Evaporators and Metering Devices

Explains the function and construction of evaporators. Covers direct-expansion, dry-expansion, and flooded evaporators, as well as systems using multiple evaporators. Discusses ways to boost evaporator performance. Explains evaporator defrosting, maintenance, and troubleshooting. The online course goes on to describe the function, operation, and maintenance of various metering devices, including hand-operated, automatic, thermostatic, thermal-electric devices. This course has no prerequisites. Evaporators and Metering Devices is available in online maintenance training and course manual formats. Lesson 1 - Introduction to Evaporators Topics: Evaporator operation; Latent and sensible heat; Evaporator capacity; Temperature differential; Circulation velocity Learning Objectives: – Explain the function of the evaporator in a refrigeration system. – List five main factors affecting evaporator capacity, and explain how each can be optimized to gain the grea