# What is the overall heat loss from an open water tank?

Date:2023-01-07
The overall heat loss from an open water tank depends on the rate of heat transfer from the water to the atmosphere and the water's surface area. Assuming a constant temperature of the water and atmosphere, the rate of heat transfer is given by Newton's Law of Cooling, which states that the temperature of a body changes at a rate proportional to the difference in temperature between the body and its surroundings: q = -hA(t - t_0) where q is the rate of heat transfer (energy per unit time), h is the heat transfer coefficient, A is the surface area of the tank, and t and t_0 are the water and surrounding temperatures, respectively. The total heat loss is then simply the total energy lost over the desired period of time.
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