Solar 'dull-gloss heat-absorption slot fin type' assembled heat-gathering panel

Abstract

The invention relates to a solar 'dull-gloss heat-absorption slot fin type' assembled heat-gathering panel which comprises a water inlet copper pipe, an aluminum fin, a heat conductive copper pipe and a water outlet copper pipe, wherein the assembled heat-gathering panel is used for a condensation system arranged on a solar 'flat' heat-gathering machine or a solar 'photovoltaic' generating plate. The traditional structure, material and technique are all changed, so the cost is lowered. By using a secondary absorbing technique, the radiation absorptance alpha of the panel is increased to 96% and the temperature of water stored in a 100-liter water tank is increased by 2 DEG C; by increasing the heat transfer rate q of the panel, a q / T value, namely the ratio of q to a temperature difference between the average temperature of the panel and a heat-transfer medium, is increased to 23.6 W / DEG C from 7.2W / DEG C of the prior art; the heat conducting property of a 0.8mm copper panel is achieved, but the material cost is only one fifth of the original cost; the temperature difference between the average temperature of the panel and the temperature of the heat-transfer medium in a heat-conducting pipe is decreased to below 4 DEG C from the traditional 12 DEG C; the temperature of the stored water is increased by 8 DEG C; the temperature in winter is wholly increased by 10 DEG C; and 11.6 kilowatt hour electricity is saved when one ton of bath water is used. Compared with the 0.25mm copper panel, the panel provided by the invention has the advantages that the material cost of the panel is reduced by 30% and the heat efficiency is increased by 38%. The solar 'dull-gloss heat-absorption slot fin type' assembled heat-gathering panel has the characteristics of reasonable structure, simple process, low cost and obvious effect.

Description

technical field [0001] The present invention relates to a heat-collecting panel of a "flat-plate" solar water heater and a condensation panel of a solar "photovoltaic" power generation panel, especially a heat-collecting panel that can significantly improve its efficiency and low cost, and belongs to the application of solar energy field. Background technique [0002] The effective heat collecting area of ​​the prior art solar “flat plate” water heater is 0.96m×1.94m (flat plate area 1M×2M), the effective area utilization rate reaches 93%, the transmittance α of the glass plate is 93%, and the heat collecting surface The radiation absorption ratio α of sheet metal is 88%, then the theoretically achievable maximum energy efficiency is 93%×93%×88%=76%. The theoretical maximum energy efficiency of the "vacuum glass heat collecting tube" water heater is only 55%, and the actual 33.5% is actually 33.5% after deducting the hot water energy retained in the tube. However, the therm...

AI Technical Summary

Problems solved by technology

At the same time, there are still problems such as the current structure of the heat collecting panel and the "photovoltaic" electric panel are difficult to be flattened, which affects the actual condensation effect.

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