1. A solar water heater for domestic hot-water supply uses solar collecting panels with a collection efficiency of 60% in a location where the average solar-energy input is 200 W/m2. If the water comes into the house at 68.00 F and is to be heated to 140.00 F, what volume of water can be heated per hour if the area of the collector is 30.0 m2?

2. In one cycle, a freezer uses 785 J of electrical energy in order to remove 1750 J of heat from its freezer compartment at 100 F.

What is the coefficient of performance of this freezer?

How much heat does it expel into the room during this cycle?

Answer rating: 100% (QA)

Problem 1 Solar Water Heater First we need to find out how much solar power the collector receives in watts We know that the collection efficiency is ... View the full answer