A counterflow heat exchanger has the hot fluid entering at one end of the heat exchanger flow path and the. Heat transfer l32 p2 temperatures for parallel and. The overall heat transfer coefficient of the exchanger is 300 wm2 k, and the area for heat transfer is 15. Che245 lab report solteq concentric tube heat exchanger. One fluid hot convectively transfers heat to the tube wall where conduction takes place across the tube to the opposite wall. Plate heat exchanger, how it works working principle hvac industrial engineering phx heat transfer duration.
A 2shell passes and 4tube passes heat exchanger is used to heat glycerin from 20c to 50c by hot water, which enters the thinwalled 2cmdiameter tubes at 80c and leaves at 40c. Experiment regarding heat exchanger concurrentcountercurrent flows at same rate and different rates. A counterflow airtoair heat exchanger with a sinusoidal plate form figure 2 is smaller than a dimple airtoair heat exchanger on a like for like basis. Effectiveness and efficiency analysis of parallel flow and. The measured outlet temperatures of the brine solution and air are tlo 27. The heat is then convectively transferred to the second fluid. Counter flow is the most common type of liquidliquid heat exchanger, because it is the most efficient. The total length of the tubes in the heat exchanger is 60 m. Combining each of these resistances in series gives. Heat exchangers 73 individual thermal resistances of the system. The optimum heat transfer rate takes place in a balanced counter flow heat exchanger and by using this optimum rate of heat transfer, the concept of heat exchanger efficiency is introduced as the. Tm is the log mean temperature difference given as t t. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions in a concentric tube or doublepipe construction.
Optimizing the performance of the heat exchanger results in efficient utilization of energy with reduction in total volume and the weight of the heat exchanger. The sinusoidal plate form may be applied to exhaust flows that include particulate. Pdf heat exchanger lab experiment chemical engineering. Design and development of parallel counter flow heat exchanger. A brine solution enters a counterflow heat exchanger at tli, 31. Che245 lab report solteq concentric tube heat exchanger unit he. Heat exchangers are devices that facilitate the exchange of heat between two fluids with high effectiveness and low investment and low maintenance cost. Pdf design and development of parallel counter flow. Counterflow heat exchanger an overview sciencedirect. Whether parallel or counterflow, heat transfer within the heat exchanger involves both conduction and convection.
400 824 404 620 201 1109 555 994 123 746 795 720 1266 315 1464 167 875 1179 637 484 1395 736 211 123 118 1312 1190 11 750 1431 1319 1077 1490 1015 787 1002 945 24