cold water sources based on the temperature of cold water to provide cold sources for the air conditioning system according to different outdoor temperatures in different seasons; on the other hand, by taking further safety measures for the humidifier and the electric heating of the constant temperature and humidity unit 204, the safety and the stability of the air conditioning system in the public library are ensured.
Next, the energy-saving air conditioning system for a library in the present exemplary embodiment will be further described.
The cooling water unit 201 comprises a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the closed cooling tower is connected with the plate heat exchanger through a cooling water pipeline and then connected with the constant temperature and humidity unit 204 to form a cooling water loop, cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the cooling water pipeline to ensure cooling water circulation in the cooling water loop.
In the present exemplary embodiment, the cooling water unit 201 provides the constant temperature and humidity unit 204 with circulating cooling water of 32 degrees celsius water inlet and 37 degrees celsius water return.
The chilled water unit 202 comprises an open cooling tower, a refrigerating unit and a circulating pump, wherein the open cooling tower is connected with the refrigerating unit through a chilled water pipeline and then connected with the constant temperature and humidity unit 204 to form a chilled water loop, chilled water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the chilled water pipeline to ensure chilled water circulation in the chilled water loop.
In the present exemplary embodiment, the chilled water unit 202 provides the constant temperature and humidity unit 204 with circulating chilled water with 6 degrees celsius water intake and 12 degrees celsius water return.
The natural cooling water unit 203 comprises an open cooling tower, a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the open cooling tower is connected with the closed cooling tower in parallel and then connected with the plate heat exchanger through a natural cooling water pipeline to form a natural cooling water loop with the constant temperature and humidity unit 204, natural cooling water is provided for the constant temperature and humidity unit 204, and the circulating pump is arranged in the natural cooling water pipeline to ensure natural cooling water circulation in the natural cooling water loop.
In the present exemplary embodiment, the natural cooling water unit 203 supplies the constant temperature and humidity unit 204 with circulating natural cooling water of 7 degrees celsius water inlet and 13 degrees celsius water return.
The constant temperature and humidity unit 204 comprises a compressor, a first surface cooler, a second surface cooler, a third surface cooler and a fan, wherein the compressor is connected with the cooling water unit 201, a cold source is provided for the compressor through cooling water circulation, and refrigerating air quantity is formed through the first surface cooler and the fan to refrigerate a load; the second surface cooler is connected with the chilled water unit 202, and forms refrigerating air quantity with the fan through the second surface cooler to refrigerate the load; the third surface cooler is connected with the natural cold water unit 203, and forms refrigerating air quantity with the fan through the third surface cooler to refrigerate for load.
In this example embodiment, the constant temperature and humidity unit 204 includes a compressor, a first surface cooler, a second surface cooler, and a fan, where the second surface cooler is connected to the natural cooling water unit 203, and forms a cooling air volume with the fan through the second surface cooler, so as to cool the load. That is, when natural cold water is used, the natural cold water and the chilled water can be used as a set of pipelines, the natural cold water is hooked with a water mixing system of a cooling water system at the air-conditioning water supply section, and meanwhile, the natural cold water can also be used as a set of surface cooler coils which are used as a set of surface cooler coils in the constant temperature and humidity unit 204, so that the internal space of a machine set can be saved, and the maintenance workload is reduced.
In this example embodiment, the constant temperature and humidity unit 204 further includes:
the humidifier is used for receiving the signal of the control unit 205 to realize humidity adjustment when the humidity is too low;
and the electric heating device is used for receiving the signal of the control unit 205 to realize humidity adjustment when the humidity is too high.
In this exemplary embodiment, the humidifier of the constant temperature and humidity unit 204 is an electrothermal humidifier to meet the requirements of the paper text storage environment of the public library, and the humidifying water source is a multi-stage filtered pure water source;
in this example embodiment, the electric heating is to meet the fire-proof level requirement of the public library, and three-stage temperature protection switches are provided, wherein the first-stage temperature protection switch is a return air end 65 ℃ high-temperature alarm signal feedback switch, the second-stage temperature protection switch is an electric heating end 95 ℃ self-recovery high-temperature spring switch, and the third-stage temperature protection switch is an electric heating end 105 ℃ non-recovery fuse switch.
The control unit 205 comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of an air conditioner, and the constant temperature and humidity unit 204 is controlled by the controller to realize temperature and humidity control, the chilled water temperature control interval is a first temperature difference interval, the cooling water temperature control interval is a second temperature difference interval, and the first temperature difference interval comprises a second temperature difference interval.
In this exemplary embodiment, the control unit 205 controls the chilled water temperature control interval to be a temperature difference interval of 18-24 degrees celsius, and the cooling water temperature control interval to be a temperature difference interval of 20-22 degrees celsius, and the control unit 205 is configured to preferentially use the chilled water for temperature adjustment when the chilled water exists.
In this example embodiment, the system further comprises:
the water mixing unit comprises a water mixing pump and a control valve which are arranged between the water supply and return pipelines of the natural cold water pipeline, and is connected with the cooling water unit 201 and used for improving the natural cold water temperature through water mixing when the air temperature is high and the natural cold condition is not provided.
In this example embodiment, the water mixing unit is configured to, when the natural cold water outlet water temperature in the transition season and the warm winter is greater than 7 ℃, raise the natural cold water outlet water temperature to above 16 ℃ by adjusting the water mixing pump and the control valve linked with the water mixing pump, and prevent the compressor of the constant temperature and humidity unit 204 from generating a hydraulic shock due to the too low water supply temperature.
