Hello, I'm new to these forums and hoping I can get some help with a project I'm undertaking in college. The project is to model a waste heat recovery system using an Organic Rankine Cycle (ORC). What I'm currently looking at is my waste heat source (exhaust gas from a natural gas engine). The parameters I'm considered with at present are the exhaust gas temperature and the specific heat of the exhaust gas. Searching these parameters on the internet provisionally, I seem to be getting exhaust gas temperatures of approximately 1000 Kelvin for a 1.5 MW MAN gas powered engine, and specific heat seems to be between 1 - 1.3 kJ/kgK. However these sources aren't as reliable as I'd like (not that they aren't accurate, but I'd like a bit more concrete proof or references if that's possible). Any help would be greatly appreciated as I haven't looked at the gas engine side of the project in more detail as it's only the exhaust port of this that concerns the ORC, so it's likely I'm going about it the wrong way.