Abstract: A fuel cell system includes a fuel cell stack and a storage tank in which at least part of generated water discharged from the fuel cell stack is stored in liquid form. The storage tank includes a first valve configured to adjust the pressure inside the storage tank to a pressure equal to or lower than a predetermined pressure that is higher than the pressure outside the storage tank.

Abstract: A fuel cell system includes a fuel cell stack and a storage tank in which at least part of generated water discharged from the fuel cell stack is stored in liquid form. The storage tank includes a first valve configured to adjust the pressure inside the storage tank to a pressure equal to or lower than a predetermined pressure that is higher than the pressure outside the storage tank.

Abstract: A heat exchanger cooling system includes: a passage extending from a water tank and branching off into a first passage and a second passage at a branch portion provided in the middle of extension of the passage, the passage including a water discharge portion provided on a distal end side of the first passage so as to face a radiator; a pump configured to send water into the passage from the water tank; a first opening-closing valve provided in the first passage and configured to open and close the first passage; a second opening-closing valve provided in the second passage and configured to open and close the second passage; and a controlling portion configured to control an operation of the pump and to control opening and closing of the first opening-closing valve and the second opening-closing valve.

Abstract: An energy conversion system includes an energy converter, a cold generator, and a liquid water obtainer. The energy converter is configured to convert energy of a source from one form to another form and generate heat and water vapor. The cold generator is configured to generate cold using the heat generated by the energy converter. The liquid water obtainer is configured to condense the water vapor using the cold to obtain liquid water. Accordingly, the water vapor generated from the energy converter can be cooled efficiently. Therefore, efficiency in obtaining the liquid water can be improved compared with a case where the water vapor is cooled by open air.

Abstract: Provided is an expander including: an expanding chamber that expands a working fluid introduced and discharges the expanded working fluid; a driving chamber housing a driving mechanism that is driven by expansion energy of the working fluid; an intermediate chamber interposed between the expanding chamber and the driving chamber ; a first seal member that seals a gap between the expanding chamber and the intermediate chamber ; a second seal member that seals a gap between the driving chamber and the intermediate chamber ; and a pressurizing unit that pressurizes a pressurized fluid filling the intermediate chamber.

Abstract: A fuel cell system includes a fuel cell stack and a storage tank in which at least part of generated water discharged from the fuel cell stack is stored in liquid form. The storage tank includes a first valve configured to adjust the pressure inside the storage tank to a pressure equal to or lower than a predetermined pressure that is higher than the pressure outside the storage tank.

Abstract: A water-spraying cooling device includes a spraying device for a heat exchanger that is configured to exchange heat between air flowing in a predetermined airflow direction and a heat medium conducted through an inside of the heat exchanger while the spraying device is configured to spray water to the heat exchanger from an upstream side of the heat exchanger in the predetermined airflow direction. The spraying device includes: a supply hole that is configured to supply the water to be sprayed to the heat exchanger; and a guide that extends downward from the supply hole in a gravitational direction and is configured to guide the water supplied from the supply hole.

Abstract: A fuel cell system includes: a fuel cell stack of fuel cells that generate electricity by electrochemical reaction between hydrogen that is a fuel gas and oxygen that is an oxidant gas; an expander that is provided on a supply path of the fuel gas to the fuel cell stack, and at which, due to the fuel gas that is in a high-pressure state being supplied thereto, the fuel gas is expanded and the pressure thereof is reduced, and, due to the fuel gas being expanded and the pressure thereof being reduced, internal energy of the fuel gas is converted into mechanical energy; and a heating device that is provided further toward an upstream side of the supply path than the expander, and that heats the fuel gas.

Abstract: Provided is an expander including: an expanding chamber that expands a working fluid introduced and discharges the expanded working fluid; a driving chamber housing a driving mechanism that is driven by expansion energy of the working fluid; an intermediate chamber interposed between the expanding chamber and the driving chamber ; a first seal member that seals a gap between the expanding chamber and the intermediate chamber ; a second seal member that seals a gap between the driving chamber and the intermediate chamber ; and a pressurizing unit that pressurizes a pressurized fluid filling the intermediate chamber.

Abstract: A heat exchanger cooling system includes: a passage extending from a water tank and branching off into a first passage and a second passage at a branch portion provided in the middle of extension of the passage, the passage including a water discharge portion provided on a distal end side of the first passage so as to face a radiator; a pump configured to send water into the passage from the water tank; a first opening-closing valve provided in the first passage and configured to open and close the first passage; a second opening-closing valve provided in the second passage and configured to open and close the second passage; and a controlling portion configured to control an operation of the pump and to control opening and closing of the first opening-closing valve and the second opening-closing valve.

Abstract: A fuel cell system includes: a pressure control valve that is disposed in a supply path for supplying hydrogen and decompresses hydrogen to be supplied to a fuel cell stack; an expander that is disposed upstream from the pressure control valve in the supply path and decompresses and expands hydrogen supplied from a hydrogen tank; a second control valve that is disposed upstream from the expander in the supply path and is able to be switched to one of an open state in which hydrogen is supplied to the expander and a closed state in which a supply of hydrogen to the expander is intercepted or an amount of hydrogen supplied to the expander is less than that in the open state; and a control device including a control unit that controls the second control valve.

