Modular data center

A modular data center comprising:

• an air module comprising:
• an air module controller;
• an air intake module configured to receive first air from a first air source and to receive second air from a second air source;
• an evaporative cooling module in fluid communication with the air intake module;
• a mechanical cooling module in fluid communication with the evaporative cooling module;
• a fan array in fluid communication with the mechanical cooling module;
• wherein the air module controller is configured to cause the intake module to mix the first air and the second air based on at least a supply air temperature set point to form intake air, and wherein the controller is configured to form supply air by at least one of causing the evaporative cooling module to cool the intake air selectively based on at least the supply air temperature set point, and causing the mechanical cooling module to cool the intake air selectively based on at least the supply air temperature set point;
• one or more data center modules comprising
• a data center module controller;
• a data center module intake damper configured to control supply air entering the data center module;
• wherein the data center module controller is configured to actuate the data center module intake damper based on at least one of a temperature and humidity of air in the data center module;
• and
• a supply air conduit in fluid communication with the air module and a data center module via the data center module intake damper of the one or more data center modules to carry supply air from the air module to the one or more data center modules, wherein the air module controller is further configured to adjust an air flow of the fan array to maintain a substantially constant air pressure in the supply air conduit.