The use of the drain water heat recovery has become usual when owners seek some energy recovery in new constructions or during renovations. However, it is obvious that due to the design of this particular piece of pipes induces a relativeley consistent pressure loss (too many loops with a D shape tube). So at the…

I attended last year and also in January two ASHRAE conferences about the use of CO2 as refrigerant in the chillers. I shared the subject in the form of a scheme that highlights the idea of captation of emitted anthropogenic CO2 and reuse as refrigerant. As I did not get feed back from Ashrae members…