Metal heat-absorbing plate material of solar heat collection pipe

Abstract

The invention discloses a metal heat-absorbing plate material for a solar heat collecting tube, which comprises the following components by weight: 40 parts by weight of polyurethane resin, 20 parts by weight of acrylic resin, 5 parts by weight of silicon dioxide, 2-bromine-2 ‑(2‑fluorophenyl)‑1‑cyclopropyl ethyl ketone 1‑5 parts by weight, indium tin oxide 2‑6 parts by weight, antimony tin oxide 1‑5 parts by weight, vanadium oxide 3‑7 parts by weight, modified 2-6 parts by weight of casein, 1-5 parts by weight of sodium ammonium nitrate sodium acetate, 5-9 parts by weight of sodium sulfate decahydrate, 1-5 parts by weight of chlorinated paraffin, 3-7 parts by weight of butyl acetate, 2-6 parts by weight of color paste Parts by weight, 1-5 parts by weight of cyclohexanone, 1-10 parts by weight of ethylene glycol, 0.5-2.5 parts by weight of molybdenum, 0.4-0.8 parts by weight of nickel, and 5-9 parts by weight of adhesive. The invention has the advantages of spectral selectivity, high visible light absorption rate and low emissivity, high thermal efficiency, good light transmission, strong adhesion, good weather resistance of the coating, high hardness, high temperature resistance, etc., ensuring High thermoelectric conversion efficiency and high use intensity.

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