Abstract: A heat pump system includes a refrigerant circuit in which a compressor, a refrigerant flow path included in a heat medium heat exchanger, an expansion valve, and a heat source side heat exchanger are connected, the heat medium heat exchanger including the refrigerant flow path and a heat medium flow path; a heat medium feed path connected to the heat medium flow path included in the heat medium heat exchanger; an indoor unit connected to the heat medium feed path and configured to condition air inside a room; a room temperature sensor configured to detect an indoor temperature in the room; a heat medium temperature sensor configured to detect a temperature of a heat medium that flows into the indoor unit; and a controller configured to control the refrigerant circuit or the indoor unit by using a set temperature in the room.

Abstract: A heat pump system includes a refrigerant circuit in which a compressor, a refrigerant flow path included in a heat medium heat exchanger, an expansion valve, and a heat source side heat exchanger are connected, the heat medium heat exchanger including the refrigerant flow path and a heat medium flow path; a heat medium feed path connected to the heat medium flow path included in the heat medium heat exchanger; an indoor unit connected to the heat medium feed path and configured to condition air inside a room; a room temperature sensor configured to detect an indoor temperature in the room; a heat medium temperature sensor configured to detect a temperature of a heat medium that flows into the indoor unit; and a controller configured to control the refrigerant circuit or the indoor unit by using a set temperature in the room.

Abstract: A fluid power generation device is configured to provide electric power generation using fluid action, and comprises multiple power generation mechanisms. Each power generation mechanism comprises: a casing that allows a fluid to pass through its internal space; and a power generation unit arranged within the casing, and configured to perform electric power generation using the fluid action. The casing is configured to generate vortexes in the vicinity of its fluid outlet. The multiple casings are arranged with spaces as intervals between them. Each casing generates vortexes in the vicinity of its fluid outlet. Furthermore, such an arrangement provides an interaction effect between the vortexes generated in the vicinity of the fluid outlets of the multipole casings arranged with the spaces as intervals between them. This provides a synergistic effect for accelerating the inner flow based on the interaction between the power generation mechanisms.

Abstract: A fluid power generation device is configured to provide electric power generation using fluid action, and comprises multiple power generation mechanisms. Each power generation mechanism comprises: a casing that allows a fluid to pass through its internal space; and a power generation unit arranged within the casing, and configured to perform electric power generation using the fluid action. The casing is configured to generate vortexes in the vicinity of its fluid outlet. The multiple casings are arranged with spaces as intervals between them. Each casing generates vortexes in the vicinity of its fluid outlet. Furthermore, such an arrangement provides an interaction effect between the vortexes generated in the vicinity of the fluid outlets of the multipole casings arranged with the spaces as intervals between them. This provides a synergistic effect for accelerating the inner flow based on the interaction between the power generation mechanisms.

Abstract: A wind turbine generator system is provided with a nacelle supporting a wind turbine rotor, a nacelle rotation mechanism, an anemometer, and a control apparatus controlling the nacelle rotation mechanism. Said control apparatus calculates the wind direction deviation from the wind direction measured by the anemometer and the direction of the wind turbine rotor. Said control apparatus performs a yaw rotation of the nacelle by the nacelle rotation mechanism when any of conditions (1) and (2) is satisfied; the condition (1) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a first threshold value continues for a first duration predetermined, and the condition (2) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a second threshold value larger than said first threshold value continues for a second duration shorter than said first duration.

Abstract: A wind turbine generator system is provided with a nacelle supporting a wind turbine rotor, a nacelle rotation mechanism, an anemometer, and a control apparatus controlling the nacelle rotation mechanism. Said control apparatus calculates the wind direction deviation from the wind direction measured by the anemometer and the direction of the wind turbine rotor. Said control apparatus performs a yaw rotation of the nacelle by the nacelle rotation mechanism when any of conditions (1) and (2) is satisfied; the condition (1) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a first threshold value continues for a first duration predetermined, and the condition (2) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a second threshold value larger than said first threshold value continues for a second duration shorter than said first duration.