What is the approximate thermal conductivity of plexiglass?

Plexiglass is a polymer compound made from the polymerization of methacrylates. The surface is smooth, colorful, small specific gravity, high strength, corrosion resistance, moisture resistance, light resistance, good insulation performance, and good sound insulation. It can be divided into three types: profile, bar profile and plate profile.

The polymers obtained by polymerization of acrylic acid and its esters are collectively referred to as acrylic resins, and the corresponding plastics are collectively referred to as polyacrylic acid plastics, among which polymethacrylate methyl ester is the most widely used.

It should be, generally at 20 degrees Celsius.

Plexiglass, also known as polycarbonate hollow board (also known as sunlight board, glass caphlon board, PC hollow board), is made of high-performance engineering plastics --- polycarbonate (PC) resin, with high transparency, light weight, impact resistance, sound insulation, heat insulation, flame retardant, anti-aging and other characteristics, is a high-tech, comprehensive performance of extremely excellent, energy-saving and environmentally friendly plastic plate, is currently the international commonly used plastic building materials, has other building decoration materials (such as glass, plexiglass, etc.) can not be comparedIt is widely used in commercial, factory, stadium lighting canopy and sunshade canopy, agricultural greenhouse, aquaculture and flower greenhouse, as well as kiosks, newspaper kiosks, stations and other public facilities, highway sound insulation, advertising decoration fields.

Generally, the heat transfer coefficient of the metal window of a single layer of 3mm thick glass is , ug — the heat transfer coefficient of the glass (w m2·k).

The heat transfer coefficient used to be called the total heat transfer coefficient. The current national standards and specifications are uniformly named as heat transfer coefficient. The heat transfer coefficient k value refers to the heat transferred by the unit time through the unit area of the air temperature difference of 1 degree (k or ) under the condition of stable heat transfer, and the unit time is watts (square meters ·degree) (w ·k, where k can be replaced), reflecting the strength of the heat transfer process.

g — Linear heat transfer coefficient (w m2·k) around the glass perimeter, field test.

At present, there are mainly the following methods for detecting the thermal resistance heat transfer coefficient of the wall on site: heat flow meter method and power (known as the hot box method in the industry, in order to maintain unity and convenient communication, it is still called the hot box method) and unsteady state method.

The basic idea of the heat flux meter method is to use the heat flux meter to measure the heat flow through the measured wall, and at the same time measure the temperature on both sides of the wall, and then calculate the thermal resistance and heat transfer coefficient of the measured wall.

The thermal conductivity of glass is. Thermal conductivity refers to the heat transferred by 1 square meter area in a certain period of time through the area of 1 square meter of a material with a thickness of 1 m and the temperature difference between the surfaces of 1 m thick material under stable heat transfer conditions.

Isotropic, homogeneous glass has the same properties in all directions, such as refractive index, hardness, elastic modulus, thermal expansion coefficient, etc.

Metastability, when the melt is cooled into a glass body, it can retain the structure at high temperature at a lower temperature without changing, and has strong structural properties.

Reversible gradient and continuity, the conversion from molten state to glass state is reversible and gradual, and the physical and chemical properties change with temperature when the molten state is transformed into glass state.

The heat transfer coefficient (referred to as k value or u value) refers to the heat transferred through an area of 1 square meter within 1 second of the air temperature difference on both sides of the envelope structure under stable heat transfer conditions. The heat transfer coefficient of architectural glass refers to the heat transfer from one side of the glass assembly per unit area to the other side of the air per unit area when the ambient temperature difference between the two sides is 1k( ).

The metric unit of heat transfer coefficient is w (k), where w is the thermal power, the glass area, and k is the temperature in Celsius. The imperial unit of heat transfer coefficient is btu (ft2·h· where btu is the imperial heat, h is the hour, ft2 is the square foot, and is the temperature in Fahrenheit. The conversion relationship between the two units is:

1BTU (FT2·h· ) China and major European countries use the metric system, and North American countries such as the United States mainly use the imperial system.

Thermal conductivity refers to the heat transferred by 1 square meter area within 1 second of a 1m thick material with a temperature difference of 1 degree (k, °C) between the surfaces of a 1m thick material under stable heat transfer conditions. The thermal conductivity is related to the composition and structure, density, moisture content, temperature and other factors of the material, and has nothing to do with the size, shape and thickness of the material itself, but only related to the composition of the material itself, so the thermal conductivity of similar materials is the same.

To put it simply, the "thermal conductivity" is the property of the material itself, which has nothing to do with the actual thickness of the plate and the surrounding environment, while the "heat transfer coefficient K value (U value)" is related to both the thickness of the plate and the surrounding environment.

The heat transfer coefficient of V-glass can be as low as that of thick V-glass than that of thick brick walls.

<><What is the thermal conductivity of glass

At. This is also known as thermal conductivity, which represents the physical quantity of the thermal conductivity of the material, and the thermal conductivity of the material is also composed of composition, physical structure, as well as state, temperature, pressure and other changes, and the thermal conductivity is Fourier's law.

How to choose the right glass

1. It depends on the brand

Generally speaking, glass products have registered trademarks of relevant units, and they also have a reasonable positioning of the first company, which also has a perfect after-sales system, so that consumers can be more assured.

2. Look at the packaging

When purchasing, you should also look at whether the box has a factory name, as well as the origin, color, specifications, quality assurance certificate, product quality inspection report and other relevant information, and the product with complete information can be more safe and reliable.

3. Inspect the gum

When selecting products, to do the following 6 inspections, you need to smell the smell, but also to see if there is a pungent nose, but also to see whether the gloss is good, but also to see if there are particles, to see if there are bubbles, and finally to see whether the curing effect is good, whether the viscosity is qualified.

4. Look at the appearance

Also look at the appearance of the product to see if there are any impurities, scratches, bubbles and other related defects, if there are the above defects, the use of deformation, glass transparency and other related problems, is not suitable for use.

5. It depends on the processed products

When purchasing, you should also look at whether the processing quality is qualified, whether the product specifications and sizes are standard, whether the pattern is clear, and whether the corners are defective.

The thermal conductivity of glass wool refers to the heat transferred by the 1m thick material under stable heat transfer conditions, the temperature difference between the surfaces on both sides is 1 degree (k, °C), and the heat transferred through the area of 1 square meter within 1 hour, expressed in watts (meters), w (m k) (w m k, where k can be replaced).

The thermal conductivity of glass wool is related to the composition and structure, density, moisture content, temperature and other factors of the material. Thermal conductivity, also known as "thermal conductivity" or "thermal conductivity", is an important physical quantity that reflects the thermal properties of a material.

This characteristic has nothing to do with the size, shape, or thickness of the material itself, but only with the composition of the material itself. Therefore, the thermal conductivity of similar materials is the same, and it will not change due to different thicknesses.

The thermal conductivity of tempered glass is: watts per meter per open.

Thermal conductivity, also known as thermal conductivity or thermal conductivity, is a physical quantity that represents the thermal conductivity of the material, the thermal conductivity of the material changes with the changes in composition, physical structure, material state, temperature, pressure, etc., the derivation of thermal conductivity is based on Fourier's law, which is defined as the heat transferred by the unit temperature gradient through the unit thermal conductivity surface per unit of time.

Thermal conductivity is one of the thermal physical parameters of materials, and it is also the most important thermal physical parameter of solids, and the thermal conductivity of materials with low thermal conductivity is an important parameter to characterize the physical properties of building energy conservation and insulation materials, and the accurate measurement of its parameter values has very important theoretical and application value.