Solar evacuated tube collector for heat exchange in micro-channel

A technology of vacuum tube heat collector and micro-channel, applied in the field of solar energy utilization, can solve the problems of little cooling or heating, heat exchange efficiency of heat sink and low heat collection temperature, etc., to avoid freezing of pipeline water and light weight. , the effect of high heat transfer performance

Inactive Publication Date: 2011-06-22
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since the circulating working medium in the heat-absorbing metal tube (or glass tube) of the solar vacuum tube collector is usually water (except for the heat pipe vacuum tube collector), the heat transfer efficiency and heat collection temperature of the heat absorbing body are low, and usually Can only be used for heating hot water and rarely for other forms of cooling or heating

Method used

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  • Solar evacuated tube collector for heat exchange in micro-channel
  • Solar evacuated tube collector for heat exchange in micro-channel
  • Solar evacuated tube collector for heat exchange in micro-channel

Examples

Experimental program
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Embodiment 1

[0035] Such as Figure 1~5 As shown, a solar vacuum tube heat collector with micro-channel heat exchange includes: glass tube 1, micro-channel tube bundle 2, liquid return pipe 3, gas collection chamber 4, liquid collection chamber 5, air guide tube 6, and liquid guide tube 7 , and the external gas collection main pipe 8, gas connecting pipe 9, condensation section 10, liquid connecting pipe 11, and liquid collecting main pipe 12 form a separate circulation pipe;

[0036]Wherein the gas outlet at the upper end of the tiny channel tube bundle 2 is inserted into the gas collecting chamber 4 and the end surface of the gas outlet is higher than the bottom surface of the inner cavity of the gas collecting chamber 4, and the liquid inlet at the lower end of the micro channel tube bundle 2 is inserted into the liquid collecting chamber 5 and its liquid outlet end face is close to the bottom surface of the liquid collection chamber 4 inner cavity; the air outlet at the upper end of th...

Embodiment 2

[0046] Such as figure 2 The solar vacuum tube heat collector of another kind of tiny channel heat exchange shown, its structure is identical with embodiment 1, and the sectional view of its A-A face is image 3 with Figure 4 , the difference is that: the two ends of the micro-channel tube bundle 2 in the glass tube 1 are respectively bent toward the central axis of the glass tube 1, and the upper and lower bent ends respectively form the upper gas outlet and the lower liquid outlet of the micro-channel tube bundle 2, which are respectively connected to the collector The air cavity 4 communicates with the liquid collecting cavity 5 .

Embodiment 3

[0048] Such as Image 6 Another kind of solar vacuum tube heat collector with micro-channel heat exchange is shown, and its single-tube elevation is figure 1 , the profile is image 3 with Figure 4 ; The only difference from Embodiment 1 is that a liquid pump 15 is provided on the liquid connecting pipe 11 . The capillary force in the tiny channel tube bundle 2 and the liquid pump 15 jointly drive the circulating working medium to work, which is generally applied to the occasion where the condensing section 10 is on the lower glass tube 1 .

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Abstract

The invention discloses a solar evacuated tube collector for heat exchange in a micro-channel. The micro-channel comprises a glass tube, a micro-channel tube bundle, a liquid return tube, a gas collecting cavity, a liquid collecting cavity, a gas guide tube and a liquid guide tube which form a separating type circulating tube together with an external condensation section, wherein a circulating working medium capable of generating gas-liquid phase change within the heat-collecting temperature area range is filled into the separating type circulating tube, and the filling amount of the circulating working medium is 10 to 90 percent of the inner volume of the separating type circulating tube, so that the circulating working medium has a stable airlift pump effect in the micro-channel. In the solar evacuated tube collector, by utilizing the high heat transfer efficiency and unique airlift pump effect of the micro-channel, the heat transfer efficiency of a solar collector is improved, the weight of a heat absorption body in the conventional evacuated tube solar collector is reduced, and the heat-collecting temperature is improved, so the expansion of the application temperature area range and the application occasion range of the evacuated tube solar collector is facilitated.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a solar vacuum tube heat collector for heat exchange through tiny channels. Background technique [0002] The solar collector is the core component of the solar thermal utilization process, and its efficiency is related to the effect of solar thermal utilization. Common solar collectors mainly include solar flat panel collectors and solar vacuum tube collectors. Solar flat plate collectors are gradually replaced by solar vacuum tube collectors due to factors such as high energy consumption, short life, and vulnerability to external environmental influences. Compared with solar flat plate collectors, solar vacuum tube collectors have the advantages of less energy consumption, long life, less impact from the external environment, high thermal efficiency, etc., and have occupied most of the current domestic market. [0003] However, since the circulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/32F24J2/46F24J2/50F24S10/95
CPCY02E10/44F24J2/32F24J2/055F24S10/45F24S10/95
Inventor 刘利华姜守忠张光玉
Owner ZHEJIANG SCI-TECH UNIV
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