i'm doing this experiment on heat exchanger. I'm supposed to discuss the effect of changing the flow rate on the overall heat transfer coefficient as well as the effect on the temperature and efficiency. I need some help so anything would be great.
I can offer you is an advice, to get involved in the calculating work with the straight forward formula you have got in hand, and do not ask people to do a whole tedious work for you. To help you a little more, make sure that you convert the dimension of layers thicknesses from cm to m before you have ago. good luck.
the higher the flow rate the higher heat transfer, the higher the efficiency, and greater the temp change. the pay back is the higher the flow rate, the greater the pressure loss, the bigger pump you need. in alot of real world applications, the acceptable fluid pressure loss, is fixed, so the heat exchanger max. allowable pressure loss is fixed, so the flow rate must be managed, which means a bigger surface area. so the heat transfer can be obtained, without going over the acceptable fluid pressure loss. ps. i designed shell and tube and plate heat exchangers for 6 years.
