Patents by Inventor William L. Kopko
William L. Kopko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20190186801Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.Type: ApplicationFiled: August 22, 2017Publication date: June 20, 2019Inventors: William L. Kopko, Stephen M. Zardus, Israel Federman, Curtis C. Crane, Todd Kwao-vovo
-
Patent number: 10317112Abstract: The present disclosure relates to a refrigeration system that includes an evaporator disposed along an evaporator line, a compressor system disposed along a compressor line, a condenser disposed along a condenser line and configured to condense the refrigerant compressed by the compressor system to heat a second fluid stream, and an outdoor coil disposed along a coil line and configured to receive the refrigerant from the condenser or from a discharge line, to selectively transfer heat to or from the refrigerant, and to selectively transfer the refrigerant to the evaporator or to a suction line. The refrigeration system includes two valves and three expansion valves disposed along the different refrigerant flow lines, and a controller configured to determine a simultaneous heating/cooling operating mode of the refrigeration system and to control the valves and expansion valves to operate the refrigeration system in the desired mode.Type: GrantFiled: March 31, 2015Date of Patent: June 11, 2019Assignee: Johnson Controls Technology CompanyInventor: William L. Kopko
-
Patent number: 10215444Abstract: A heat exchanger is provided with stacked coil sections. Each of the stacked coil sections is configured to circulate a fluid independent from the other coil section. An air moving device is used to circulate air through both of the stacked coil sections. The stacked coil sections are positioned to have the air exiting the one coil section entering the other coil section.Type: GrantFiled: January 15, 2018Date of Patent: February 26, 2019Assignee: Johnson Controls Technology CompanyInventors: William L. Kopko, Mustafa Kemal Yanik, Michael Lee Buckley, Glenn Eugene Nickey, Ian Michael Casper
-
Patent number: 10203140Abstract: A refrigeration system is provided, such as for use with chillers. The system uses a tube-side condenser, such as a microchannel condenser, along with a shell-side evaporator such as a falling film evaporator. A flash tank economizer is disposed between the condenser and the evaporator, and an inlet valve to the flash tank is controlled based upon subcooling of condensate from the condenser. The vapor exiting the flash tank may be fed via an economizer line to a system compressor. Liquid phase refrigerant combined with some gas phase refrigerant exits the flash tank and is directed through an orifice before entering the evaporator.Type: GrantFiled: June 28, 2016Date of Patent: February 12, 2019Assignee: Johnson Controls Technology CompanyInventors: William L. Kopko, Israel Federman, Satheesh Kulankara, Andrew John Graybill
-
Publication number: 20180347874Abstract: Embodiments of the present disclosure are directed toward systems and method for cooling a refrigerant flow of a refrigerant circuit with a cold cooling fluid flow from a thermal storage unit to generate a warm cooling fluid flow, thermally isolating the cold cooling fluid flow and the warm cooling fluid flow in the thermal storage unit, and cooling the warm cooling fluid flow from the thermal storage unit in a chiller system to at least partially produce the cold cooling fluid flow.Type: ApplicationFiled: August 13, 2018Publication date: December 6, 2018Inventor: William L. Kopko
-
Patent number: 10047985Abstract: A refrigerant flow through a refrigerant circuit may be cooled with a cold cooling fluid flow from a thermal storage unit to generate a warm cooling fluid flow. The cold cooling fluid flow and the warm cooling fluid flow may be thermally isolated in the thermal storage unit, and a chiller system may cool the warm cooling fluid flow from the thermal storage unit to at least partially produce the cold cooling fluid flow.Type: GrantFiled: November 23, 2015Date of Patent: August 14, 2018Assignee: Johnson Controls Technology CompanyInventor: William L. Kopko
-
Patent number: 10018393Abstract: A method for controlling an economizer circuit is provided. The economizer circuit includes a valve to regulate refrigerant flow between the economizer and the compressor. The valve can be opened to engage the economizer circuit or closed to disengage the economizer circuit based on the output frequency provided to the compressor motor by a variable speed drive and an operating condition of the economizer.Type: GrantFiled: July 24, 2015Date of Patent: July 10, 2018Assignee: Johnson Controls Technology CompanyInventors: William L. Kopko, Andrew John Graybill, Glenn Eugene Nickey, Israel Federman, Satheesh Kulankara
-
Publication number: 20180156492Abstract: A heat exchanger is provided with stacked coil sections. Each of the stacked coil sections is configured to circulate a fluid independent from the other coil section. An air moving device is used to circulate air through both of the stacked coil sections. The stacked coil sections are positioned to have the air exiting the one coil section entering the other coil section.Type: ApplicationFiled: January 15, 2018Publication date: June 7, 2018Inventors: William L. Kopko, Mustafa Kemal Yanik, Michael Lee Buckley, Glenn Eugene Nickey, Ian Michael Casper
