Exercises
Capillary expansion device
Of all the expansion devices in use, the capillary is certainly the simplest. It consists of nothing more than a simple length of refrigeration tubing of small diameter, which results in a very low cost. In addition, there are no mechanical components, and no adjustment is required. This produces excellent reliability and long term performance.
Despite the precautions that we'll be discussing in this chapter, the many advantages of the capillary expansion device explain its presence in a diverse range of small capacity equipment, especially where it is mass-produced. These include air-conditioning units, domestic refrigerators, small heat pumps, small chiller units etc.
The object of this chapter is to highlight the precautions that need to be taken when servicing a refrigeration system fitted with a capillary expansion valve...
EXERCISE : There is no liquid receiver shown at the condenser outlet.
In your opinion, should there be a liquid receiver in the system? Why?
(Solution : Refrepair Manual pages 315 to 324)
