System for head pressure control

A cooling system comprising:

• a heat exchanger;
• a thermal expansion valve configured to control the delivery of liquid phase refrigerant to the heat exchanger;
• a condenser fluidly coupled to the thermal expansion valve and configured to condense gas phase refrigerant to liquid phase refrigerant, the condenser including:
• a gas header configured to receive gas phase refrigerant, the gas header separated into at least two sections, a first section and a second section, each section having an inlet port;
• a liquid header disposed downstream from the gas header, the liquid header separated into at least two sections, a third section and a fourth section, which correspond to the first section and the second section of the gas header, respectively, each section of the at least two sections having an outlet port in fluid communication with the heat exchanger;
• parallel tubes extending between the gas header and the liquid header;
• a head pressure control valve positioned downstream and in between the outlet port of the third section and the outlet port of the fourth section of the liquid header;
• and
• a pressure sensor positioned downstream from the outlet port of the third section of the liquid header;
• and
• a controller coupled to the control valve and the pressure sensor, the controller being configured to place the control valve in a closed state to close off fluid communication between the outlet port of the third section of the liquid header and the outlet port of the fourth section of the liquid header when a pressure of the outlet port of the third section of the liquid header as determined by the pressure sensor is below a predetermined value, and configured to place the control valve in an open state to allow fluid communication between the outlet port of the third section of the liquid header and the outlet port of the fourth section of the liquid header when a pressure of the outlet port of the third section of the liquid header as determined by the pressure sensor is above the predetermined value, wherein the open state of the control valve enables liquid phase refrigerant from the outlet port of the third section of the liquid header to enter the outlet port of the fourth section of the liquid header.