-
Publication number: 20180120005Abstract: A refrigeration system includes a chiller with an integrated free cooling system and refrigeration system. In certain embodiments, the chiller may be a single package unit with all equipment housed within the same support frame. The chiller may generally include three modes of operation: a first mode that employs free cooling, a second mode that employs free cooling and implements a refrigeration cycle, and a third mode that uses the free cooling system to remove heat from the refrigeration system. A heat exchanger may be shared between the free cooling system and the refrigeration system to transfer heat from the refrigeration system to the free cooling system.Type: ApplicationFiled: October 27, 2017Publication date: May 3, 2018Inventors: William L. Kopko, Mustafa K. Yanik
-
Patent number: 9885503Abstract: A system for cooling air for use with a liquid cooling fluid loop. The system includes a first refrigerant circuit with an air-cooled condenser, a second refrigerant circuit with a liquid-cooled condenser, and a free-cooling loop. A control device is provided for controlling the operation of the system between a first mode, a second mode, and a third mode. When operating in the first mode, only the free-cooling loop cooperates directly with liquid cooling fluid in the liquid cooling fluid loop to cool the liquid cooling fluid, when operating in the second mode, the second refrigerant circuit is not engaged, and when operating in the third mode, the free-cooling loop interacts with the second refrigerant circuit to reject heat of the second refrigerant circuit through the free-cooling loop.Type: GrantFiled: January 24, 2017Date of Patent: February 6, 2018Assignee: Johnson Controls Technology CompanyInventor: William L. Kopko
-
Patent number: 9874378Abstract: A system for cooling air for use with a liquid cooling fluid loop. The system includes a first refrigerant circuit with an air-cooled condenser, a second refrigerant circuit with a liquid-cooled condenser, and a free-cooling loop. A control device is provided for controlling the operation of the system between a first mode, a second mode, and a third mode. When operating in the first mode, only the free-cooling loop cooperates directly with liquid cooling fluid in the liquid cooling fluid loop to cool the liquid cooling fluid, when operating in the second mode, the second refrigerant circuit is not engaged, and when operating in the third mode, the free-cooling loop interacts with the second refrigerant circuit to reject heat of the second refrigerant circuit through the free-cooling loop.Type: GrantFiled: January 24, 2017Date of Patent: January 23, 2018Assignee: Johnson Controls Technology CompanyInventor: William L. Kopko
-
Patent number: 9869487Abstract: A heat exchanger is provided with stacked coil sections. Each of the stacked coil sections is configured to circulate a fluid independent from the other coil section. An air moving device is used to circulate air through both of the stacked coil sections. The stacked coil sections are positioned to have the air exiting the one coil section entering the other coil section.Type: GrantFiled: February 11, 2011Date of Patent: January 16, 2018Assignee: Johnson Controls Technology CompanyInventors: Glenn Eugene Nickey, Ian Michael Casper, William L. Kopko, Michael Lee Buckley, Mustafa Kemal Yanik
-
Publication number: 20180010838Abstract: Embodiments of the present disclosure are directed toward systems and method for cooling a refrigerant flow of a refrigerant circuit with a cool water flow from a cool water storage to generate a warm water flow and to cool the refrigerant flow by a subcooling temperature difference, flowing the warm water flow to the cool water storage, and thermally isolating the warm water flow from the cool water flow in the cool water storage.Type: ApplicationFiled: August 14, 2017Publication date: January 11, 2018Inventors: William L. Kopko, Andrew M. Welch, Satheesh Kulankara
-
Patent number: 9850902Abstract: A system is provided for adjusting the volume ratio of a screw compressor. The system can use a port in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A valve can be used to open or close the port to obtain different volume ratios in the compressor.Type: GrantFiled: March 26, 2010Date of Patent: December 26, 2017Assignee: Johnson Controls Technology CompanyInventors: Paul Nemit, Jr., Angela Marie Comstock, William L. Kopko
-
