Solar Water Heater

Inactive Publication Date: 2015-07-23
UNIVERSITY OF ULSTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031]Preferably, the apparatus comprises a divider disposed within the outer vessel between an upper end of the inner vessel

Problems solved by technology

While solar water heating systems are very effective in some environments, in a large number of countries or regions of the world, a combination of low average daily insolation (incident solar radiation) levels and the need for freeze protection measures render commercially available domestic solar water heating systems unsuitable or prohibitively expensive.
Current systems suffer substantial heat loss during periods of low insolation and/or night-time via the large exposed aperture area, reducing the unit's efficiency and rendering it less attractive to potential users.
However, the integrated unit has a significant problem due to its unique mode of operation.
The earliest systems suffered substantially from

Method used

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Example

[0044]The preferred embodiments incorporate a pump in a solar water heating apparatus such as described in WO2010 / 1052010. The invention of the pump function can, however, be incorporated in other types of double well solar water heaters and provide advantages.

[0045]The following describes preferred embodiments only.

[0046]Referring now to FIGS. 1 and 2 of the accompanying drawings, there is illustrated a schematic view of a solar water heating apparatus, generally indicated as 10, which is adapted to effect the heating of water via solar radiation, and is particularly intended for use in the domestic market, to supplement hot water systems running on oil, gas or electricity.

[0047]The apparatus 10 comprises an outer vessel 12 which, in one embodiment, is cylindrical in form, and an inner vessel 14, again cylindrical in form in a preferred embodiment which is housed concentrically within the outer vessel 12. The vessels 12, 14 need not be cylindrical in form, and may be of any other s...

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Abstract

A solar water heating apparatus comprising inner and outer concentrically arranged vessels; a cavity defined between the vessels by an outer wall of the inner vessel and an inner wall of the outer vessel; a liquid-to-vapour phase change material provided in the cavity; an inlet for delivering unhealed water to the Inner vessel; and an outlet or withdrawing heated water from the inner vessel, and a pump which pumps the phase change material towards the inner wall of the outer vessel.

Description

FIELD OF THE INVENTION[0001]The present invention is concerned with a solar water heater, and preferably, but not exclusively, a solar water heated which is intended to be retrofitted to an existing domestic hot water supply system or the like, in order to reduce the energy requirements of such a system.BACKGROUND OF THE INVENTION[0002]Conventional solar water heating systems generally comprise a separate solar collector and water store, with pipes connecting the collector(s) to and from store(s). These systems can be either active or passive, with the active systems using an electric pump, and the passive systems relying on buoyancy forces in the form of thermosiphonic action. The collector can be anything from a simple flat plate arrangement requiring freeze protection, to the more costly evacuated (heat pipe) tube system. The collector is generally connected indirectly to the existing hot water installation, and as such, requires a twin coil hot water cylinder.[0003]While solar w...

Claims

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Application Information

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IPC IPC(8): F24J2/30F24J2/24F24S10/30F24S10/40F24S10/70F24S10/95
CPCF24J2/24F24J2/30F24D17/0021F24D2200/14F24D2220/10F28D7/082F28D15/025F28D15/04F24S10/45F24S10/75F24S10/95F24S60/10Y02B10/20Y02B10/70Y02E10/44F24S10/30F24S10/70
Inventor SMYTH, MERVYN ALEXANDER
Owner UNIVERSITY OF ULSTER
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