| 摘要 |
PROBLEM TO BE SOLVED: To enable a thermal transferring medium to be prevented from being gasified at a pump suction port without increasing cost by a method wherein an increasing rate of condensing capability at a condenser is controlled in response to a liquid surface height, volume and pressure loss of thermal transferring medium present at a pipe between a condenser and a suction port of a pump. SOLUTION: An evaporator 1, a condenser 2, a tank 3 and a pump 4 are connected in sequence by a pipe 5, and refrigerant acting as thermal transferring medium is enclosed in the pipe 5. A freezer 6 is arranged for use in supplying cold heat to the condenser 2, a cold water circulating pipe 7 is arranged between the freezer 6 and the condenser 2 and then the pipe 7 is provided with a pump 8 for controlling a circulation of the cold water and its amount, and with an opening or closing valve 9. Then, the pump 8, the opening or closing valve 9, a liquid surface height sensor 11, a circulating amount measuring device 12 and a memory 21 are connected to a control part 20. The control part 20 calculates differences ΔH, ΔM, and ΔP between a liquid surface height H, a volume M and a pressure loss P and their reference values Hs, Ms and Ps are to multiply a weighted coefficient and then an amount of feeding water of the pump 8 is controlled in response to a sum of differences ΔH, ΔM, and ΔP. |
