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US 7,823,628 B2Granted
Passive back-flushing thermal energy system
AssigneeQueen's University at Kingston
InventorStephen J. Harrison
Life of this patent
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Abstract
This invention provides a thermal energy system comprising a heat exchanger for transferring thermal energy between a source and a load, the heat exchanger having a primary side associated with the source, and a secondary side for conducting a fluid associated with the load, wherein the secondary side of the heat exchanger is passively back-flushed upon consumption of a portion of the fluid. Passive back-flushing prevents fouling of the heat exchanger due to sediments, scale, and mineral deposits which may be present in the circulating fluid.
Claims11
A module for use with a thermal energy system, comprising:
- a heat exchanger for transferring thermal energy between a source and a load, the heat exchanger having a primary side associated with the source, and a secondary side for receiving fluid to be heated and outputting heated fluid, the fluid flowing through the secondary side of the heat exchanger in a first direction;
- an input for receiving mains fluid for said load;
- and
- a single back-flushing valve for back-flushing the secondary side of the heat exchanger;
- wherein the back-flushing valve routinely directs unheated mains fluid through the secondary side of the heat exchanger in a second direction opposite to the first direction without user intervention.
2 more elements
Dependencies are inferred from the claim text.