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1. (WO2017154934) VAPOR COMPRESSION-TYPE REFRIGERATOR AND METHOD FOR CONTROLLING SAME

Pub. No.:    WO/2017/154934    International Application No.:    PCT/JP2017/009100
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Mar 08 00:59:59 CET 2017
IPC: F25B 43/04
Applicants: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
三菱重工サーマルシステムズ株式会社
Inventors: WAJIMA, Kazuki
和島 一喜
TOGANO, Yoshie
栂野 良枝
MIYOSHI, Naoya
三吉 直也
Title: VAPOR COMPRESSION-TYPE REFRIGERATOR AND METHOD FOR CONTROLLING SAME
Abstract:
The present invention is provided with an extraction device (40) including: a cooling unit for cooling gas that has been extracted from a condenser (5) and condensing condensed gas; and an exhaust pump (48) for discharging, to the exterior, uncondensed gas that has been isolated without having been condensed by the cooling unit. A current temperature difference, which is the difference between the current saturation temperature in the condenser (5) and the current outlet temperature of a cooling water heat transfer tube (5a), and a planned temperature difference, which is a planned value, are computed. Using information on an in-tube fouling temperature difference elevation, which is a difference between the saturation temperature in the condenser (5) and the outlet temperature of the cooling water heat transfer tube (5a) and which is predetermined assuming in-tube fouling of the cooling water heat transfer tube (5a), the temperature difference elevation due to the current in-tube fouling is computed. The extraction device (40) is operated if the elevation of the current temperature difference from the planned temperature difference is greater by a predetermined value or more than the temperature difference elevation due to the current in-tube fouling.