Modular waterside economizer integrated with air-cooled chillers

A chiller system comprising:

• a vapor compression cycle circulating a refrigerant and including:
• a condenser, the condenser including a condenser housing and at least one condenser fan configured to circulate a first flow of air through the condenser housing, and wherein the condenser is configured such that, in operation, the refrigerant is cooled by the first flow of air, and
• an evaporator, the evaporator configured to receive fluid from a first fluid loop, and wherein the evaporator is configured such that, in operation, heat from the fluid of the first fluid loop is rejected to the refrigerant;
• an economizer receiving fluid from the first fluid loop and including an economizer module, the economizer module including:
• a module housing,
• a heat exchanger assembly including at least one heat exchanger coil, the heat exchanger assembly located within the module housing, and
• at least one economizer fan configured to circulate a second flow of air through the module housing, wherein the economizer is configured such that, in operation, fluid from the first fluid loop is cooled by the second flow of air;
• wherein the module housing is attached to the condenser housing such that the first flow of air through the condenser housing is generally parallel to the second flow of air through the module housing, wherein the first flow of air and the second flow of air are discrete airflows defined by the condenser housing and the module housing, respectively.