Abstract: A heat exchange system and a method for determining whether flow of cooling medium passing through a heat exchanger is too low. The heat exchange system includes a refrigerant flow path in which refrigerant circulates; a cooling medium flow path in which cooling medium circulates; and a heat exchanger connected to both the refrigerant flow path and the cooling medium flow path so that the refrigerant and the cooling medium exchange heat in the heat exchanger. The heat exchange system includes a first temperature sensor arranged at a cooling medium inlet of the heat exchanger, a second temperature sensor at a cooling medium outlet of the heat exchanger, and a controller in communication with the first temperature sensor and the second temperature sensor. The controller is configured to determine whether the flow of cooling medium in the heat exchanger is too low based on a temperature difference.

Abstract: The present invention discloses an air-floating centrifugal compressor, including a motor, an impeller, an air inlet, an outlet port, and a connection pipe. The motor includes a housing and a rotor, a first chamber and a second chamber are arranged at two ends inside the housing, and an air-floating radial bearing is arranged on the rotor. The impeller is fixed to the end of the rotor and is located in the first chamber and/or the second chamber. The air inlet of the first chamber is connected to the air inlet, and the air outlet is connected to one end of the connecting pipe, the air outlet of the second chamber is connected to the outlet port, and the air inlet is connected to the other end of the connecting pipe.

Abstract: A heat exchange system and a method for determining whether flow of cooling medium passing through a heat exchanger is too low. The heat exchange system includes a refrigerant flow path in which refrigerant circulates; a cooling medium flow path in which cooling medium circulates; and a heat exchanger connected to both the refrigerant flow path and the cooling medium flow path so that the refrigerant and the cooling medium exchange heat in the heat exchanger. The heat exchange system includes a first temperature sensor arranged at a cooling medium inlet of the heat exchanger, a second temperature sensor at a cooling medium outlet of the heat exchanger, and a controller in communication with the first temperature sensor and the second temperature sensor. The controller is configured to determine whether the flow of cooling medium in the heat exchanger is too low based on a temperature difference.

Abstract: Embodiments described herein may include apparatuses, systems and/or processes to provide cooling to a heat source. In embodiments, a first set of cooling fins are thermally coupled to a heat source in a first orientation to allow first airflow to pass through in between the first set of cooling fins to dissipate heat from the heat source. A second set of cooling fins thermally coupled to the heat source in a second orientation to allow second airflow to pass through in between the second set of cooling fins to dissipate heat from the heat source. A barrier may be coupled to the second set of cooling fins to substantially divert the second airflow away from the first airflow about to pass through in between the first set of cooling fins so that pre-heated air does not flow over the first set of cooling fins.

Abstract: Embodiments described herein may include apparatuses, systems and/or processes to provide cooling to a heat source. In embodiments, a first set of cooling fins are thermally coupled to a heat source in a first orientation to allow first airflow to pass through in between the first set of cooling fins to dissipate heat from the heat source. A second set of cooling fins thermally coupled to the heat source in a second orientation to allow second airflow to pass through in between the second set of cooling fins to dissipate heat from the heat source. A barrier may be coupled to the second set of cooling fins to substantially divert the second airflow away from the first airflow about to pass through in between the first set of cooling fins so that pre-heated air does not flow over the first set of cooling fins.

Abstract: A method of allocating channels to jobs requiring a channel allocation is provided using a sequential channel allocation method, a batch channel allocation method, or a channel allocation method including the sequential channel allocation method and the batch channel allocation method in a multi-channel cognitive radio network. As a result, it is possible to rapidly and optimally allocate channels to jobs requiring the channel allocation in the multi-channel CR network and to efficiently manage the network by minimizing the number of operational channels.