Hello everybody, I have been here before, with different username and cause i didn't log into long time ago, the username doesn't work for m now, so here i am with the new user. Just as a respect for the forum rules, to not post a topic once i register. i am doing cooling load calculations, for cooling a 5 cubic meters volume water tank, drains 1000l/day, exposed to sun, installed on building roof, to cool water from 55 to 25 celcuis degrees, working hours of the coil is 12hrs during the day. i am thinking to insulate the tank, so solar heat gain won't be taken into account for cooling load, and it will be only the heat transfer between the water and fereon cooling coil, which can be calculated using the formula: q= m*c*delta t i calculated it, and the result didn't make sense to me, so i need your help with the calculation result. will appreciate your reply, as i am in urgent need to do that work. Thanks in advance.