A heating, ventilation, and air conditioning (HVAC) system includes an expansion device disposed between a condenser and an evaporator of a vapor compression system and a control panel communicatively coupled to the expansion device. The control panel is configured to: determine a liquid refrigerant level set point of the condenser based on parameters of the vapor compression system, provide a first control signal to increase an opening of the expansion device in response determining that the current liquid refrigerant level in the condenser is greater than a determined liquid refrigerant level set point of the condenser, and provide a second control signal to decrease the opening of the expansion device in response to determining that the current liquid refrigerant level in the condenser is less than the determined liquid refrigerant level set point of the condenser.

A cooling system for a vehicle is provided. The cooling system includes a condenser having a first inlet header, a first outlet header, and a plurality of first tubes connecting between the first inlet header and the first outlet header. Additionally, a radiator of the system includes a second inlet header, a second outlet header, and a plurality of second tubes connecting between the second inlet header and the second outlet header. A fan assembly is disposed in front of or behind the condenser and the radiator and includes at least one cooling fan. The condenser and the radiator are arranged side by side on the front of the vehicle.

A system for limiting access by flying animals to fans of an air-cooled condenser comprises a plurality of perimeter netting segments and interior netting segments. The fans are mounted on a framework and arranged in a matrix. Each fan comprises either (i) a perimeter fan positioned along any one of three or four outer edges of the matrix or (ii) an interior fan. Each perimeter netting segment is adapted to be positioned at least partly below a corresponding one of the perimeter fans. Each interior netting segment is adapted to be positioned at least partly below a corresponding one of the interior fans. Each perimeter netting segment has a first edge adapted to be affixed to the framework and a second edge affixed to a corresponding interior netting segment. At least a portion of each perimeter netting segment is angled inward and downward toward its corresponding interior netting segment.

Various embodiments of a generator system featuring a condenser which converts waste heat from a heat pump into electricity are disclosed herein.

A dehumidifier is provided, the dehumidifier includes a housing, and a condenser and an evaporator arranged inside of the housing that are each formed into a generally circumferentially extending C shape and arranged to be generally coaxial and aligned with one another. A compressor and a fan are each centrally located in the housing, with the fan located above the compressor. A collection pan is located under the evaporator, and a water tank is located above the condenser, evaporator, and the compressor. A pump is provided to direct the collected water to the water tank.

A compact heat exchanger assembly for a refrigeration system includes a heat rejection heat exchanger assembly and a heat absorption heat exchanger assembly. The heat rejection heat exchanger assembly includes a primary heat exchanger and a secondary heat exchanger. The primary heat exchanger has a tube bank extending between a first manifold and a second manifold. The tube bank being provided with at least one bend such that the primary heat exchanger has a generally curvilinear shape. The secondary heat exchanger is disposed between the first manifold and the second manifold.

A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are connected by pipes. The first heat exchanger includes a first refrigerant passage and a second refrigerant passage that share a plurality of fins with each other and provided in parallel in the refrigerant circuit. The apparatus further includes a high-and-low-pressure switching mechanism which is located on an inlet side of the second refrigerant passage of the first heat exchanger in flowing of refrigerant in an operation in which the first heat exchanger functions as a condenser, and which performs switching between flow directions of the refrigerant. The apparatus further includes a refrigerant blocking mechanism located on an outlet side of the second refrigerant passage of the first heat exchanger in the flowing of the refrigerant in the operation, and which blocks the flowing of the refrigerant.

A refrigeration cycle apparatus includes a refrigerant circuit, a high-side pressure sensor, an outside air temperature sensor, an outdoor fan, a fan driving unit, and a controller. The controller includes a pressure prediction unit that predicts, based on a high-side pressure detected by the high-side pressure sensor, a predicted value of high-side pressure at the elapse of a set time, a fan rotation speed control unit that, during cooling operation in which an indoor heat exchanger acts as an evaporator, adjusts the rotation speed of the fan driving unit based on the outside air temperature detected by the outside air temperature sensor and the operating capacity of an indoor unit, and an intermittent fan control unit that, if the fan driving unit is running at a set lower limit rotation speed, and if the high-side pressure is below a target value, controls the fan driving unit to perform intermittent operation, the intermittent operation being performed by setting an ON time and an OFF time such that the predicted value predicted by the pressure prediction unit approaches the target value.

Disclosed is a CO2 based refrigeration system comprising a condenser for transferring heat from a CO2 refrigerant of the refrigeration system to an air stream. The system further comprises an indirect evaporative cooler arranged to cool an air stream and supply the cooled air to the condenser to facilitate the transfer of heat from the CO2 refrigerant.

Apparatus for staged startup of air-cooled low charged packaged ammonia refrigeration system includes motorized valves on condenser coil inlets, a main compressor discharge motorized valve, a bypass pressure regulator valve in the main compressor piping, check valves on the condenser outlets and speed control of the condenser fans. The condenser inlet motorized valves provide precise control of gas feed to the condensers, so pressure can build without collapsing the oil pressure. The condenser coil outlet contains inline check valves to prevent liquid backflow when a coil is isolated. The compressor discharge line contains a single motorized valve for regulating discharge pressure at start-up. The motorized valve in the compressor discharge piping also includes a bypass with a mechanical pressure regulator to allow precise regulation at the minimum discharge pressure. Once discharge pressure rises above the minimum setpoint, the condenser inlet solenoid coils will open one at a time. The discharge pressure regulating motorized valve will simultaneously regulate the discharge pressure until the condenser coil has warmed up enough to maintain discharge pressure.