working with heat pumps and compressors
Carnot's theorem , developed in 1824, also called Carnot's rule is a principle that specifies limits on the maximum efficiency any heat engine can obtain, which thus solely depends on the difference between the hot and cold temperature reservoirs. Carnot's theorem states: All heat engines between two heat reservoirs are less efficient than a Carnot engine operating between the same reservoirs.
Carnot's theorem (thermodynamics)
Low temp compressors are the best as they have a habbit of being able to suck down nicely and tend to work at a higher pressur differance.
DIY Refrigerant Recovery Machine! - Overclockers Forums
The Homemade Heat Pump Manifesto - Page 18 - EcoRenovator
This procedure uses propane gas instead of nitrogen. Nitrogen is used in the HVAC industry because it is non-flammable and relatively safe.
*Haz/Mat fee not included. * In the USA only, Enviro-Safe 22a is sold as a second generation replacement for R407c, R404a, and MO99. Outside the US, Enviro-Safe 22a is sold as an R22 replacement.
