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公开(公告)号：US11808483B2
公开(公告)日：2023-11-07
申请号：US17818177
申请日：2022-08-08
CPC分类号： F24F3/065 , F24F11/65 , F24F11/85 , F25B25/005 , F25B49/022 , F25B49/027 , F28F27/003 , F25B2339/047 , Y02B30/54
摘要： Chiller control systems and methods for chiller control use iterative modeling of cooling towers, heat exchangers, and pumps to determine the feasibility of integrated free cooling and the ability to take advantage of free cooling. The control systems and control methods can further include selecting the parameters for operating in the free cooling or integrated free cooling mode to improve efficiency and/or reduce energy consumption when operating in these modes. The models can have inputs and outputs that feed into one another, and converge at a solution over multiple iterations. The feasibility of integrated free cooling can be based on providing cooling to a cooling load process fluid at a heat exchanger. The availability of free cooling can be based on the cooling provided at the heat exchanger achieving a target temperature for the cooling load process fluid.
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公开(公告)号：US11639809B2
公开(公告)日：2023-05-02
申请号：US17039543
申请日：2020-09-30
摘要： Control systems and methods for control of heating, ventilation, air conditioning, and refrigeration (HVACR) systems that include cooling and one or both of heating and heat recovery can include adaptive and balanced modes for each of heating and cooling operations. The adaptive heating and cooling modes each respectively include controlling the HVACR system to achieve a target temperature for the respective heating or cooling process fluid and to unload or stop the compressor when the temperature of a the other of the cooling or heating process fluid exceeds a threshold. The balanced heating and cooling modes respectively include controlling a quantity of flow of the cooling or heating process fluids to meet balanced heating or cooling target temperatures for the respective heating or cooling process fluids and also the other of the cooling or heating process fluid.
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公开(公告)号：US20220099326A1
公开(公告)日：2022-03-31
申请号：US17039543
申请日：2020-09-30
摘要： Control systems and methods for control of heating, ventilation, air conditioning, and refrigeration (HVACR) systems that include cooling and one or both of heating and heat recovery can include adaptive and balanced modes for each of heating and cooling operations. The adaptive heating and cooling modes each respectively include controlling the HVACR system to achieve a target temperature for the respective heating or cooling process fluid and to unload or stop the compressor when the temperature of a the other of the cooling or heating process fluid exceeds a threshold. The balanced heating and cooling modes respectively include controlling a quantity of flow of the cooling or heating process fluids to meet balanced heating or cooling target temperatures for the respective heating or cooling process fluids and also the other of the cooling or heating process fluid.
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公开(公告)号：US11287169B2
公开(公告)日：2022-03-29
申请号：US16015331
申请日：2018-06-22
发明人： Brian T. Sullivan , Lee R. Cline
IPC分类号： F25B49/02
摘要： Cooling systems and methods of controlling a cooling system which includes one or more pumps and one or more fans, wherein the pumps and the fans are controlled by a controller. The controller controls the cooling system by a determination of an operation of the cooling system for sequencing activations, deactivations, and/or controlling parameters of the pumps, the fans, and/or other component(s) of the cooling system based on a first sensitivity of a power input as a function of lift, and a second sensitivity of a power input as a function of lift.
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公开(公告)号：US10533765B2
公开(公告)日：2020-01-14
申请号：US15749614
申请日：2016-08-04
发明人： Lee R. Cline , John A. Murphy
摘要： A chiller plant including at least two chillers operating at different temperatures are disclosed. Process fluid circuits of the chillers can form fluid communication when, for example, one or more of the at least two chillers may fail, so that the other chiller(s) of the at least two chillers may provide backup operation to the failed chiller(s).
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公开(公告)号：US09995509B2
公开(公告)日：2018-06-12
申请号：US14216419
申请日：2014-03-17
发明人： Lee R. Cline
CPC分类号： F25B7/00 , F24D3/18 , F24D17/02 , F24D2200/12 , F24F2221/54 , F25B6/02 , F25B25/005 , F25B2339/047
摘要： A cascade heat recovery system connects an evaporator from a heating unit to a recovery condenser of the cooling unit, where the recovery condenser is different from a cooling condenser of the cooling unit, and/or connects the evaporator of the heating unit to the cooling loop of the cooling unit, for example in fluid communication with the evaporator of the cooling unit. Both configurations allow the heating unit to be isolated or decoupled from the heat rejection circuit on which the cooling condenser runs. The use of either or both configurations, depending on the operating conditions, can use heat rejected by the evaporator of the cooling unit to be available to the heating unit, so as to provide lift to the heating unit and improve its operating efficiency.
