Approximately one third of a home's energy use is to heat water. Most of the hot water used is quickly drained away. A heat recovery system within your drain system can recover as much as 70% of this heat and recycles back for immediate use.
As water falls down a vertical section of drain pipe, it clings to the inner surface in a very thin film. The heat from this film is efficiently transferred to the cold water that circulates around the device on the outside of the drain pipe. The recovery system raises the temperature of incoming cold water by recycling free heat from waste water going down the drain.
Commercial Users Too!
Restaurants, Lodges, Hotels can immediately benefit by using this heat recovery solution!
Approximately 80% to 90% of all hot water energy goes down the drain can be recovered, allowing you to recycle as much as 60- 70% of wasted heat. The more hot water used, the greater the saving.
The design is simple, easy to install and contains no moving parts, nor does the system require additional electricity for recovery, circulation or heat. The simple design offers the following features:
Sample shower drain installation
Picture of Laboratory TEST in progress
GFX has the ability to recover between 60% - 75% of heat from waste water, the system can provide savings even for a 2 minute shower over a one year period. From operating the GFX, it has demonstrated an ability to recover heat under controlled conditions. In a real application, the GFX will be affected by external conditions, heating and cooling the cylinder, also, the inner GFX air temperature will alter the heat transfer and will affect the input water temperature. Therefore, it is recommended that an insulated covering of the device will improve operation. Also, contaminants or particulates in the water e.g. soap etc., will also alter the heat transfer conditions. However due to the smooth inner tube, the possibility of the build up of contaminates will be reduced, but as with any household/industrial waste water pipe, some form of build up is possible.
Northern Ireland Center for Energy Research and Technology
Dr Neil J Hewitt and Dr Peter Henderson
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