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 Wysłany: Nie 0:50, 08 Maj 2011 Temat postu: ed hardy bikini Inverter air conditioner defects |
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Inverter air conditioner defects: damage caused by harmonic pollution and
Bering100081, China) Abstract: Theexperimentontheventilationheatexchangerdesignedanddevelopedbyauthorwhichwasusedasenergyrecoveryinairconditioningsystemwasperformed. Theeffectoftheindoorandoutdoortemperaturedifferencesoftheairconditioningroomandvariousfrontalairvelocitiesontheperformanceofheatexchangingandtheresistancecharacteroftheheatexchangerwasinvestigatedandtherulerelationsoftheperformanceofheatexchangingandtheresistancecharacteroftheheatexchangerwasfitted. Thenanalyzedtheenergyconservationeffectbasedonwinterdata. Theresultsshowthattheefficiencyofheatexchangingreaches64.5% andthepressurelossislessthan20Pa. Theairconditioningsystemusedtheheatexchangerobtainedremarkableenergyconservationeffectwhichshowsthatputtheheatexchangerintopracticeisfeasible, effectiveanddeservedpopularizingonenergyconservation. Keywords: ventilationheatexchanger; performanceofheatexchanging; pressureloss; energyconservation Author: Tang Zhiwei (1966 -),[link widoczny dla zalogowanych], male, Shaoyang, Hunan, Ph.D.,[link widoczny dla zalogowanych], associate professor,[link widoczny dla zalogowanych], mainly engaged in water source heat pump and ground source heat pump study, participated in the national central air conditioning duct cleaning standards complete with central air conditioning duct cleaning demonstration project. Inverter air conditioner defects: harmonic pollution and harm caused by the current market exchange frequency technology used in home air conditioning is the core of the inverter, the inverter is the power of nonlinear load, its operating frequency during power to DC voltage rectifier signal, the noise filter and high power transistor switching elements for the variable frequency AC inverter signal. In the rectifier circuit, the input current waveform is irregular rectangular wave, wave by Fourier series decomposition of the fundamental and the harmonics, which will interfere with the high-order harmonic input power supply system. Output loop current signals can be decomposed into only the fundamental sine wave and the other containing all the harmonics, harmonic and fundamental power system stack, causing waveform distortion caused by harmonic pollution. Harmonic pollution in power, will make the transmission lines, transformers and motors loss increases, resulting in significant energy waste; transformers and motor vibration and noise will be increased,[link widoczny dla zalogowanych], the temperature increases, lower life expectancy; error of energy meters and other measuring devices increases, can not correctly measure energy; power system protection error starts,[link widoczny dla zalogowanych], false tripping, tripping and damage, often caused by accidents or expand power outage; computer data transmission and automatic control system data loss, misuse showed malfunction and component damage, the TV image deterioration, roll; radio and communications caused by noise and so on. To solve the problem of harmonic inverter air conditioner, technically has been basically through, but some manufacturers consider the cost of only simple, do not want to take corresponding measures, thus the healthy development of inverter air conditioner market, adverse effects, the relevant departments can not be taken lightly . (From 2006, Volume I Pina
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