The Selection Of Fan And Energy-saving Analysis Base On The Measured Data Of The Central Air Conditioning System

Eight fans of the six central air conditioning systems are tested on operation conditions. According to the measured data, we can calculate the performance parameters of fan. Compared the air volume of design conditions and operation conditions,the efficiency of rated conditions and operation conditions, we can make an energy analysis.Testing and analysis show that, the fans of the central air conditioning widespread exist that type selection are greater than the fans of system required. Compared to the design condition, the air volume of rated conditions are growth for 9.14% on average. Compared to reasonable conditions, the full pressures of rated conditions are growth for 93.88% on average. Obviously, the differences of air volume are smaller while full pressures larger between rated and operation conditions. Visible, the main reasons are the system hydraulic calculation was not accurate enough or fan full pressures overmuch.And the results of this phenomenon are that fan running condition will gravely deviates from reasonable condition. Compared with design conditions, the growth of air volume is on average 23.47%. If reasonable selection, the energy consumption can reduce 53.59%. If using throttling to achieve design flow, the fan energy consumption can reduce 7.4% on average.