Chiller/heater process fluid temperature coordination
AssigneeTrane International Inc.
InventorsLee L. SIBIK, Bhavana DEPURU GURU, Graham T. MILLER, Daryl KEYS, Ben R. GARBERS, Brian A. KIRKMAN, Juan M. TORRES
Life of this patent
Estimating the term…
Abstract
Runtime of heating, ventilation, air conditioning, and refrigeration (HVACR) is maintained, in part, by creating an operational limit and an improved staging scheme based on the evaporator water temperature in heating mode, or the condenser water temperature in cooling mode. If the water temperature becomes close to the operational limit setpoint the chiller will start unloading running compressors, and eventually shutdown compressors to manage the difference in load, while maintaining operation of the HVACR.
Claims18
A heating and cooling system, comprising:
- a first heat exchanging unit having a first compressor, first evaporator, and first condenser fluidly connected to each other;
- a second heat exchanging unit having a second compressor, a second evaporator, and a second condenser fluidly connected to each other;
- a controller configured to:
- operate the first heat exchanging unit and the second heat exchanging unit in a booster or cascade configuration to reject heat to a heating load via the first heat exchanging unit;
- and
- unload the first compressor when a fluid operation parameter for the first heat exchanging unit is determined to be less than an acceptable range.
A heating and cooling system, comprising:
- a first heat exchanging unit having a first compressor, first evaporator, and first condenser fluidly connected to each other;
- a second heat exchanging unit having a second compressor, a second evaporator, and a second condenser fluidly connected to each other;
- a controller configured to:
- operate the first heat exchanging unit and the second heat exchanging unit in a booster or cascade configuration to extract heat from a cooling load via the second heat exchanging unit;
- and
- unload the second compressor when a fluid operation parameter for the second heat exchanging unit is determined to be higher than an acceptable range.
A heating and cooling system, comprising:
- a first heat exchanging unit operating in a heating mode, wherein the first heat exchanging unit comprises:
- a first compressor, a first condenser, and a first evaporator in fluid communication with each other;
- a second heat exchanging unit operating in a cooling mode, wherein the second heat exchanging unit comprises:
- a second compressor, a second condenser, and a second evaporator in fluid communication with each other;
- and
- an intermediate loop to thermally communicate thermal energy between the first heat exchanging unit and a second heat exchanging unit;
- and
- at least one controller configured to:
- unload the first compressor when a cooling load of the second heat exchanging unit decreases causing a fluid operation parameter for the first heat exchanging unit to be less than an acceptable range.
Dependencies are inferred from the claim text.