If what you mean is whether we could take say, a kilojoule of raw heat and use it to convert say, a nontrivial amount of ADP plus phosphate into ATP at no other energetic cost than cooling something, the short answer is "No". About the only simple energetic profit in physiology that I can think of in using ambient heat rather than burning food, is that if we are warm, we don't consume fuel, such as fat from brown adipose tissue, to raise or maintain our temperatures.

This is not as negative as it sounds at first. The usable range of temperature would be less than ten degrees C, about what it would take to reduce a mouthful of hottish tea from drinkably hot to body temperature. Just the physiological energy in the milk would be more than enough to outweigh that amount of heat.

It is not clear by what physiological, biochemical mechanism we could capture such heat anyway, and if we could think of some such way in principle, the selective burden of adapting our genome to implement it would far outweigh any advantage. Evolutionarily it would be far more profitable to arrange matters to acquire an extra mouthful of food every few days.

Cheers,

Jon