The answer is "heat transfer." Fiberglass is commonly used as insulation to reduce heat transfer, while conduction is a form of heat transfer where heat is transferred through a material.
The resistance to heat transfer of the material of the condenser pipe affects the overall heat transfer coefficient by increasing the overall thermal resistance. A higher resistance to heat transfer in the material of the condenser pipe will reduce the heat transfer coefficient, making heat transfer less effective. This can result in reduced efficiency in the condenser's operation.
The overall heat transfer coefficient represents the rate at which heat is transferred between two mediums per unit area and per unit temperature difference. It combines the individual resistances to heat transfer in conduction, convection, and radiation into a single value. A higher overall heat transfer coefficient indicates a more efficient heat transfer process.
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Yes, increasing the convective heat transfer coefficient can increase the rate at which heat is transferred to the juice, leading to a faster increase in its temperature. This is at a constant kettle surface temperature because the heat transfer coefficient affects how efficiently heat is transferred from the kettle to the juice.
Fiberglass is a good insulator of heat. It is often used in homes and buildings to help regulate temperature by reducing the transfer of heat between different spaces.
I have a book (Introduction to heat transfer - Bergmann), there is an example of an oil cooler cooled by air (crossflow heat exchanger with both fluids unmixed). There is written: "... with an overall heat transfer coefficient of 53 W/(m²*K)."
Heat transfer from the fire to the boat can occur through conduction if the boat is in direct contact with the fire or through radiation if the heat is emitted in the form of electromagnetic waves that reach the boat. Heat may also transfer through convection if the hot air or gases from the fire come into contact with the boat's surface and heat it up.
400W/mK
Fiberglass is a poor conductor of heat, which means it does not easily transfer heat. When used as insulation, fiberglass traps pockets of air between its fibers, creating a barrier that slows down the transfer of heat, making it more energy efficient. This helps to maintain a consistent temperature and reduce heat loss or gain in a building.
A decrease in the overall heat transfer coefficient due to fouling or dirt buildup can reduce the efficiency of heat transfer in a system. This can lead to a decrease in the water flow rate as the system needs to compensate for the reduced heat transfer efficiency. Increased resistance to heat transfer can result in higher energy consumption and reduced performance of the system.
The heat transfer coefficient of superheated steam is poor. Saturated steam has a better heat transfer coefficient, and also most of the heat transferred from steam occurs because of the condensation phase change.