A heat exchanger is used to heat cold water at 8 C entering at a rate of 1.2 kg/s by hot air at 90 C entering at rate of 2.5 kg/s. The heat exchanger is not insulated, and is loosing heat at a rate of 28 kJ/s. If the exit temperature of hot air is 20 C, the exit temperature of cold water is (use constant specific heats at room temperature)Stuck on this heat exchanger.Please show steps and how to get the answer. Possible 37.5 C
You can calculate how much heat is given up by the hot air and how much is loss to the atmosphere. The difference in these two numbers is the amount going into the water. From that you should be able to calculate the final temperature of the water. Hint, use the temperature change and the specific heats to determine heat quanities.
in case you study the manufactuers instructions on installation, it really is going to allow you to recognize that Combi Boilers at the instant are not cautioned for showers.the reason being, that you're drawing off warm water, speedier than the Combi Biler can warmth the water, and so it runs chilly after a lengthy time period.The old boiler gadget change into positive for a bath, because the nice and cozy water provide got here from a large warm water copper tank the position the nice and cozy water change into saved. you need to position in an electric powered bathe once you've a Combi boiler. there is not any way of overcoming this difficulty.
