Trane International Inc.

John Arthur Murphy

Ronnie R Moffitt

Aaron E Opatz

James Kenneth McKeever

Lee R Cline

Susanna Staubly Hanson

Anthony Wayne Bruno

Brian J Fiegen

Eugene R Shedivy

Kevin P Bradley

Kevin Bradley

Methods for providing heating or cooling to a plurality of zones in a conditioned space, include adjusting a temperature of a primary airflow using a heating, ventilation, air conditioning, and refrigeration (HVACR) system including a heat pump circuit and distributing the primary airflow to a plurality of terminals in the zones. The methods further include directing heat from the heat pump circuit to at least one of the plurality of terminals and heating air at the at least one of the plurality of terminals using the heat directed from the heat pump circuit. The methods can further include utilizing sources and sinks of the heat pump circuit to efficiently provide the heating or cooling. Systems include the heat pump circuit, terminals, heat distribution, and can include a controller to operate those components.

HVACR system with zone heating

A method of controlling a discharge air reset in an heating, ventilation, air conditioning, and refrigeration (HVACR system includes determining, by a controller, a space temperature in a conditioned space, a setpoint temperature of the conditioned space, and an operating mode of a variable-air-volume (VAV) box for the conditioned space. The controller determines whether the operating mode of the VAV box matches an operating mode of an HVACR unit. A deviation from the setpoint temperature of the conditioned space for the VAV box for the conditioned is calculated in response to determining the VAV box is in a same mode as the HVACR unit. An average deviation from the setpoint temperature of the conditioned space is calculated. A discharge air setpoint temperature is determined based on the average deviation from the setpoint temperature of the conditioned space. The controller sets the discharge air setpoint temperature of the HVACR unit using the determined discharge air setpoint temperature.

Discharge air reset for a constant volume air changeover bypass

A method of controlling a discharge air reset in an heating, ventilation, air conditioning, and refrigeration (HVACR system includes determining, by a controller, a space temperature in a conditioned space, a setpoint temperature of the conditioned space, and an operating mode of a variable-air-volume (VAV) box for the conditioned space. The controller determines whether the operating mode of the VAV box matches an operating mode of an HVACR unit. A deviation from the setpoint temperature of the conditioned space for the VAV box for the conditioned is calculated in response to determining the VAV box is in a same mode as the HVACR unit. A statistical deviation from the setpoint temperature of the conditioned space is calculated. A discharge air setpoint temperature is determined based on the statistical deviation from the setpoint temperature of the conditioned space. The controller sets the discharge air setpoint temperature of the HVACR unit using the determined discharge air setpoint temperature.

A chiller plant is disclosed. The chiller plant includes a chiller circuit including a chiller, a first process fluid circuit, and a first heat exchanger. The chiller is configured to provide a first process fluid at a first temperature. The chiller plant also includes an air handling circuit including a plurality of ice storage tanks and an air handling unit. The chiller plant further includes a terminal cooling circuit including a plurality of terminals, the terminal cooling circuit providing a second process fluid to the plurality of terminals at a second temperature that is different from the first temperature. The terminal cooling circuit is fluidly separate from, but thermally communicates with, the chiller circuit via the first heat exchanger.

Chiller plant with ice storage

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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Onalaska, WI, United States of America

John Arthur Murphy