Abstract: An energy conversion system includes an energy converter, a cold generator, and a liquid water obtainer. The energy converter is configured to convert energy of a source from one form to another form and generate heat and water vapor. The cold generator is configured to generate cold using the heat generated by the energy converter. The liquid water obtainer is configured to condense the water vapor using the cold to obtain liquid water. Accordingly, the water vapor generated from the energy converter can be cooled efficiently. Therefore, efficiency in obtaining the liquid water can be improved compared with a case where the water vapor is cooled by open air.

Abstract: A fuel cell system includes: a fuel cell stack of fuel cells that generate electricity by electrochemical reaction between hydrogen that is a fuel gas and oxygen that is an oxidant gas; an expander that is provided on a supply path of the fuel gas to the fuel cell stack, and at which, due to the fuel gas that is in a high-pressure state being supplied thereto, the fuel gas is expanded and the pressure thereof is reduced, and, due to the fuel gas being expanded and the pressure thereof being reduced, internal energy of the fuel gas is converted into mechanical energy; and a heating device that is provided further toward an upstream side of the supply path than the expander, and that heats the fuel gas.

Abstract: A fuel cell system includes: a pressure control valve that is disposed in a supply path for supplying hydrogen and decompresses hydrogen to be supplied to a fuel cell stack; an expander that is disposed upstream from the pressure control valve in the supply path and decompresses and expands hydrogen supplied from a hydrogen tank; a second control valve that is disposed upstream from the expander in the supply path and is able to be switched to one of an open state in which hydrogen is supplied to the expander and a closed state in which a supply of hydrogen to the expander is intercepted or an amount of hydrogen supplied to the expander is less than that in the open state; and a control device including a control unit that controls the second control valve.

Abstract: A vehicular adsorption type air conditioning device including: a heater core and an interior heat exchanger that perform heat exchange between air inside a vehicle cabin and a heating medium; an exterior heat exchanger that performs heat exchange between air outside the vehicle cabin and the heating medium; a heating flow path section that circulates the heating medium between a high temperature heat source of the vehicle and the heater core; a plurality of adsorption vessels each including an adsorption section and an evaporation-condensation section, with an adsorbent and a refrigerant sealed within the adsorption vessels; and a flow path system; the flow path system being capable of switching between a cooling mode, a first heating mode, and a second heating mode.

Abstract: A vehicular air-conditioning apparatus includes an adsorption heat pump including a plurality of containers provided with an adsorption-desorption device and an evaporation-condensation device, a circulation path configured to circulate a coolant between an internal combustion engine and the adsorption-desorption device of the container that performs a desorption process, a heat supply device that is disposed in the circulation path to heat the coolant that circulates through the circulation path, and a control device configured to control a flow rate of the coolant in the circulation path such that a flow rate of the coolant, which flows into the adsorption-desorption device of the container that performs a desorption process, is reduced to be below a predetermined flow rate when a temperature of the coolant in the circulation path on a downstream side of the heat supply device is lower than a predetermined value.

Abstract: An adsorption heat pump-equipped vehicle air conditioning device comprising: an adsorption heat pump that includes a plurality of vessels, each of which includes an adsorption section housing an adsorbent and an evaporation and condensation section inside which a refrigerant is sealed, an adsorption process and a desorption process being performed repeatedly inside the vessels; first heat exchangers respectively disposed inside each of the adsorption sections; second heat exchangers respectively disposed inside each of the evaporation and condensation sections; a first circulation route for circulating refrigerant between a high temperature heat source and a heater core; a second circulation route for circulating refrigerant between the adsorption heat pump and an interior heat exchanger, wherein the second circulation route is connected to the adsorption heat pump through a switching valve; and a controller that controls switching of the switching valve.

Abstract: An adsorption heat pump-equipped vehicle air conditioning device comprising: an adsorption heat pump that includes a plurality of vessels, each of which includes an adsorption section housing an adsorbent and an evaporation and condensation section inside which a refrigerant is sealed, an adsorption process and a desorption process being performed repeatedly inside the vessels; first heat exchangers respectively disposed inside each of the adsorption sections; second heat exchangers respectively disposed inside each of the evaporation and condensation sections; a first circulation route for circulating refrigerant between a high temperature heat source and a heater core; a second circulation route for circulating refrigerant between the adsorption heat pump and an interior heat exchanger, wherein the second circulation route is connected to the adsorption heat pump through a switching valve; and a controller that controls switching of the switching valve.

Abstract: A vehicular adsorption type air conditioning device comprising: a heater core and an interior heat exchanger that perform heat exchange between air inside a vehicle cabin and a heating medium; an exterior heat exchanger that performs heat exchange between air outside the vehicle cabin and the heating medium; a heating flow path section that circulates the heating medium between a high temperature heat source of the vehicle and the heater core; a plurality of adsorption vessels each including an adsorption section and an evaporation-condensation section, with an adsorbent and a refrigerant sealed within the adsorption vessels; and a flow path system; the flow path system being capable of switching between a cooling mode, a first heating mode, and a second heating mode.

Abstract: A vehicle cooling system includes: an adsorption refrigerating machine having an adsorber that includes an evaporation-condensation section housing a first refrigerant, the adsorption refrigerating machine being configured to cool a third refrigerant that circulates between the evaporation-condensation section and a cooler core with evaporative latent heat of the first refrigerant; a second refrigerant flow passage through which flows a second refrigerant that circulates between the adsorption section and a radiator; a bypass flow passage that bypasses the radiator; a valve that is provided at a junction of the second refrigerant flow passage with the bypass flow passage on a downstream side of the radiator; and a valve controller configured to control the opening and closing of the valve based on the temperature of the second refrigerant.