I don't know enough about thermodynamics to judge it but a quick search for "venturi effect heat pump" reveal this patent: http://www.google.com/patents/US20090

I don't know enough about thermodynamics to judge it but a quick search for "venturi effect heat pump" reveal this patent: http://www.google.com/patents/US20090183858 http://www.google.com/patents/US20090183858