Carrier Corporation

United Technologies Corporation

Delphi Technologies, Inc.

Carrier Commercial Refrigeration, Inc.

Parmesh Verma

Wei Zhang

Frederick James Cogswell

Thomas D Radcliff

Yinshan Feng

Jinliang Wang

Subramanyaravi Annapragada

Joseph V Mantese

Wei Xie

Scott Alan Eastman

Rajiv Ranjan

Richard G Lord

Robert A Chopko

Alexander Lifson

Larry D Burns

Michael A Stark

Paul Papas

Bart Antonie Van Hassel

Craig R Walker

Michael F Taras

Zissis A Dardas

Haralambos Cordatos

Sergei F Burlatsky

Andrzej Ernest Kuczek

Charles E Lents

Vladimir Blasko

Hans-Joachim Huff

Wayde R Schmidt

Vishnu Mohan Sishtla

Michael L Perry

Ying She

Georgios S Zafiris

Abbas A Alahyari

Jonathan Rheaume

Ram Ranjan

Sameh Dardona

Catherine Thibaud

Joseph J Sangiovanni

Ulf J Jonsson

Yu Chen

Suman Dwari

Michel Karol Grabon

Sheng Li

Jeffrey John Burchill

Henry E Beamer

Hayden M Reeve

Matthew E Lynch

Slade R Culp

Hongsheng Liu

Ahmad M Mahmoud

Mikhail B Gorbounov

Zuojun Shi

Igor B Vaisman

Jiang Zou

Abdelrahman I Elsherbini

Jules Ricardo Munoz

Young Kyu Park

Aritra Sur

Allen C Kirkwood

Futao Zhao

Gary D Winch

Yirong Jiang

William A Rioux

Abdelrahman ElSherbini

Mark A Daniels

William T Cousins

Randolph Carlton Mcgee

Ivan Rydkin

Dong Luo

Biswajit Mitra

Neal R Herring

Ciara N Poolman

Alexander Chen

Louis Chiappetta, Jr

Giorgio Rusignuolo

Xiaoyuan Chang

Jeffrey James Nieter

Treese Hugener-Campbell

David E Samuelson

Mohsen Farzad

Vadim V Atrazhev

David W Gerlach

Miad Yazdani

Steven A Lozyniak

Robert Michael Runk

Dhruv Chanakya Hoysall

Andrew Smeltz

Kenneth E Cresswell

Mary Teresa Lombardo

Joseph B Wysocki

Sherif Kandil

J Michael Griffin

Vadim I Sultanov

Renee A Eddy

Jialong Wang

Jeremy Wallet-Laïly

David E Parekh

Jiaoquan Xu

William F Walter

Qianli Fu

A system in a transport refrigeration unit (TRU) for driving a compressor and/or fan(s) of the TRU by a variable frequency drive (VFD) that is operable using AC power comprises the VFD operatively connected between the compressor and one or more ac power source such as an engine-generator assembly of the TRU and/or an electrical grid. The same VFD or a different VFD is also operatively connected between the AC power source and fan(s) associated with an evaporator, and a condenser of the TRU. The VFD is configured to be operated by the AC power sources. The VFD is operable to receive a 3-phase AC power ranging from 200 to 650 volts and 0.25 to 25 KW from at least one of the AC power source, convert the received 3-phase AC power to supply AC or DC power to a motor associated with the compressor and/or the fan(s).

System and method for operating variable frequency drive using AC-power source in transport refrigeration unit

A refrigerated transport system comprises: an engine. A vapor compression system comprises: a compressor for compressing a flow of a refrigerant; a first heat exchanger along a refrigerant flowpath of the refrigerant; and a second heat exchanger along the refrigerant flowpath of the refrigerant. A heat recovery system has: a first heat exchanger for transferring heat from the engine to a heat recovery fluid along a heat recovery flowpath; and a second heat exchanger along the heat recovery flowpath. The heat recovery system second heat exchanger and the vapor compression system first heat exchanger are respective portions of a shared tube/fin package.

Ejector-enhanced heat recovery refrigeration system

A system has: a compressor having a suction port and a discharge port; an ejector having a motive flow inlet, a suction flow inlet, and an outlet; a separator having an inlet, a vapor outlet, and a liquid outlet; a first heat exchanger; an expansion device; and a second heat exchanger. Conduits and valves are positioned to provide alternative operation in: a cooling mode and a heating mode. In the cooling mode, a needle of the ejector is closed. In the heating mode refrigerant passes sequentially from a first section of the second heat exchanger to a second section. In the cooling mode refrigerant passes in parallel through the first section and the second section.

Heat pump with ejector

A method for operating a heat pump () includes operating in a cooling mode wherein heat is absorbed by refrigerant in the indoor heat exchanger () and rejected by refrigerant in the outdoor heat exchanger (). The heat pump switches to operation in a heating mode wherein heat is rejected by refrigerant in the indoor heat exchanger, heat is absorbed by refrigerant in the outdoor heat exchanger, and there is an ejector () motive flow and ejector secondary flow. In the heating mode a refrigerant pressure (P) or temperature (T) is measured and, responsive to the measured refrigerant pressure or temperature, at least one of a fan speed is changed and a needle () of the ejector is actuated.

