What do you need to know about refrigerant lines?

The refrigerant Condensate line must: • provide sewer-type flow; that is, free draining of liquid refrigerant in one direction, while refrigerant vapour flows adjacent to the liquid in the other direction. The Hot Gas Defrost line must:

What should the velocities of refrigeration lines be?

Good refrigeration piping design requires that the refrigeration lines be pitched in the direction of flow at approximately 1/2 inch per 10 feet or 1 inch per 20 feet. Refrigerant velocities in vertical lines should be at least 1500 ft/min to ensure good oil return; velocities in horizontal lines should be at least 750 ft/min.

What kind of piping is used on refrigeration lines?

Vince the two common piping attachment on refrigeration lines are soldered/brazed copper tubing at which a female connecting end is prepared using a swaging tool, and in some communities, carefully-prepared flare fittings. Details are in the article above. Question: Are exposed copper refrigerant lines ok outdoors?

What are the steps in the refrigeration manual?

Proper refrigerant feed to the evaporator must be maintained, and excessive pressure drop in the refrigerant piping must be avoided. If these give steps are accomplished, then operation of the system is reasonably certain to be trouble free. If any one is neglected, then eventual operating problems are almost certain to occur.

How to draw a refrigeration cycle on a P-H diagram?

Point 1 to 4 show the following. 2. Draw the following refrigeration cycle on a p-h diagram. Conditions may be given as follows. Meanings of both are the same. Draw a horizontal line (1) crossing both on a saturated vapor line and saturated liquid line at 30℃. The length of the line is adjusted later. Shorter the line is, easier adjusted.

How to draw an isentropic line for refrigerant?

An isentropic line is a curve. Since the refrigerant is a subcooled liquid of 25℃, draw a vertical line (4) that passes through a saturated liquid line for 25℃ (Point E). An intersection point (Point 3) of the line (4) and the line (1) shows a position before the expansion valve.

How to draw a curve from a refrigerant?

Draw a curve (3) from Point 1 parallel to an isentropic line. An isentropic line is a curve. Since the refrigerant is a subcooled liquid of 25℃, draw a vertical line (4) that passes through a saturated liquid line for 25℃ (Point E). An intersection point (Point 3) of the line (4) and the line (1) shows a position before the expansion valve.

What do you need to know about refrigerant lines?