Stock exchangers Off-the-shelf Exchangers什么意思

英语翻译
Piping all of the water-to-refrigerant heat exchangers together in a common loop yields what is essentially an internal source heat recovery system.
it will vary depending on what type of conventional system would otherwise be used

英语翻译
Types of Heat Exchangers
Heat exchangers are equipment primarily for transferring heat between hot and cold streams.They have separate passage for the two streams and operate continuously .The most versatile and widely used exchangers are the shell-and-tube types,but various plate and other types are valuable and economically competitive or superior in some applications.These other types will be discussed briefly ,but most of the space following will be devoted to the shell-and-tube types ,primarily because of their importance,but also because they are most completely documented in the literature.Thus they can be designed with a degree of confidence to fit into a process.The other types are largely proprietary and for the most part must be process designed by their manufacturers.