Ejector heat pump operation

A heat transfer system includes first () and second () electrocaloric module with aligned first and second sides. First and second prime movers () are arranged to direct a working fluid in opposite directions along flow paths through the electrocaloric modules. A rotary fluid control device () including a plurality of openings () is disposed around the electrocaloric modules, and is configured to rotate between positions relative to the modules. In a first position, the first module is in operative fluid communication through the openings with the first prime mover, and the second module is in operative fluid communication through the openings with the second prime mover. In a second position, the first module is in operative fluid communication through the openings with the second prime mover, and the second module is in operative fluid communication through the openings with the first prime mover.

Electrocaloric heat transfer articles and systems

A method of making an electrocaloric element includes dissolving or dispersing an electrocaloric polymer in an organic solvent having a boiling point of less than 100° C. at 1 atmosphere to form a liquid composition comprising the electrocaloric polymer. A film of the liquid composition is cast on a substrate, and the organic solvent is evaporated to form a film of the electrocaloric polymer. The film is removed from the substrate and disposed between electrical conductors to form an electrocaloric element.

Solvent cast electrocaloric polymer films

A refrigeration system includes a vapor compression loop and a purge system in communication with the vapor compression loop. The purge system includes at least one separator including a sorbent material to separate contaminants from a refrigerant purge gas provided from the vapor compression loop when the sorbent material is pressurized.

Enhanced refrigeration purge system

A method of purging contaminants from a refrigerant of a heat pump via a purge system includes generating a driving force across a separator, providing refrigerant including contaminants to the separator, separating the contaminants from the refrigerant within the separator, monitoring one or more parameters of the purge system and the heat pump, and actively controlling an operational parameter of the purge system in response to monitoring one or more parameters of the purge system and the heat pump.

A heat pump includes a vapor compression system and a cooling unit thermally coupled to the vapor compression system. A purge system is arranged in fluid communication with the vapor compression system. The purge system includes at least one separator operable to separate contaminants from a refrigerant purge gas provided to the purge system from the vapor compression system.

A vapor compression system () has: first (A;A;A) and second (B;B;B) compressors; first () and second () heat exchangers; and one or more expansion devices (A,B). Means (A,B;A,B,A,B;A,B,A,B) are provided for switching the system between operation in first and second modes using the respective first and second compressors. In the first mode: the first compressor compresses refrigerant; the compressed refrigerant is cooled in the first heat exchanger; the cooled refrigerant is expanded in at least one of the one or more expansion devices; and the expanded refrigerant absorbs heat in the second heat exchanger. In the second mode: the second compressor compresses refrigerant; the compressed refrigerant is cooled in the second heat exchanger; the cooled refrigerant is expanded in at least one of the one or more expansion devices; and the expanded refrigerant absorbs heat in the first heat exchanger.

Dual compressor heat pump

A method for operating a heat pump () includes operating in a cooling mode wherein heat is absorbed by refrigerant in the indoor heat exchanger () and rejected by refrigerant in the outdoor heat exchanger (). The heat pump switches to operation in a heating mode wherein heat is rejected by refrigerant in the indoor heat exchanger, heat is absorbed by refrigerant in the outdoor heat exchanger, and there is an ejector () motive flow and ejector secondary flow. In the heating mode a refrigerant pressure (PH) or temperature (TL) is measured and, responsive to the measured refrigerant pressure or temperature, at least one of a fan speed is changed and a needle () of the ejector is actuated.

A separator for removing contamination from a fluid of a heat pump includes a housing having a hollow interior, a separation component mounted within the hollow interior, and at least one turbulence-generating element positioned within the hollow interior adjacent the separation component.

Membrane purge system

A separator for removing contamination from a fluid of a heat pump includes a housing having a hollow interior, a header plate arranged within the hollow interior and having at least one mounting hole, and a separation module mounted within the hollow interior. The separation module includes a connector for forming an interface with the at least one mounting hole. A sealant is located at the interface between the connector and the mounting hole.

Separator

A method of realizing a ferroic response is provided. The method includes applying a positive or negative conjugate field, which is of a first polarity, to a ferroic material to obtain a substantially minimized entropy of the ferroic material () and applying a slightly negative or a slightly positive conjugate field, which is of a second polarity opposite the first polarity, to the ferroic material to obtain a substantially maximized entropy of the ferroic material ().

Ferroic response through application of conjugate field

A system () has: a compressor () having a suction port () and a discharge port (); an ejector () having a motive flow inlet (), a suction flow inlet (), and an outlet (); a separator () having an inlet (), a vapor outlet (), and a liquid outlet (); a first heat exchanger (); an expansion device (); and a second heat exchanger (). Conduits and valves are positioned to provide alternative operation in: a cooling mode; a first heating mode; and a second heating mode. In the cooling mode and second heating mode, a needle () of the ejector is closed.

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South Windsor, CT, United States of America

Parmesh Verma