Title:
FEEDWATER HEATING SYSTEM
Document Type and Number:
Japanese Patent JP2021134933
Kind Code:
A
Abstract:
To further improve efficiency in a feedwater heating system using both of a heat pump circuit and a heat exchanger for heat recovery.SOLUTION: A feedwater heating system 1 includes: a vapor compression-type heat pump circuit 10 in which a compressor 11, a condenser 12, an expansion valve 13 and an evaporator 14 are annularly connected by a refrigerant circulation line L9, and which takes out hot heat by the condenser 12 by driving the compressor 11; a heat recovery heat exchanger 40; a heat source fluid line L5 for circulating the heat source fluid successively to the heat recovery heat exchanger 40 and the evaporator 14; a water supply line L1 for circulating feedwater W1 successively to the heat recovery heat exchanger 40 and the condenser 12; refrigerant flow rate adjustment means controlled on the basis of a superheating degree of a gas refrigerant R flowing into the compressor 11, and adjusting a flow rate of the refrigerant; feedwater flow rate adjustment means controlled on the basis of a hot water tapping temperature of the feedwater W1 flowing out from the condenser 12 and adjusting a feedwater flow rate; and control means for controlling the refrigerant flow rate adjustment means and the feedwater flow rate adjustment means.SELECTED DRAWING: Figure 1
Inventors:
ISA KAZUMA
OSHITA SATORU
OTANI KAZUYUKI
OSAWA TOMOYA
KANAMARU MASAYOSHI
OSHITA SATORU
OTANI KAZUYUKI
OSAWA TOMOYA
KANAMARU MASAYOSHI
Application Number:
JP2020028564A
Publication Date:
September 13, 2021
Filing Date:
February 21, 2020
Export Citation:
Assignee:
MIURA KOGYO KK
International Classes:
F24H4/02; F25B30/02
Attorney, Agent or Firm:
Iwaike Mitsuru
Ryota Kato
Ryota Kato