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公开(公告)号：US20160356531A1
公开(公告)日：2016-12-08
申请号：US15243039
申请日：2016-08-22
摘要： A multi-mode, bi-directional cascade heat pump system, according to some examples, includes at least two chillers each being part of a unidirectional refrigerant circuit. The system includes heat exchangers each of which are dedicated to operate as just a condenser or as just an evaporator, regardless of the system's operating mode. In some modes, a secondary fluid transfers heat between the condenser of one chiller and the evaporator of another chiller before the fluid returns to a secondary fluid source such as, for example, a geothermal borefield or a conventional water source. In some embodiments, fluid is withdrawn from a borefield by way of a pump having a speed that varies to maintain a desired fluid temperature and/or a desired heat transfer rate at the borefield. The heat pump system includes means for minimizing flow through the borefield and for minimizing unnecessary mixing of relatively high and low temperature fluid.
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公开(公告)号：US20160356530A1
公开(公告)日：2016-12-08
申请号：US15243095
申请日：2016-08-22
摘要： A multi-mode, bi-directional cascade heat pump system, according to some examples, includes at least two chillers each being part of a unidirectional refrigerant circuit. The system includes heat exchangers each of which are dedicated to operate as just a condenser or as just an evaporator, regardless of the system's operating mode. In some modes, a secondary fluid transfers heat between the condenser of one chiller and the evaporator of another chiller before the fluid returns to a secondary fluid source such as, for example, a geothermal borefield or a conventional water source. In some embodiments, fluid is withdrawn from a borefield by way of a pump having a speed that varies to maintain a desired fluid temperature and/or a desired heat transfer rate at the borefield. The heat pump system includes means for minimizing flow through the borefield and for minimizing unnecessary mixing of relatively high and low temperature fluid.
摘要翻译： 根据一些示例，多模式双向级联热泵系统包括至少两个冷却器，每个都是单向制冷剂回路的一部分。 该系统包括热交换器，每个热交换器专用于仅作为冷凝器或仅作为蒸发器操作，而与系统的操作模式无关。 在一些模式中，在流体返回到次级流体源例如地热钻孔区域或常规水源之前，次流体在一个冷却器的冷凝器和另一个冷却器的蒸发器之间传递热量。 在一些实施例中，流体通过具有变化的速度的泵从钻孔中取出，以保持所需的流体温度和/或在钻孔区域期望的期望的热传递速率。 热泵系统包括用于使通过钻孔区域的流量最小化并且用于最小化相对高温和低温流体的不必要混合的装置。
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公开(公告)号：US20240110732A1
公开(公告)日：2024-04-04
申请号：US17937065
申请日：2022-09-30
CPC分类号： F25B29/003 , F24D3/02 , F24D3/18 , F24F5/0003 , F25B49/022 , F24D2220/0207 , F24D2220/044 , F24D2220/046 , F25B2600/0253
摘要： A packaged heating and/or cooling unit for a production module for a heating, ventilation, air conditioning, and refrigeration (HVACR) system. The packaged unit includes a heat pump configured to provide heating and/or cooling; a connection to a piping distribution system to selectively connect to a hot fluid circuit and/or a cold fluid circuit; and a controller. The controller is configured to connect to and receive a signal from a building automation system for a heating requirement or a cooling requirement, and further configured to selectively control connection to either the hot fluid circuit or the cold fluid circuit and independently control the packaged heating and/or cooling unit based on the signal from the building automation system for either the heating requirement or the cooling requirement.
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20.发明公开公开(公告)号：US20230375242A1
公开(公告)日：2023-11-23
申请号：US18306560
申请日：2023-04-25
发明人： Brian A. Kirkman , Lee R. Cline
IPC分类号： F25B49/02
CPC分类号： F25B49/022 , F25B2400/06 , F25B2500/19 , F25B2600/0251 , F25B2600/2513 , F25B2700/2117 , F25B2500/18 , F25B2600/0253
摘要： Multi-compressor chiller systems can be efficiently operated by determining real time efficiency curves for the compressors currently in operation, along with any compressors that may be added to address demand, and using these efficiency curves to determine changes to compressor operation to improve efficiency in meeting chiller demand. The efficiency curves can be parabolic curves. The data used to determine the efficiency curves can be obtained through operation at a variety of lift points and a variety of load points within those lift points. The efficiency curves can be solved to find intersections where there may be staging points for adding or subtracting compressors from operation to efficiently meet demand. This operation can be automated through a controller of a control system for the multi-compressor chiller system.
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