A refrigeration system includes a trailer refrigeration unit including a refrigerant circuit through which a refrigerant is circulated. The trailer refrigeration unit includes a condenser. A fuel cell is configured to generate electrical power for the trailer refrigeration unit. A coolant circuit includes a radiator configured to dissipate heat generated by the fuel cell. The condenser and the radiator are positioned such that each of the condenser and the radiator receives a flow of unconditioned ambient air.