Abstract: Disclosed is a thermal conductivity measuring device including a sample fixing member that fixes a sample, an elastic member that presses the sample fixed to the sample fixing member downwards, and first auxiliary heat emitting part that is spaced apart from the sample fixing member upwards while the elastic member being interposed therebetween.

Abstract: A device includes a heat exchanger connected to an air line through which air flows and to a hydrogen line through which liquid-state hydrogen flows. The heat exchanger is configured to produce liquid-state air as the air and the liquid-state hydrogen exchange heat with each other. The device also includes a carbon dioxide separator connected to the heat exchanger via the air line and the hydrogen line. The carbon dioxide separator is configured to separate at least a portion of carbon dioxide from the air. The device also includes an air storage container connected to the heat exchanger via the air line. The air storage container is configured to store the liquid-state air discharged from the heat exchanger. The carbon dioxide separator is configured such that the air and the hydrogen exchange heat with each other inside the carbon dioxide separator.

Abstract: A device includes a heat exchanger having one end connected to an air line through which air flows, and the other end connected to a hydrogen line through which liquid-state hydrogen flows. The heat exchanger is configured to produce liquid-state air as the air and the liquid-state hydrogen exchange heat with each other. The device also includes an air storage container connected to the heat exchanger via the air line and configured to store the liquid-state air discharged from the heat exchanger, and an evaporator connected to the air storage container via the air line and configured to evaporate the liquid-state air, supplied from the air storage container, through heat exchange. The device additionally includes a power generator configured to receive the air, discharged from the evaporator, via the air line, thereby producing electrical power.