Air-conditioning system and method of installing energy recovery apparatus
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-017/02
F25D-017/00
F25B-027/00
출원번호
UP-0900477
(2007-09-11)
등록번호
US-7818973
(2010-11-15)
우선권정보
JP-2003-136161(2003-05-14)
발명자
/ 주소
Tanaka, Yuji
Fujita, Yukihiro
Koyama, Eiji
Satou, Kouich
출원인 / 주소
Hitachi Industrial Equipment Systems Co., Ltd.
대리인 / 주소
Townsend and Townsend and Crew LLP
인용정보
피인용 횟수 :
1인용 특허 :
3
초록▼
There is provided an energy recovery apparatus capable of recovering a hydraulic energy in a regenerative air-conditioning system including a pressure sustaining valve and capable of coping with a discharge change caused by variation in air-conditioning load, the air-conditioning system being capabl
There is provided an energy recovery apparatus capable of recovering a hydraulic energy in a regenerative air-conditioning system including a pressure sustaining valve and capable of coping with a discharge change caused by variation in air-conditioning load, the air-conditioning system being capable of carrying out normal operation even in a case where the energy recovery apparatus fails. The energy recovery apparatus is configured so as to feed water from a water tank to air-conditioning loads such as a heat source or a fan coil at a higher place through a feed pipe line by a pump and to lead the water passed through the air-conditioning loads into the water tank via a return pipe line including the pressure sustaining valve, a branch pipe line is disposed so as to branch into the water tank from the return pipe line in upstream of the pressure sustaining valve, and the energy recovery apparatus is connected in to the branch pipe line.
대표청구항▼
What is claimed is: 1. An energy recovery apparatus installed in an air-conditioning system comprising a water tank, a feed pipe line for feeding water from the water tank to air-conditioning loads, a return pipe line for leading water which has passed through the air-conditioning loads into the wa
What is claimed is: 1. An energy recovery apparatus installed in an air-conditioning system comprising a water tank, a feed pipe line for feeding water from the water tank to air-conditioning loads, a return pipe line for leading water which has passed through the air-conditioning loads into the water tank, and a pressure sustaining valve disposed in the return pipe line, the apparatus characterized by: a branch pipe line connected to the return pipe line, the branch pipe line is configured to branch into the water tank from the return pipe line upstream of the pressure sustaining valve, wherein the pressure sustaining valve is installed into the branch pipe line; and an energy recovery apparatus being connected in the branch pipe line, wherein the pressure sustaining valve is configured to selectively open and close depending on pressure in the return pipe line. 2. An energy recovery apparatus according to claim 1, wherein the energy recovery apparatus comprises: an operation control device for such a manner that an inlet pressure falls within a predetermined rate range with respect to an inlet pressure during operation at a rated discharge, when a discharge passing through the energy-recovery apparatus changes. 3. An energy recovery apparatus according to claim 1 or 2, wherein a bore diameter of a pipeline downstream of the energy recovery apparatus is smaller than the upstream thereof. 4. An energy recovery apparatus according to claim 3, when the energy recovery apparatus comprises: a water wheel including a centrifugal impeller; a brushless permanent magnet synchronous generator; and a generator controller for controlling the generator. 5. An energy recovery apparatus according to claim 4, wherein a control valve is disposed in the return piping on the downstream side of the energy recovery apparatus. 6. An energy recovery apparatus according to claim 5, wherein the water wheel comprises pressure sensors for measuring inlet and outlet pressures upstream and downstream thereof so as to transmit output signals to the generator controller, the generator controller being capable of controlling a revolving speed of the generator incorporated to the water wheel based on the output signals, and delivering a control signal to the generator, and power measuring device for measuring an output power of the generator to deliver a measurement result to a control valve controller, the control valve controller being capable of specifying a valve opening degree of the control valve based on the measurement result so as to deliver a valve opening signal to the control valve. 7. An energy recovery apparatus according to claim 6, wherein the revolving speed of the generator incorporated to the water wheel is increased in response to a decrease in the discharge, and the increasing of the revolving speed of the generator incorporated to the water wheel is caused so as to reduce the valve opening degree of the control valve by the control valve controller in association with the generator controller, when an output power of a water wheel of an effective head drop thereof is smaller than a set value recorded in the generator controller. 8. An energy recovery apparatus in an air-conditioning system comprising: a water tank; a feed pipe line for feeding water to air-conditioning loads via a pump; a return pipe line for leading the water which has passed through the air-conditioning loads into the water tank; and a pressure sustaining valve disposed in the return pipe line, the apparatus comprising: a branch pipe line connected to the return pipe line upstream of the pressure sustaining valves, wherein the branch pipe is configured to branch into the water tank; and wherein the energy recovery apparatus is connected in the branch pipe line. 9. An energy recovery apparatus according to claim 8, wherein the bore diameter of a pipe line downstream of the energy recovery apparatus is smaller than that upstream thereof. 10. An energy recovery apparatus according to claim 8 or 9, wherein the return piping has a control valve and the control valve is closed in case that the air-conditioning system is stopped. 11. An energy recovery apparatus according to claim 10, wherein the energy recovery apparatus comprises: a water wheel including a centrifugal impeller; a brushless permanent magnet synchronous generator; and a generator controller for controlling the generator. 12. An energy recovery apparatus according to claim 11, wherein the water wheel comprises pressure sensors for measuring inlet and outlet pressures upstream and downstream thereof so as to transmit output signals to the generator controller, the generator controller being capable of controlling a revolving speed of the generator incorporated to the water wheel based on the output signals, and delivering a control signal to the generator, and a power measuring device for measuring an output power of the generator to deliver a measurement result to a control valve controller, the control valve controller being capable of specifying a valve opening degree of the control valve based on the measurement result so as to deliver a valve opening signal to the control valve. 13. An energy recovery apparatus according to claim 12, wherein the revolving speed of the generator incorporated to the water wheel is increased in response to a decrease in the discharge, and the increasing of the revolving speed of the generator incorporated to the water wheel is caused so as to reduce the valve opening degree of the control valve by the control valve controller in association with the generator controller, when an output power of a water wheel or an effective head drop thereof is smaller than a set value recorded in the generator controller.
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이 특허에 인용된 특허 (3)
Satoh, Kouichi; Yanagisawa, Seiji; Watabe, Shu; Fujita, Yukihiro; Shima, Akio; Tanaka, Yuji; Takahashi, Shinichi; Kunii, Hiroshi, Energy collecting system and method of operating the same.
Noe James C. (23650 Community St. West Hills CA 91304) McKeirnan ; Jr. Robert D. (8300 Manitoba St. #210 Playa del Rey CA 90293), Gas turbine generator set.
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