Cooling device, control method, and storage medium

A control method for a cooling device including:

• a first evaporation unit and a second evaporation unit each of which receiving heat of a heat-generating body, evaporating an internally stored liquid-phase coolant by heat of the heat-generating body, and causing a gas-phase coolant to flow out;
• a first condensation unit being connected to the first evaporation unit, condensing a gas-phase coolant flowing out from the first evaporation unit, and causing a liquid-phase coolant to flow out;
• a second condensation unit being connected to the second evaporation unit, condensing a gas-phase coolant flowing out from the second evaporation unit, and causing a liquid-phase coolant to flow out;
• a common pipe being provided between the first evaporation unit and the first condensation unit and also between the second evaporation unit and the second condensation unit and causing a liquid-phase coolant flowing out from the first condensation unit and a liquid-phase coolant flowing out from the second condensation unit to join;
• a compressor being connected to the second evaporation unit and the second condensation unit and compressing a gas-phase coolant flowing out from the second evaporation unit;
• an expansion valve being connected to the second condensation unit and the common pipe and expanding a liquid-phase coolant flowing out from the second condensation unit;
• a first valve being connected to the first evaporation unit and the common pipe and adjusting an amount of liquid-phase coolant flowing into the first evaporation unit;
• and
• a second valve being connected to the second evaporation unit and the common pipe and adjusting an amount of liquid-phase coolant flowing into the second evaporation unit, the control method comprising control processing of
• configuring:
• a free-cooling refrigeration cycle circulating a liquid-phase or gas-phase coolant among the first evaporation unit, the first condensation unit, and the common pipe;
• and
• a compression refrigeration cycle circulating a liquid-phase or gas-phase coolant among the second evaporation unit, the second condensation unit, the compressor, the expansion valve, and the common pipe, and
• controlling either one or both of the compressor and the expansion valve, based on a differential heat value being a heat value acquired by subtracting a heat recovery amount by the free-cooling refrigeration cycle from a heat value of the heat-generating body, wherein
• pressure inside the common pipe is greater than pressure inside the first evaporation unit and pressure inside the second evaporation unit.

A non-transitory computer readable medium storing a control program for a cooling device including:

• a first evaporation unit and a second evaporation unit each of which receiving heat of a heat-generating body, evaporating an internally stored liquid-phase coolant by heat of the heat-generating body, and causing a gas-phase coolant to flow out;
• a first condensation unit being connected to the first evaporation unit, condensing a gas-phase coolant flowing out from the first evaporation unit, and causing a liquid-phase coolant to flow out;
• a second condensation unit being connected to the second evaporation unit, condensing a gas-phase coolant flowing out from the second evaporation unit, and causing a liquid-phase coolant to flow out;
• a common pipe being provided between the first evaporation unit and the first condensation unit and also between the second evaporation unit and the second condensation unit and causing a liquid-phase coolant flowing out from the first condensation unit and a liquid-phase coolant flowing out from the second condensation unit to join;
• a compressor being connected to the second evaporation unit and the second condensation unit and compressing a gas-phase coolant flowing out from the second evaporation unit;
• an expansion valve being connected to the second condensation unit and the common pipe and expanding a liquid-phase coolant flowing out from the second condensation unit;
• a first valve being connected to the first evaporation unit and the common pipe and adjusting an amount of liquid-phase coolant flowing into the first evaporation unit;
• and
• a second valve being connected to the second evaporation unit and the common pipe and adjusting an amount of liquid-phase coolant flowing into the second evaporation unit, the control program causing a computer to execute control processing of
• configuring:
• a free-cooling refrigeration cycle circulating a liquid-phase or gas-phase coolant among the first evaporation unit, the first condensation unit, and the common pipe;
• and
• a compression refrigeration cycle circulating a liquid-phase or gas-phase coolant among the second evaporation unit, the second condensation unit, the compressor, the expansion valve, and the common pipe, and
• controlling either one or both of the compressor and the expansion valve, based on a differential heat value being a heat value acquired by subtracting a heat recovery amount by the free-cooling refrigeration cycle from a heat value of the heat-generating body, wherein
• pressure inside the common pipe is greater than pressure inside the first evaporation unit and pressure inside the second evaporation unit.