The liquid line temperature was limited to just above the outdoor temperature and as more and more refrigerant was added to the system the head pressure and therefore the condensing temperature was going sky high resulting in poor system efficiency. In so doing, the latent heat is released by the substance and transferred to the surrounding environment. Compressor Discharge Line The condenser can be piped into a system with either one or multiple compressors. The approach method is a calculation based on the relationship of liquid line temperature to outdoor temperature. The normal cause of a high liquid line temperature is a dirty condenser coil . Condensers are used for efficient heat rejection in many industrial systems. 06-07-2008, 02:18 PM #2. To calculate approach, subtract outdoor ambient from actual liquid line temperature. You can feel this with the back of your hand. If the suction line isn't cold, or the liquid line isn't warm, servicing should be recommended. Mr Bill. In systems involving heat transfer, a condenser is a heat exchanger used to condense a gaseous substance into a liquid state through cooling. A lack of adequate cooling in the house and possible compressor damage are the implications. Check the condenser coil. Prof is dead right as usual. The condenser subcooling process starts at Point 3 and continues to the end of the condenser. The outdoor temperature used to calculate approach should always be taken in the shade and away from the hot condenser discharge air. A dirty outdoor coil restricts airflow and the air that does leave the unit is a much higher temperature. A condenser approach is a difference between liquid refrigerant temperature as measured on the liquid line, and leaving condenser water temperature. superheated refrigerant vapor is condensed, rejecting its sensible and latent heat in the condenser. The reasons for this will be explained in the sample pipe described later on. Increasing charge will increase condensing pressure and temperature. If its 98 degrees outside. the liquid drain line from the outlet of the evaporative condenser to the high pressure receiver. Look for the suction line to be at roughly 45F to 55F, and the liquid line to be at about 90F to 110F. How hot can a liqiud line get on a hot day. The performance of a condenser can be evaluated with the help of the condenser approach. In this video we discuss discharge line temperature in HVAC and refrigeration systems. At the same time, also at the compressor/condenser unit, the high-pressure refrigerant line (refrigerant leaving the compressor to return to the indoor air handler and evaporator coil) will be hot. High temperature liquid line will also correlate with the condenser air discharge. Generally, the condenser approach for a water-cooled chiller will be in the range of 0 to 4 degrees. AOP Residential HVAC; liquid line temperature ... liquid line temperature I just got my certification and I am still learning the trade. The liquid that is cooler than the saturated liquid in the condenser is called subcooled liquid. Subsequently, the liquid refrigerant flows from the condenser through the expansion valve, where pressure and temperature are reduced to those in the evaporator, thus completing the cycle. RE: High liquid line temps quark (Mechanical) 10 Jul 03 00:47. If temperature measurements at the condenser outlet tubing and the end of the liquid line are significantly different, the problem is most likely _____. Figure 2.4: Basic Refrigeration Cycle (Green, 2008) Damage are the implications described later on the air that does leave the unit is calculation. Subtract outdoor ambient from actual liquid line temperature is a calculation based on the relationship of liquid temperature. 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