Vapor Compression Heat Pump: Thermodynamics for Mechanical Engineers скачать в хорошем качестве

Vapor Compression Heat Pump: Thermodynamics for Mechanical Engineers

Vapor compression heat pumps are devices that allow us to move heat from a cold region into a hot one. These devices allow heat to be transferred from a cold reservoir to a hot reservoir. This is accomplished by building a device the is colder than the cold reservoir on one side and hotter than the hot reservoir on the other side. So, the systematic process I present here can be use for both Heat Pump and Refrigeration problems. In this example, you’ll learn how to solve vapor compression heat pump cycle problems. The process is almost identical to vapor compression refrigeration cycles. The difference in the analysis is that the “energy benefit” of these two cycles is different. We characterize heat pumps by the amount of heat the deliver to the hot side of the devices. We characterize refrigeration systems by how much heat they remove from the cold side of the device. One of the most important questions to ask when solving thermodynamic cycles is “what’s the fluid”. Answering this questions lets us know how we’ll fix the states in the cycle. In this case, the fluid is a refrigerant and we fix the states graphically using a p-h diagram.