Patent number: 9754574Abstract: A method is provided including receiving a first input indicative of a desired design capacity of a refrigeration system, and receiving a second input indicative of a desired maximum acoustical noise of the refrigeration system. The method also includes iteratively selecting a candidate compressor system from a set of compressor systems, and iteratively selecting a candidate condenser system from a set of condenser systems. In addition, the method includes simulating operation of the refrigeration system based on the candidate compressor system and the candidate condenser system until a suitable refrigeration system is established having a computed design capacity greater than or equal to the desired design capacity, and a computed maximum acoustical noise less than or equal to the desired maximum acoustical noise. The method further includes providing an output indicative of the candidate compressor system and the candidate condenser system of the suitable refrigeration system.Type: GrantFiled: November 29, 2012Date of Patent: September 5, 2017Assignee: JOHNSON CONTROLS TECHNOLOGY COMPANYInventors: William L. Kopko, Atul Singh, Satheesh Kulankara, Andrew J. Graybill, Lewis M. Bass
-
Patent number: 9733005Abstract: Embodiments of the present disclosure are directed toward systems and method for cooling a refrigerant flow of a refrigerant circuit with a cool water flow from a cool water storage to generate a warm water flow and to cool the refrigerant flow by a subcooling temperature difference, flowing the warm water flow to the cool water storage, and thermally isolating the warm water flow from the cool water flow in the cool water storage.Type: GrantFiled: March 10, 2014Date of Patent: August 15, 2017Assignee: JOHNSON CONTROLS TECHNOLOGY COMPANYInventors: William L. Kopko, Andrew M. Welch, Satheesh Kulankara
-
Publication number: 20170227263Abstract: A refrigeration system includes a free cooling system having an air-cooled heat exchanger, where the air-cooled heat exchanger includes a fan configured to move air over coils of the air-cooled heat exchanger to remove heat from a coolant flowing through the air-cooled heat exchanger, and a mechanical cooling system with a refrigerant loop that includes an evaporator, a compressor, and a condenser disposed along the refrigerant loop, where the compressor is configured to circulate a refrigerant through the refrigerant loop, and wherein the evaporator is configured to receive the coolant and transfer heat from the coolant to the refrigerant. The refrigeration system also includes a controller configured to adjust a fan speed of the fan up to a threshold fan speed, to initiate operation of the compressor when the fan speed reaches the threshold fan speed, wherein the fan speed and a compressor speed of the compressor are based at least on an ambient air temperature and a cooling load demand.Type: ApplicationFiled: February 8, 2017Publication date: August 10, 2017Inventor: William L. Kopko
-
Patent number: 9657978Abstract: A refrigeration system is provided, such as for use with chillers. The system uses a tube-side condenser, such as a microchannel condenser, along with a shell-side evaporator such as a falling film evaporator. A flash tank economizer is disposed between the condenser and the evaporator, and an inlet valve to the flash tank is controlled based upon subcooling of condensate from the condenser. The vapor exiting the flash tank may be fed via an economizer line to a system compressor. Liquid phase refrigerant combined with some gas phase refrigerant exits the flash tank and is directed through an orifice before entering the evaporator.Type: GrantFiled: July 30, 2010Date of Patent: May 23, 2017Assignee: Johnson Controls Technology CompanyInventors: William L. Kopko, Israel Federman, Satheesh Kulankara, Andrew John Graybill
-
Publication number: 20170131002Abstract: A system for cooling air for use with a liquid cooling fluid loop. The system includes a first refrigerant circuit with an air-cooled condenser, a second refrigerant circuit with a liquid-cooled condenser, and a free-cooling loop. A control device is provided for controlling the operation of the system between a first mode, a second mode, and a third mode. When operating in the first mode, only the free-cooling loop cooperates directly with liquid cooling fluid in the liquid cooling fluid loop to cool the liquid cooling fluid, when operating in the second mode, the second refrigerant circuit is not engaged, and when operating in the third mode, the free-cooling loop interacts with the second refrigerant circuit to reject heat of the second refrigerant circuit through the free-cooling loop.Type: ApplicationFiled: January 24, 2017Publication date: May 11, 2017Inventor: William L. Kopko
-
Publication number: 20170131004Abstract: A system for cooling air for use with a liquid cooling fluid loop. The system includes a first refrigerant circuit with an air-cooled condenser, a second refrigerant circuit with a liquid-cooled condenser, and a free-cooling loop. A control device is provided for controlling the operation of the system between a first mode, a second mode, and a third mode. When operating in the first mode, only the free-cooling loop cooperates directly with liquid cooling fluid in the liquid cooling fluid loop to cool the liquid cooling fluid, when operating in the second mode, the second refrigerant circuit is not engaged, and when operating in the third mode, the free-cooling loop interacts with the second refrigerant circuit to reject heat of the second refrigerant circuit through the free-cooling loop.Type: ApplicationFiled: January 24, 2017Publication date: May 11, 2017Inventor: William L. Kopko