CA2615781A1 - Closed-loop dehumidification circuit for refrigerant system - Google Patents
Closed-loop dehumidification circuit for refrigerant system Download PDFInfo
- Publication number
- CA2615781A1 CA2615781A1 CA002615781A CA2615781A CA2615781A1 CA 2615781 A1 CA2615781 A1 CA 2615781A1 CA 002615781 A CA002615781 A CA 002615781A CA 2615781 A CA2615781 A CA 2615781A CA 2615781 A1 CA2615781 A1 CA 2615781A1
- Authority
- CA
- Canada
- Prior art keywords
- refrigerant
- circuit
- set forth
- reheat
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
Abstract
A closed-loop reheat circuit decoupled from a main refrigerant circuit is provided as part of a refrigerant system. In the closed-loop reheat circuit refrigerant is flown through an auxiliary heat exchanger, at which it transfers heat to refrigerant in the main circuit, increasing its cooling and dehumidification potential prior to entering an evaporator. The closed-loop circuit also includes a reheat heat exchanger that is placed in the path of at least a portion of airflow having passed over an evaporator. The reheat heat exchanger reheats air supplied to a conditioned space to a desired temperature after sufficient amount of moisture has been removed from the air in the evaporator to provide a comfortable humidity level. By utilizing the closed-loop reheat circuit, a control for the overall refrigerant system becomes less complex and more flexible, and the refrigerant system operation turns out to be more reliable and satisfying a variety of environmental conditions and potential applications. Various features and options of the decoupled reheat circuit concept are also disclosed.
Claims (24)
1. A refrigerant system comprising:
a main refrigerant circuit including a compressor, a condenser, an auxiliary heat exchanger, an expansion device, and an evaporator;
a closed-loop reheat circuit, said closed-loop reheat circuit passing a refrigerant through said auxiliary heat exchanger and a reheat heat exchanger;
an air-moving device moving air over said evaporator; and said reheat heat exchanger being positioned such that at least a portion of air having passed over said evaporator then passes over said reheat heat exchanger.
a main refrigerant circuit including a compressor, a condenser, an auxiliary heat exchanger, an expansion device, and an evaporator;
a closed-loop reheat circuit, said closed-loop reheat circuit passing a refrigerant through said auxiliary heat exchanger and a reheat heat exchanger;
an air-moving device moving air over said evaporator; and said reheat heat exchanger being positioned such that at least a portion of air having passed over said evaporator then passes over said reheat heat exchanger.
2. The refrigerant system as set forth in claim 1, wherein said auxiliary heat exchanger is positioned downstream of the condenser.
3. The refrigerant system as set forth in claim 1, wherein said auxiliary heat exchanger is positioned upstream of the condenser.
4. The refrigerant system as set forth in claim 1, wherein a liquid pump is included in said closed-loop circuit to drive refrigerant.
5. The refrigerant system as set forth in claim 4, wherein a variable speed drive is provided for said liquid pump.
6. The refrigerant system as set forth in claim 4, wherein an expansion device is included in said closed-loop circuit.
7. The refrigerant system as set forth in claim 1, wherein a flow control device is included in said closed-loop reheat circuit.
8. The refrigerant system as set forth in claim 1, wherein a bypass line allows selective bypass of at least a portion of refrigerant in said main refrigerant circuit around said condenser.
9. The refrigerant system as set forth in claim 1, wherein refrigerant in said main circuit and refrigerant in said reheat circuit are different.
10. The refrigerant system as set forth in claim 1, wherein refrigerant in said main circuit and refrigerant in said reheat circuit have identical constituents.
11. The refrigerant system as set forth in claim 1, wherein refrigerant in said reheat circuit remains in a liquid state throughout the circuit.
12. The refrigerant system as set forth in claim 1, wherein refrigerant in said reheat circuit undergoes phase transformation between liquid and vapor phases.
13. A method of refrigerant system comprising:
compressing a refrigerant at a compressor and delivering the refrigerant to a downstream condenser through a main flow line;
providing an auxiliary heat exchanger, and an evaporator downstream of said auxiliary heat exchanger;
compressed refrigerant in said main flow line passing to said condenser, to said auxiliary heat exchanger, to said evaporator, and back to said compressor;
providing a closed-loop reheat circuit, said closed-loop reheat circuit passing a refrigerant through said auxiliary heat exchanger, and then to a reheat heat exchanger;
an air-moving device moving air over said evaporator; and said reheat heat exchanger being positioned such that at least a portion of air having passed over said evaporator then passes over said reheat heat exchanger.
compressing a refrigerant at a compressor and delivering the refrigerant to a downstream condenser through a main flow line;
providing an auxiliary heat exchanger, and an evaporator downstream of said auxiliary heat exchanger;
compressed refrigerant in said main flow line passing to said condenser, to said auxiliary heat exchanger, to said evaporator, and back to said compressor;
providing a closed-loop reheat circuit, said closed-loop reheat circuit passing a refrigerant through said auxiliary heat exchanger, and then to a reheat heat exchanger;
an air-moving device moving air over said evaporator; and said reheat heat exchanger being positioned such that at least a portion of air having passed over said evaporator then passes over said reheat heat exchanger.
14. The method as set forth in claim 13, wherein a liquid pump drives refrigerant through said closed-loop circuit.
15. The method as set forth in claim 14, wherein a variable speed drive varies the speed of said liquid pump.
16. The method as set forth in claim 13, wherein a flow control device is included in said closed-loop reheat circuit.
17. The method as set forth in claim 13, wherein a bypass line selectively bypasses refrigerant from said main refrigerant line around said condenser.
18. The method as set forth in claim 13, wherein said auxiliary heat exchanger is positioned downstream of the condenser.
