Hello, I have to design a heat exchanger for my uni course and am a little stuck with where to start. I know a little about LMTD and OHTC etc etc. my main starting problem is finding material properties for ethylene glycol, I have tried Engineering Toolbox but for the maximum temperatures I am a little stuck for a 50/50 mixture (the reason it is 50/50 is because of a previous assignment using this ratio). I could do with some pointers on this if any of you could help. Here is the proposed problem: " A heat exchanger design is required to remove heat from the engine coolant of an MX5 sports car. The constraints for the problem are as follows: The space envelope available is 850 mm by 400 mm by 45 mm The coolant enters at 110oC, leaves at 70oC and the exchanger is required to remove 99 kW of heat. The heat is dissipated into atmospheric air travelling at 100 km.h-1 through the heat exchanger. Aspects of the design that need to be determined are: The material properties and flow rate of the coolant. The size, shape and material for the heat exchanger design. The thermal properties of the coolant, air and solid material. The overall thermal performance of the system." Also any units as a UK standard please, if you don't mind.