High Temperature Working Fluids and Nonazeotropic Mixtures in Compressor Driven Heat Pumps

摘要

Several firms around the world offer the data necessary for engineering calculations. The data are organized in so-called data banks. The data banks can often be used either as pure data sources or as subroutine packages used in connection with a simulation or design program. Important pure component properties of hydrocarbon and other substances are stored either as point values or fitted to equations in order to cover a wide temperature and pressure range. Five commercially available data banks are briefly presented: PPDS, KEYDATA, DETHERM, EPIC, and TISDATA. Many more data banks exist in the world, but the five mentioned above are chosen as examples to illustrate what data banks can offer. Data banks also exist at technical universities. The university data banks are normally not open to the public, but used in research and education. They will not be considered in this work. Some engineering firms also support their own data banks. Their banks are not open for others to use and are not discussed here. The most important facts about the five data banks mentioned are presented. Some comments on each data bank are given. 359 references. (ERA citation 10:022797)