Solar flat plate collector capable of exchanging heat through micro-channel

A solar panel and micro-channel technology, which is applied in the field of solar energy utilization, can solve the problems of low heat exchange efficiency and heat collection temperature of the heat sink, large area of ​​the heat sink, and difficulty in popularizing non-top buildings, and achieves a single flow direction. , Improve heat exchange efficiency and reduce weight

Inactive Publication Date: 2011-06-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solar flat plate collectors have the characteristics of simple structure and low price, but the circulating working medium in the heat absorbing body is usually water (except for heat pipe flat plate collectors), and the heat transfer efficiency and heat collection temperature of the heat absorbing body are relatively low. It can only be used for heating hot water, and rarely can be used for other forms of cooling or heating; and the heat absorber in the solar flat panel collector has a relatively large area and heavy weight (especially when the heat absorber is made of metal) ), most of the solar panel collectors are limited to the use of top-floor buildings with roofs, and it is difficult to promote them in non-top-floor buildings

Method used

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  • Solar flat plate collector capable of exchanging heat through micro-channel
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  • Solar flat plate collector capable of exchanging heat through micro-channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 and 2As shown, a solar flat panel heat collector with micro-channel heat exchange consists of a transparent cover plate 11, a heat absorbing plate 1, a heat insulation layer 12, a frame 13, a gas collecting pipe 3, a liquid collecting pipe 4, a liquid return pipe 5 and several The micro-channel tube bundles 2 arranged in parallel and in parallel are composed of a gas collecting pipe 3, a liquid collecting pipe 4, a liquid return pipe 5 and several micro-channel tube bundles 2 arranged in parallel and in parallel with the external condensation section 8 to form a separate circulation pipe, and the gas collecting pipe 3 The height is higher than the height of the liquid collecting pipe 4, so that the liquid formed in the gas collecting pipe 3 flows back into the liquid collecting pipe 4 from the liquid return pipe 5.

[0031] In the above-mentioned separated circulation tube, the air outlet at the upper end of the micro channel tube bundle 2 is inserted ...

Embodiment 2

[0046] Such as Figure 4 Another kind of micro-channel heat-exchanging solar flat panel collector shown, its A-A sectional view is the same as figure 2 Consistent with that shown, the only difference from Embodiment 1 is that a liquid pump 10 is provided between the liquid connection pipe 7 and the condensation section 8, and the lower liquid outlet of the condensation section 8 is connected to the liquid through the second valve 102. The liquid inlet of the pump 10 is connected, and the liquid outlet of the liquid pump 10 is connected with the liquid inlet of the liquid connection pipe 7 through the first valve 101 . It is applicable that the liquid level in the condensation section 8 is always lower than the liquid level in the tiny channel tube bundle 2 . Its work flow is similar to embodiment 1, and difference is that the liquid level of condensing section 8 is lower than the liquid level in microchannel tube bundle 2, and there is reverse liquid level difference in cond...

Embodiment 3

[0048] The structure is similar to that in Example 1, except that the inclination angle of the micro-channel tube bundle 2 is adjusted to 90°, placed on a sunny outer wall, and the working fluid is driven by the bubble pump effect of the circulating working fluid in the micro-channel tube bundle 2 Flow to the cooling section 8. This flat plate collector is very suitable for non-top-level building users.

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Abstract

The invention discloses a solar flat plate collector capable of exchanging heat through a micro-channel, which comprises a transparent cover plate, a heat-absorbing plate, a thermal-protective coating, a frame, an air collecting pipe, a liquid collecting pipe, a liquid-return pipe, and a plurality of parallel micro-channel pipes forming a detachable type circulating pipe together with an external condensation section, wherein the air collecting pipe is higher than the liquid collecting pipe; a circulating fluid which has gas-liquid phase change within a heat-collecting temperature scope is filled in the detachable type circulating pipe; the volume of the filled circulating fluid is 10%-90% of the volume of the detachable type circulating pipe; and a stable airlift pump effect is formed in the micro-channel by the circulating fluid. By utilizing the high heat-transfer efficiency of micro-channel and the specific airlift pump effect, the heat-transfer efficiency of the solar flat plate collector is increased, the weight of a heat absorber in the traditional solar flat plate collector is reduced, and the range of application temperature and the scope of application occasion of the solar flat plate collector are widened.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a solar panel heat collector for heat exchange through tiny channels. Background technique [0002] The solar collector is a device that absorbs solar radiation and transfers the generated heat energy to the heat transfer medium. It is the core component of the solar thermal utilization process, and its efficiency is related to the effect of solar thermal utilization. Household solar collectors are generally divided into solar flat panel collectors and solar vacuum tube collectors. Solar flat plate collectors have the characteristics of simple structure and low price, but the circulating working medium in the heat absorbing body is usually water (except for heat pipe flat plate collectors), and the heat transfer efficiency and heat collection temperature of the heat absorbing body are relatively low. It can only be used for heating hot water, and rar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/24F24J2/32F24S10/70F24S10/95
CPCF24J2/32Y02E10/44F28D15/0266F24S10/95
Inventor 陈光明刘利华唐黎明
Owner ZHEJIANG UNIV
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