A power plant must discharge cooling water to a river. However, the cooling water temperature is too high for the receiving river and must be cooled before being released to the river. To solve this problem, a cooling water pond is to be constructed between the plant and the river to cool the water from 45^oC to 35^oC in order to meet the thermal discharge standards for the river. The power plant cooling water discharge is 17 m³/s. Calculate the change in energy (heat) required to effect this change in temperature.

For question 2a, calculate the surface area of the cooling water pond, assuming an overall heat transfer coefficient of 0.0412kJ/sm2K of heat to the atmosphere and that there are no other losses of heat. 6.7106m2 1.73106m2 4.53105m2 none of the above