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the system is having a reversible flow and eliminates moisture or acids during the refrigeration and heating cycles. The function is based on the very large surface area of ultrafine pores inside the substance. The water absorption of the filter dryer depends on the temperature and it increases as the temperature is reduced. From this point, a filter dryer is fitted in the cold inlet line. Relatively high flow velocities take place in the intake line, filter dryers with a very large volume would have to be used to keep the pressure loss in acceptable limits. That is why, the filter dryer is normally installed in the liquid line between the evaporator and the expansion valve (Althouse, 2013). Refrigerant receivers are used to store the refrigerant. They allow to maintain the required variable refrigerant amount under various working conditions. The refrigerant receiver also has a supplementary protection function. Because of its position between the condenser and the expansion valve, it can separate vapour bubbles in the refrigerant from the liquid. Receiver volume must ensure all the heat pump freon volume. Therefore the repair work can be carried out by transferring the refrigerant into the refrigerant receiver, and no refrigerant can leak. The sight glass allows to check if the freon flowing to the throttle valve is liquid. It is necessary to install it before the expansion valve. If vapour bubbles can be seen through the sight glass, it indicates the lack of refrigerant or insufficient supercooling in the system. In addition, sight glasses often include indicators showing the water content in the refrigerant. Oil separator – the heat pump compressors receive oil from a small amount of special lubricating oil. It is distributed to a variety of compressor components. When the compressor is running, small amounts of oil come in hot, compressed freon vapour. The oil can be separated from the compressed hot steam by installing an oil separator between the compressor outlet and the condenser. The oil in the heat pump system is cooled down to a lower temperature parameter. However, it must be able to maintain high temperature in the compressor. It must remain liquid in all parts of the system. The liquidity of the oil-refrigerant mixture is determined by several factors. These include the temperature, the oil properties, the solubility of the oil in refrigerant and the solubility of the refrigerant in the oil. The internals of good refrigerant oil are: • low wax amount -separation of the wax from the refrigerant oil blend can clog up the refrigerant control openings; • good thermal stability - it should not form heavy coal deposits at the hot spots of the compressor; • good chemical stability - there should be little or almost no chemical reaction with the refrigerant or substances that are commonly found in the system; 5. Heat pumps 165PDF Image | Heat Pumps 978-83-65596-73-4
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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