Furthermore, the above-described figures are only illustrative of the processes involved in a system according to an exemplary embodiment of the present invention, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (5)
1. An energy efficient air conditioning system for a library, the system comprising:
the cooling water unit comprises a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the closed cooling tower is connected with the plate heat exchanger through a cooling water pipeline and then is connected with the constant temperature and humidity unit to form a cooling water loop, cooling water is provided for the constant temperature and humidity unit, and the circulating pump is arranged in the cooling water pipeline so as to provide cooling water circulation in the cooling water loop;
the refrigerating water unit comprises an open cooling tower, a refrigerating unit and a circulating pump, wherein the open cooling tower is connected with the refrigerating unit through a refrigerating water pipeline and then connected with the constant temperature and humidity unit to form a refrigerating water loop, refrigerating water is provided for the constant temperature and humidity unit, and the circulating pump is arranged in the refrigerating water pipeline so as to provide refrigerating water circulation in the refrigerating water loop;
the natural cooling water unit comprises an open cooling tower, a closed cooling tower, a plate heat exchanger and a circulating pump, wherein the open cooling tower is connected with the closed cooling tower in parallel and is connected with the plate heat exchanger through a natural cooling water pipeline, and then is connected with the constant temperature and humidity unit to form a natural cooling water loop, natural cooling water is provided for the constant temperature and humidity unit, and the circulating pump is arranged in the natural cooling water pipeline so as to provide natural cooling water circulation in the natural cooling water loop;
the constant temperature and humidity unit comprises a compressor, a first surface cooler, a second surface cooler, a third surface cooler and a fan, wherein the compressor is connected with the cooling water unit, a cold source is provided for the compressor through cooling water circulation, and refrigerating air quantity is formed through the first surface cooler and the fan to refrigerate a load; the second surface cooler is connected with the chilled water unit, and forms refrigerating air quantity with the fan through the second surface cooler to refrigerate for load; the third surface cooler is connected with the natural cold water unit, forms refrigerating air quantity through the third surface cooler and the fan, and is used for load refrigeration;
the control unit comprises a temperature and humidity detector and a controller, wherein the temperature and humidity detector is used for detecting the temperature and humidity of return air of the air conditioner, and controlling the constant temperature and humidity unit to control the temperature and humidity through the controller, wherein the chilled water temperature control interval is a first temperature difference interval, the cooling water temperature control interval is a second temperature difference interval, and the first temperature difference interval comprises a second temperature difference interval;
the cooling water unit provides circulating cooling water for the constant temperature and humidity unit, wherein the circulating cooling water is used for feeding water at the temperature of 32 ℃ and returning water at the temperature of 37 ℃;
the chilled water unit provides circulating chilled water of water return at the temperature of 12 ℃ for the constant temperature and humidity unit, wherein the water inlet at the temperature of 6 ℃;
the natural cold water unit provides 7 ℃ water inflow and 13 ℃ water return circulating natural cold water for the constant temperature and humidity unit;
the constant temperature and humidity unit comprises a compressor, a first surface cooler, a second surface cooler and a fan, wherein the second surface cooler is connected with the natural cold water unit, and forms refrigeration air quantity with the fan through the second surface cooler to refrigerate for load;
the control unit is used for controlling the temperature control interval of the chilled water to be 18-24 ℃ and the temperature control interval of the cooling water to be 20-22 ℃, and the control unit is used for preferentially using the chilled water to carry out temperature regulation when the chilled water exists.
2. The system as recited in claim 1, further comprising:
the water mixing unit comprises a water mixing pump and a control valve which are arranged between the water supply and return pipelines of the natural cold water pipeline, and is connected with the cooling water unit and used for improving the natural cold water temperature through mixing water when the air temperature is high and the natural cold condition is not met.
3. The system of claim 2, wherein the mixing unit is configured to raise the natural cold water outlet water temperature to a preset temperature range by adjusting the mixing water pump and a control valve coupled to the mixing water pump when the outlet water temperature is determined to be lower than a preset low temperature threshold.
4. The system of claim 1, wherein the constant temperature and humidity unit further comprises:
the humidifier is used for realizing humidity adjustment when the humidity is too low according to the received control unit signal;
and the electric heating is used for realizing humidity adjustment when the humidity is too high according to the received control unit signal.
5. The system of claim 4, wherein the humidifier of the constant temperature and humidity unit is an electrothermal humidifier, and the humidifying water source adopts a multi-stage filtering pure water source;
the electric heating device is characterized in that a three-level temperature protection switch is arranged in the electric heating mode, wherein the first-level temperature protection switch is a return air end 65 ℃ high-temperature alarm signal feedback switch, the second-level temperature protection switch is an electric heating end 95 ℃ self-recovery high-temperature spring switch, and the third-level temperature protection switch is an electric heating end 105 ℃ non-recovery fuse switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910456897.1A CN110068089B (en) | 2019-05-29 | 2019-05-29 | Energy-saving air conditioning system for library |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910456897.1A CN110068089B (en) | 2019-05-29 | 2019-05-29 | Energy-saving air conditioning system for library |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110068089A CN110068089A (en) | 2019-07-30 |
| CN110068089B true CN110068089B (en) | 2024-03-15 |
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Family Applications (1)
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