Abstract: This heat pump and dehumidifying apparatus have small energy-consumed per moisture-removed ratios. Their components include a pressurizer for raising refrigerant pressure; a condenser for condensing refrigerant, thereby heating a high-temperature heat source fluid; an evaporator for evaporating refrigerant to cool a low-temperature heat source fluid; and a heat exchanger in a refrigerant path connecting the condenser and the evaporator for evaporating and condensing refrigerant under an intermediate pressure between the condensor pressure and the evaporator pressure. The low-temperature heat source fluid is successively cooled by the heat exchanger, cooled by the evaporator, and heated by the heat exchanger. This fluid can be precooled by the heat exchanger before cooling in the evaporator, and heat removed during precooling can be returned to the fluid after cooling by the evaporator.

Abstract: This heat pump and dehumidifying apparatus have small energy-consumed per moisture-removed ratios. Their components include a pressurizer for raising refrigerant pressure; a condenser for condensing refrigerant, thereby heating a high-temperature heat source fluid; an evaporator for evaporating refrigerant to cool a low-temperature heat source fluid; and a heat exchanger in a refrigerant path connecting the condenser and the evaporator for evaporating and condensing refrigerant under an intermediate pressure between the condensor pressure and the evaporator pressure. The low-temperature heat source fluid is successively cooled by the heat exchanger, cooled by the evaporator, and heated by the heat exchanger. This fluid can be precooled by the heat exchanger before cooling in the evaporator, and heat removed during precooling can be returned to the fluid after cooling by the evaporator.

Abstract: A heat pump with a high coefficient of performance and a dehumidifying apparatus consumes a small amount of energy per amount of moisture removal. The heat pump includes a pressurizer for raising a pressure of a refrigerant; a condenser for condensing the refrigerant to heat a high-temperature heat source fluid; an evaporator for evaporating the refrigerant to cool a low-temperature heat source fluid; and heat exchanger disposed in a refrigerant path connecting the condenser and the evaporator for evaporating and condensing the refrigerant under an intermediate pressure between the condensing pressure of the condenser and the evaporating pressure of the evaporator 210. The low-temperature heat source fluid is successively cooled by the heat exchanging means, cooled by the evaporator, and heated by the heat exchanger in such order.

Abstract: A dehumidifying apparatus capable of continuously supplying dry air having an absolute humidity of 4 g/kgDA or lower is provided.

Abstract: A dehumidifying apparatus capable of continuously supplying dry air having an absolute humidity of 4 g/kgDA or lower is provided.

Abstract: Driven turbomachinery for use in centrifugal and mixed flow pump overcomes operational for overcoming difficulties, such as flow separation and generation of surge at low flow rates, often encountered in similar machines of the conventional design. The turbomachinery is provided with variable-angle inlet guide vane and variable-angle diffuser vanes, and the diffuser section is constructed according to a fluid dynamic principle, and the vanes having a wing shape are distributed tangentially so that the diffuser section acts as a centrifugal diffuser. A convenient operational parameter, chosen from such variables as input current to the drive motor, rotational speed or torque of the drive motor, inlet/exit pressures, and fluid velocity, is monitored during the operation by means of sensors strategically attached to parts of the operating system.

Abstract: A turbomachine having variable angle diffuser vanes is demonstrated with the use of a centrifugal pump. The performance of a diffuser is enhanced greatly by the use of adjustable angle diffuser vanes which can be set to a wide range of vane angles to provide a variable size of an opening between adjacent vanes. The demonstrated pumping system has a significantly wider operating range than that in conventional pumping systems over a wide flow rate, and is particularly effective in the low flow range in which known diffuser vane arrangements would lead to surge in the entire system and other serious operational problems. A number of examples and formulae are given to demonstrate the computational methods used to select a vane angle for a given set of operating conditions of the turbomachine.

Abstract: A turbomachine having variable angle diffuser vanes wed with a centrifugal pump. The performance of a diffuser is greatly enhanced by the use of adjustable angle diffuser vanes which can be set to a wide range of vane angles to provide a variable size of an opening between adjacent vanes. The demonstrated pumping system has a significantly wider operating range than that in conventional pumping systems over a wide flow rate, and is particularly effective in the low flow rate range in which known diffuser vane arrangements would lead to surge in the entire system and other serious operational problems.

Abstract: A solids-liquid separator comprises a basin in which liquid containing solids is introduced from an inlet port of the basin in a direction tangential to the side wall of the basin so as to produce a swirling flow of the liquid. The swirling flow also generates a secondary flow, and both flows promote the floating of floatable solids on the surface and the settling of settlable solids on the bottom. The solids floating on the surface are discharged by the overflowing liquid and the settled solids are discharged through a discharge pipe opening at the bottom of the basin. The liquid from which solids are separated is discharged outwardly from an outflow opening of the basin independent from the discharge of solids. The inlet port and outflow opening are separated circumferentially with respect to the flowing direction so that the circumferential separation thereof subtends at least 180 degrees about the center of the basin.