What is the main question your are looking to answer?
How much heat does the human body radiate?
or more completely - is a simple biophysical model of human energy expenditure?
What is the situation that has led you to ask this question?
Thinking about how shockingly model-less the discussion about diets are, then reading about some findings that cooling the body down seems to encourage weight loss and then climbing 9 flights of stairs this morning....