Outside temperature 85°F
Outside 85°F
Condensing temp 105°F
Head pressure 253psig
Cooling capacity 88%

FIG. 01 — Refrigeration cycle

Interactive cross-section of a refrigeration system, showing how rising outside temperature reduces cooling output. OUTSIDE 85°F Condenser — rejects heat to outside air PSIG 253 HEAD PRESSURE INSIDE REEFER Evaporator — absorbs heat from the box COOLING OUTPUT 88%

FIG. 02 — Capacity curve

Cooling capacity vs. outside temperature