Heat exchanger and a system for recovery of thermal energy from waste water

Abstract

The present invention relates to a heat exchanger and a system for recovery of thermal energy from waste water. The heat exchanger comprises: an outer tube, an inner tube for waste water, and a control element, wherein said inner tube is arranged in said outer tube in such a way that a space is formed between said inner tube and said outer tube and wherein said control element is arranged in said space and is arranged to guide a medium in a helical movement around the inner tube so that thermal energy from said waste water is transferred to said medium.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat exchanger and a system for recovery of thermal energy from waste water.BACKGROUND OF THE INVENTION[0002]With increasing demands for buildings that are energy efficient and resource efficient living, much has been done to improve buildings without negatively affecting the quality of the indoor climate. Heat pumps, recovery systems for ventilation, new and better control systems for control and monitoring are installed for this purpose along with better construction materials and systems. In this way energy consumption due to transmission losses through the building envelope, ventilation losses (voluntary and involuntary), along with other combined losses have been improved.[0003]Consumption of water is a source of loss that is difficult to manage and previously has amounted to a negligible part of energy consumption. There is now, however, a need to reduce losses caused by water consumption.[0004]Some progress has been made...

AI Technical Summary

Benefits of technology

[0036]According to one embodiment the temperature of said medium when it leaves said outlet for said medium may be in the range of 8-50° C. This is advantageous since the medium can be pre-heated by the invention before it is used for various applications.

[0037]A system for recovery of thermal energy from waste water in accordance with the present invention is provided. Said system comprising a heat exchanger according to the any one of the above embodiments and at least one of a water closet, a hot water dispenser arranged to heat liquid to a predetermined temperature, and shower mixer, a kitchen mixer or a bathroom mixer, wherein said medium is water. This is advantageous since the heat exchanger can provide the water closet, the hot water dispenser, and t

Problems solved by technology

Consumption of water is a source of loss that is difficult to manage and previously has amounted to a negligible part of energy consumption.

Some progress has been made in this area in the form of low-flush showers, faucets, and toilets along with insulation of installations etc. but the remaining consumption is difficult to handle and requires some form of waste water re

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