Mass attenuation coefficient of silicone polymer

[Mattressi]

I'm trying to work out how much energy from sunlight will be absorbed (converted to heat energy) by a silicone polymer.

I need the mass attenuation coefficient (from what I can tell at least) so that I can work out the amount of heat energy the water inside a black silicone polymer container would absorb if the container were left in sunlight. I'm still not quite sure how to fully figure this out though (I'd surely need to take into account the heat capacity of the silicone polymer, as well as the surrounding air, because not all of the heat given out by the container would be absorbed by the water).

If anyone could help with this it would be much appreciated. Any relevant formulae and variables to take into account would be great.

Thanks.

 

[Navin A S]

The amount of energy absorbed by a material is determined by its mass attenuation coefficient. This coefficient can be found in tables that list the coefficients for different materials. Once you have the mass attenuation coefficient, you can then calculate the energy absorbed from sunlight using the following formula: Energy Absorbed = (Mass Attenuation Coefficient x Solar Radiation) / (2 x Mass Density of Material)In this equation, Solar Radiation is the amount of energy from the Sun that is being received by the material, and Mass Density of Material is the mass density of the material in kg/m3.You will also need to take into account the heat capacity of the silicone polymer and the surrounding air. The heat capacity is the amount of heat required to increase the temperature of a material by one degree Celsius. You can use the following formula to calculate the total heat capacity of the system: Total Heat Capacity = (Heat Capacity of Polymer + Heat Capacity of Air) x Volume of SystemOnce you have the total heat capacity, you can calculate the amount of energy absorbed by the system by multiplying the total heat capacity with the change in temperature of the system caused by the sunlight.

 

[oswaler]

The mass attenuation coefficient (MAC) of a material is a measure of how well it attenuates or reduces the intensity of a beam of radiation as it passes through the material. In the case of sunlight, the radiation is in the form of electromagnetic waves, and the MAC of silicone polymer will determine how much of that energy is absorbed and converted to heat energy.

To calculate the amount of energy absorbed by the water inside a black silicone polymer container, you will need to consider several factors. First, you will need to determine the MAC of the silicone polymer, which can vary depending on the type and thickness of the material. This information can typically be found in tables or databases provided by material manufacturers or scientific organizations.

Next, you will need to take into account the heat capacity of the silicone polymer, which is a measure of how much heat energy is required to raise the temperature of the material by a certain amount. This value can also vary depending on the type of silicone polymer and can also be found in tables or databases.

In addition, you will need to consider the surrounding air temperature and its heat capacity, as well as the temperature of the water and its heat capacity. All of these factors will play a role in determining how much heat energy is absorbed by the water in the container.

To calculate the amount of heat energy absorbed by the water, you can use the following formula:

Heat energy absorbed = MAC x thickness of silicone polymer x intensity of sunlight x (1 - reflectance) x (1 - transmittance)

where "reflectance" is the proportion of sunlight that is reflected off the surface of the silicone polymer, and "transmittance" is the proportion of sunlight that passes through the material without being absorbed.

In summary, to accurately determine the amount of energy from sunlight that will be absorbed by the water inside a black silicone polymer container, you will need to consider the MAC of the material, its thickness, the heat capacities of both the silicone polymer and the surrounding air and water, and the reflectance and transmittance of sunlight through the material. It is also important to note that other factors, such as the angle of the sunlight and the duration of exposure, may also affect the amount of heat energy absorbed.