Compressed air refrigeration dryer

Energy-efficient, patented and future-proofed Higher efficiency - lower costs The innovative and highly efficient ASDB series uses a patented 3-circuit heat exchanger system. When combined with a glycol circuit, significant energy savings are achieved. The glycol mass acts as a cold trapping medium. ASD dehumidifiers are particularly suitable for part-load operation and irregular compressed air demand. By using ASD dryers, operating costs can be significantly reduced. Operation and advantages of the glycol circuit The water-glycol mixture is cooled when not all the cooling energy is needed to cool the compressed air. When the refrigeration compressor shuts down during part-load operation, the compressed air is cooled by the cold stored in the glycol mass. Only when this mass is no longer cool enough does the refrigeration compressor turn on again. ASD dryers therefore show potential for savings, especially when operating under partial load and with irregular compressed air demand. When the air compressor turns back on after an interruption and releases compressed air into the piping system, ASD dryers immediately cool this compressed air to the dew point, as the glycol mass immediately provides the required temperature. In many other systems, where the refrigeration compressor is only allowed to cool down to operating temperature after the start-up period, moist air flows into the supply network during this time, with all the negative consequences of this. Advantages at a glance Improved energy efficiency thanks to the patented 3-circuit heat exchanger system Energy savings and longer service life due to shutdown of the refrigeration compressor in part-load operation Optimum dew point control due to additional temperature sensor for glycol control Condensate drainage without pressure loss thanks to integrated electronic, level-controlled condensate separator Optimum performance under all load and ambient conditions due to variable fan speed control Long service life and reduced service costs thanks to the use of high-quality components Reduction of operating costs with active environmental protection Mode of operation of the patented 3-circuit heat exchanger system Warm saturated compressed air flows into the heat exchanger. Pre-cooling of the intake air is caused by counter-current cold exhaust air in the heat exchanger. The inlet air is brought to dew point temperature by the refrigerant circuit, resulting in the formation of condensate. The condensate is collected and removed in an integrated electronic condensate separator with level control. The glycol circuit stores excess energy and cools the intake air at partial load. The refrigeration compressor shuts down at partial load, which can double its service life. (Explained in the ASD series product description under "Function and advantages of the glycol circuit.") Air volume flow rate l/min 2400 l/min Air flow rate m3/h 144 m3/h Maximum pressure 16 Bar Air connection 3/4 " Energy consumption 0.51 kW Operating conditions Max. Compressed air inlet temperature t1 60 °C Ambient temperature range ta max 50 °C