How is the insulation thickness for a water tank determined?
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1. How is the insulation thickness determined for cylindrical and rectangular water tanks? It should be calculated based on anti-freezing requirements, but the insulation standards do not provide methods for such calculations. For example, if the outdoor temperature is -15°C and the temperature of the water in the tank is 20°C, with no heater present, I assume that in normal operation the water in the tank is circulated using a pump, so the water level keeps changing. In mainland China, the lowest temperatures reach around -40°C. Does that mean the water in the tank will never freeze, no matter what the outside temperature is? 3. Will the water tank freeze only when the machine is shut down?
The insulation thickness for the water tank can be 100 mm of silica cotton in accordance with design specifications, with full encapsulation being sufficient.
What I need is the calculation method, not the insulation method
What the design institute provides are the construction methods, not the calculation methods. To make the calculation, use a temperature of 60°C for the outer insulation layer and apply the thermal conductivity of the insulation material.
Provided by the SEI insulation materials team at the design institute
Yours is too general; there are no calculation methods or formulas
The ambient temperature is calculated based on the lowest local climate temperature, while the temperature inside the water tank is calculated based on the allowable lowest temperature. The thermal conductivity can be determined based on the material chosen. What’s left is routine calculation. Of course, economic factors are not taken into account here.