
Study finds R717 and R600 more efficient in geothermal heat pumps
Ammonia and n-butane systems in residential building had higher COPs than R134a and R22 systems.
Ammonia and n-butane systems in residential building had higher COPs than R134a and R22 systems.
Purdue paper says MicroGroove-tube design uses 41% less internal volume with a 57% reduction in footprint, while maintaining heat transfer performance.