Patent ID: 8505324

Claim:
A free cooling system, comprising: first and second conduits configured to carry first and second fluids respectively, the first fluid is configured to circulate within the first conduit, the second fluid is a liquid and is configured to circulate within the second conduit; a cooling load configured to engage the first conduit, and is configured to transfer heat to the first fluid, thereby causing the first fluid to have a post-loading temperature; a free cooling device configured to engage the second conduit, and is configured to transfer heat from the second fluid in a liquid state to atmospheric air, thereby causing the second fluid to have a post-cooling temperature; a heat exchanger configured to engage the first and second conduits, and configured to facilitate a heat exchange between the first and second fluids with the first and second conduits, thereby causing the first fluid to have a pre-loading temperature and the second fluid to have a pre-cooling temperature; and a fluid flow control device coupled to the first and second conduits, and configured to control a first flow rate of the first fluid and a second flow rate of the second fluid, such that the post-cooling temperature is less than the pre-loading temperature by at least a predefined temperature.