TY - RPRT TI - A water-to-water heat pump using hydrocarbon and hydrofluorocarbon zeotropic mixtures with and without an internal heat exchanger AU - Payne, W Vance II AU - Silk, Eric A AU - Domanski, Piotr A PY - 2000 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 6449 DO - 10.6028/NIST.IR.6449 ER -