Back to results
US 7,028,492 B2Granted
Hybrid dehumidication system
AssigneeCarrier Corporation
InventorsMichael F. Taras, Alexander Lifson
Life of this patent
Estimating the term…
Abstract
A hybrid dehumidification system includes a compressor, a condenser, an expansion device and an evaporator connected for flow of working fluid through a fluid circuit; a reheat coil positioned relative to the evaporator for heating at least a portion of a stream of air passing through the evaporator; and a working fluid directing system adapted to flow working fluid in at least two modes of operation selected from the group consisting of a standard cooling mode, a cooling and enhanced dehumidification mode; a dehumidification without substantial sensible capacity mode; a heating and dehumidification mode; and a dehumidification with variable sensible capacity mode.
Claims8
A hybrid dehumidification system, comprising:
- a compressor, a condenser, an expansion device and an evaporator connected for flow of working fluid through a circuit;
- a reheat coil positioned relative to the evaporator for heating at least a portion of a stream of air passing through the evaporator;
- a condenser bypass circuit connected between the working fluid circuit upstream of the condenser and the working fluid circuit downstream of the condenser;
- and
- working fluid directing means for flowing working fluid in at least two modes of operation selected from a group of modes consisting of:
- a cooling mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a cooling and enhanced dehumidification mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a dehumidification without substantial sensible capacity mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a heating and dehumidification mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- and
- a dehumidification with variable sensible capacity mode wherein working fluid flows sequentially from the compressor in a first portion to the condenser and in a second portion through the condenser bypass circuit around the condenser, the first and second portions then flow to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor.
8 more elements
A hybrid dehumidification system, comprising:
- a compressor, a condenser, an expansion device and an evaporator connected for flow of working fluid through a circuit;
- a reheat coil positioned relative to the evaporator for heating at least a portion of a stream of air passing through the evaporator;
- and
- working fluid directing means for flowing working fluid in at least two modes of operation selected from a group of modes consisting of:
- a cooling mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a cooling and enhanced dehumidification mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a dehumidification without substantial sensible capacity mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a heating and dehumidification mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- and
- a dehumidification with variable sensible capacity mode wherein working fluid flows sequentially from the compressor in a first portion to the condenser and in a second portion around the condenser, the first and second portions then flow to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor, wherein the working fluid directing means comprises means for selectively flowing working fluid in all of the modes of operation.
7 more elements
A hybrid dehumidification system, comprising:
- a compressor, a condenser, an expansion device and an evaporator connected for flow of working fluid through a circuit;
- a reheat coil positioned relative to the evaporator for heating at least a portion of a stream of air passing through the evaporator;
- and
- working fluid directing means for flowing working fluid in at least two modes of operation selected from a group of modes consisting of:
- a cooling mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a cooling and enhanced dehumidification mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a dehumidification without substantial sensible capacity mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a heating and dehumidification mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- and
- a dehumidification with variable sensible capacity mode wherein working fluid flows sequentially from the compressor in a first portion to the condenser and in a second portion around the condenser, the first and second portions then flow to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor, wherein the working fluid directing means comprises:
- a reheat coil segment connected between the working fluid circuit upstream of the condenser and the reheat coil, and between the reheat coil and the working fluid circuit downstream of the condenser and upstream of the expansion device;
- a warm liquid reheat segment connected between the working fluid circuit downstream of the condenser and the reheat coil;
- a reheat working fluid recycling segment connected between the reheat coil and the working fluid circuit upstream of the condenser;
- and
- a condenser bypass circuit connected between the working fluid circuit upstream of the condenser and the working fluid circuit downstream of the condenser.
12 more elements
A method for operating a hybrid dehumidification system, comprising the steps of:
- providing a refrigeration system comprising a compressor, a condenser, an expansion device and an evaporator connected for flow of working fluid through a circuit;
- a reheat coil positioned relative to the evaporator for heating at least a portion of a stream of air passing through the evaporator;
- and working fluid directing means for selectively flowing working fluid in each of a group of modes of operation comprising:
- a cooling mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a cooling and enhanced dehumidification mode wherein working fluid flows sequentially from the compressor to the condenser, from the condenser to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a dehumidification without substantial sensible capacity mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the condenser, from the condenser to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- a heating and dehumidification mode wherein working fluid flows sequentially from the compressor to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- and
- a dehumidification with variable sensible capacity mode wherein working fluid flows sequentially from the compressor in a first portion to the condenser and in a second portion around the condenser, the first and second portions then flow to the reheat coil, from the reheat coil to the expansion device, from the expansion device to the evaporator and from the evaporator to the compressor;
- sensing a desired mode of operation from the group of modes;
- and
- operating the working fluid directing means to provide the desired mode of operation.
9 more elements
Dependencies are inferred from the claim text.