19. The method as set forth in claim 13, wherein said auxiliary heat exchanger is positioned upstream of the condenser.
20. The method as set forth in claim 15, wherein an expansion device is included in said closed-loop reheat circuit.
21. The method as set forth in claim 13, wherein refrigerant in said main circuit and refrigerant in said closed-loop reheat circuit are different.
22. The method as set forth in claim 13, wherein refrigerant in said main circuit and refrigerant in said closed-loop reheat circuit have identical constituents.
23. The method as set forth in claim 13, wherein refrigerant in said closed-loop reheat circuit remains in a liquid state throughout the circuit.
24. The method as set forth in claim 13, wherein refrigerant in said closed-loop reheat circuit undergoes phase transformation between liquid and vapor phases.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2005/027090 WO2007018524A2 (en) | 2005-07-28 | 2005-07-28 | Closed-loop dehumidification circuit for refrigerant system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2615781A1 true CA2615781A1 (en) | 2007-02-15 |
| CA2615781C CA2615781C (en) | 2012-01-24 |
Family
ID=37727745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2615781A Expired - Fee Related CA2615781C (en) | 2005-07-28 | 2005-07-28 | Closed-loop dehumidification circuit for refrigerant system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080202155A1 (en) |
| EP (1) | EP1915580A4 (en) |
| CN (1) | CN101443608B (en) |
| CA (1) | CA2615781C (en) |
| HK (1) | HK1133069A1 (en) |
| WO (1) | WO2007018524A2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1960719A4 (en) * | 2005-12-07 | 2008-11-26 | Carrier Corp | Multi-circuit refrigerant system using distinct refrigerants |
| WO2009151830A1 (en) * | 2008-06-13 | 2009-12-17 | Carrier Corporation | Start-up procedure for refrigerant systems having microchannel condenser and reheat cycle |
| WO2013169774A2 (en) | 2012-05-07 | 2013-11-14 | Phononic Devices, Inc. | Thermoelectric heat exchanger component including protective heat spreading lid and optimal thermal interface resistance |
| US20130291555A1 (en) | 2012-05-07 | 2013-11-07 | Phononic Devices, Inc. | Thermoelectric refrigeration system control scheme for high efficiency performance |
| US9593871B2 (en) | 2014-07-21 | 2017-03-14 | Phononic Devices, Inc. | Systems and methods for operating a thermoelectric module to increase efficiency |
| US10458683B2 (en) | 2014-07-21 | 2019-10-29 | Phononic, Inc. | Systems and methods for mitigating heat rejection limitations of a thermoelectric module |
| US10088178B2 (en) | 2015-05-05 | 2018-10-02 | MJC, Inc. | Multi-zone variable refrigerant flow heating/cooling unit |
| GB201620907D0 (en) * | 2016-12-08 | 2017-01-25 | G A H (Refrigeration) Ltd | Multi-function heat exchanger |
| CN107101286B (en) * | 2017-06-01 | 2022-09-30 | 广东申菱环境系统股份有限公司 | Evaporative cooling and dehumidifying air conditioning unit and control method thereof |
| US11221165B2 (en) * | 2019-09-17 | 2022-01-11 | Laird Thermal Systems, Inc. | Temperature regulating refrigeration systems for varying loads |
| CN112046253B (en) * | 2020-07-20 | 2022-04-22 | 浙江吉智新能源汽车科技有限公司 | Dehumidification device, thermal management system and dehumidification method for vehicle |
| US11913672B2 (en) * | 2020-12-21 | 2024-02-27 | Goodman Global Group, Inc. | Heating, ventilation, and air-conditioning system with dehumidification |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5228302A (en) * | 1991-11-12 | 1993-07-20 | Eiermann Kenneth L | Method and apparatus for latent heat extraction |
| US6338254B1 (en) * | 1999-12-01 | 2002-01-15 | Altech Controls Corporation | Refrigeration sub-cooler and air conditioning dehumidifier |
| JP3253021B1 (en) * | 2001-03-02 | 2002-02-04 | 株式会社荏原製作所 | Heat pump and dehumidifying air conditioner |
| ATE521860T1 (en) * | 2002-03-28 | 2011-09-15 | Panasonic Corp | COOLING CIRCUIT DEVICE |
| US6701723B1 (en) * | 2002-09-26 | 2004-03-09 | Carrier Corporation | Humidity control and efficiency enhancement in vapor compression system |
| JP4232463B2 (en) * | 2003-01-09 | 2009-03-04 | 株式会社デンソー | Air conditioner |
| JP3901103B2 (en) * | 2003-01-27 | 2007-04-04 | 三菱電機株式会社 | Air conditioner |
-
2005
- 2005-07-28 CN CN2005800512210A patent/CN101443608B/en not_active Expired - Fee Related
- 2005-07-28 WO PCT/US2005/027090 patent/WO2007018524A2/en active Application Filing
- 2005-07-28 EP EP05777509A patent/EP1915580A4/en not_active Withdrawn
- 2005-07-28 US US11/995,142 patent/US20080202155A1/en not_active Abandoned
- 2005-07-28 CA CA2615781A patent/CA2615781C/en not_active Expired - Fee Related
-
2009
- 2009-11-18 HK HK09110786.8A patent/HK1133069A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN101443608B (en) | 2011-04-13 |
| EP1915580A2 (en) | 2008-04-30 |
| US20080202155A1 (en) | 2008-08-28 |
| WO2007018524A8 (en) | 2008-03-27 |
| CA2615781C (en) | 2012-01-24 |
| WO2007018524A2 (en) | 2007-02-15 |
| EP1915580A4 (en) | 2010-12-22 |
| WO2007018524A3 (en) | 2009-04-09 |
| CN101443608A (en) | 2009-05-27 |
| HK1133069A1 (en) | 2010-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130730 |