Metal heat-absorbing plate material of solar heat collection pipe

Abstract

The invention discloses a metal heat-absorbing plate material of a solar heat collection pipe. The metal heat-absorbing plate material comprises, by weight, 40 parts of polyurethane resin, 20 parts of acrylic resin, 5 parts of silicon dioxide, 1-5 parts of 2-bromo-2-(2-fluorophenol)-1-cyclopropyl ethyl ketone, 2-6 parts of indium tin oxide, 1-5 parts of antimony tin oxide, 3-7 parts of vanadium oxide, 2-6 parts of modified casein, 1-5 parts of ammonium nitrate sodium acetate, 5-9 parts of sodium sulfate decahydrate, 1-5 parts of chlorinated paraffin, 3-7 parts of butyl acetate, 2-6 parts of color paste, 1-5 parts of cyclohexanone, 1-10 parts of ethylene glycol, 0.5-2.5 parts of molybdenum, 0.4-0.8 part of nickel and 5-9 parts of binder. The metal heat-absorbing plate material has good performances like high light spectrum selectivity, high visible light absorptivity and low emitting rate, has high heat efficiency, has the advantages of high light transmitivity, high binding performance, high coating weatherability, high hardness and resistance to high temperature, and high thermoelectric conversion efficiency and high using strength are guaranteed.

Description

Technical field [0001] The invention relates to the technical field of solar energy, in particular to a metal heat-absorbing plate material of a solar heat collecting tube. Background technique [0002] A solar collector is a device that converts the radiant energy of the sun into heat. Because solar energy is relatively scattered, we must try to concentrate it. Therefore, the collector is a key part of various solar energy devices. Due to different uses, collectors and their matching system types are divided into many types with different names, such as solar cookers for cooking, solar water heaters for generating hot water, solar dryers for drying items, and Solar furnaces for smelting metals, as well as solar houses, solar thermal power stations, solar desalinators, etc. [0003] An important part of the solar collector tube is the heat-absorbing plate. At present, it is commonly used in the market to spray black organic coatings on the heat-absorbing core, such as black fluo...

AI Technical Summary

Problems solved by technology

At present, it is generally used in the market to spray black organic coatings on the heat-absorbing plate core, such as black fluorocarbon resin, black epoxy resin, black polyurethane resin, etc., because ordinary resin materials are used as adhesives and carbon black Or black pigment is used as the color body, so it will cause: 1. The coating is not weather-resistant, premature chalking and fading, 2. Since ordinary carbon black or black pigment is used as the color body, there is no spectral selectivity, so it The emissivity of the coating is very high, which results in low thermal efficiency of the solar panel collector