Head pressure control system for refrigeration unit

Patent · Tue Apr 05 04:00:00 EDT 1988

OSTI ID:5007578

O'Neal, A

A refrigeration system having a closed refrigerant loop is described comprising: an evaporator; an air cooled condenser; a compressor connected between the evaporator and the condenser; an expansion device connected between the condenser and the evaporator; a receiver for separating gaseous refrigerant and liquid refrigerant prior to the liquid refrigerant entering the expansion device; a pressure regulating means connecting the compressor to the receiver for automatically maintaining the pressure in the receiver and the condenser in cool ambient conditions; a means connecting the outlet of the condenser to the receiver, including a check valve permitting flow from the condenser into the top of the receiver; a bypass means for diverting sub-cooled liquid refrigerant from the condenser to the expansion device, and a liquid outlet from the receiver extending downwardly from the receiver and interconnected to the bypass means at an elevation below the receiver whereby a static pressure heads of liquid refrigerant is present in the bypass means.

• Assignee: NOV; EDB-88-113625; NOV-88-013300
• Patent Number(s): US 4735059
• OSTI ID: 5007578
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
BYPASSES
CLOSED-CYCLE COOLING SYSTEMS
CLOSED-LOOP CONTROL
CONDENSERS
CONTROL
CONTROL EQUIPMENT
COOLANT LOOPS
COOLING SYSTEMS
COUPLINGS
DESIGN
EFFICIENCY
ENERGY SYSTEMS
EQUIPMENT
EVAPORATORS
FLOW REGULATORS
FLUID FLOW
FLUIDS
GAS FLOW
LIQUID FLOW
PRESSURE CONTROL
REFRIGERANTS
REFRIGERATORS
VALVES
WORKING FLUIDS