Invention Application
- Patent Title: EVAPORATOR AND CENTRIFUGAL CHILLER PROVIDED WITH THE SAME
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Application No.: US15736130Application Date: 2016-09-06
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Publication No.: US20180187932A1Publication Date: 2018-07-05
- Inventor: Naoya MIYOSHI , Kenji UEDA , Yoshinori SHIRAKATA , Noriyuki MATSUKURA
- Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
- Current Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
- Current Assignee Address: JP Tokyo
- Priority: JP2015-201239 20151009
- International Application: PCT/JP2016/076068 WO 20160906
- Main IPC: F25B39/00
- IPC: F25B39/00 ; F25B1/00 ; F28D1/04 ; F28D7/16 ; F28F9/02 ; F28F9/24

Abstract:
Provided is an evaporator capable of, in a centrifugal chiller using a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG, preventing dry-out of a group of heat transfer pipes in an evaporator to increase heat transfer performance and to suppress reduced efficiency due to carryover of the low pressure refrigerant in a liquid phase to a turbo compressor side and a centrifugal chiller provided with same. An evaporator (7) comprises a pressure container (21) into which a refrigerant is compressed and introduced, a refrigerant inlet (22) provided on a lower portion of the pressure container, a refrigerant outlet (23) provided on an upper portion of the pressure container, a group of heat transfer pipes (25) that exchange heat with the refrigerant through the interior of the pressure container and a tabular refrigerant distribution plate (26) installed between the refrigerant inlet and the group of heat transfer pipes and in which refrigerant flow holes (26a) are drilled. The surface ratio of the refrigerant flow holes per unit area on the refrigerant distribution plate in an area (A1) corresponding to a position near the upstream side of the group of heat transfer pipes is greater than that in another area (A2).
Information query