Abstract
A combined circulation system of spray evaporative cooling and air cooling (CCSSECAC) is a way to enhance the cooling performance of an air-cooled electric machine while maintaining its existing structure. Based on a traditional air-cooled machine, when the discrete evaporative cooling medium particles are scattered into the airflow, they will reach the heat source with the air circulation. The cooling capacity of the cooling system is enhanced simultaneously through the phase transition and convection heat transfer. Ultrasonic atomization is a simple way to produce tiny droplets and a good way to improve the performance of CCSSECAC. To verify the effectiveness of such a system, a principle test model was built and a multi-operational condition experiment was carried out as an exploratory study. The experimental results showed that the new cooling system was feasible for horizontal machines, and the stator coil temperature was significantly reduced compared with the air-cooled mode.
Highlights
As is well known, the larger the capacity of the single electric machine, the less material consumption per unit capacity and the more economical it is
The right amount of discrete evaporative cooling medium particles, i.e., Freon, is mixed with the airflow to participate in the air Processes 2021, 9, 1773
The right amount of discrete evaporative cooling medium particles, i.e., Freon, is mixed with the airflow to participate in the air circulation
Summary
The larger the capacity of the single electric machine, the less material consumption per unit capacity and the more economical it is. There is no denying that, restricted by the physical properties of air, the capacity of the air-cooled machine increases more and more slowly. System of Spray Evaporative Cooling and Air Cooling for an Electrical Machine. The structure of a combined circulation system of spray evaporative cooling and air cooling (CCSSECAC) for an electrical machine is an optimization method for improving a traditional air-cooled machine. In this system, the right amount of discrete evaporative cooling medium particles, i.e., Freon, is mixed with the airflow to participate in the air Processes 2021, 9, 1773 Processes 2021, 9, 1773 a traditional air‐cooled machine. The refrigerant absorbs heat and, once it reaches its boiling point, vaporizes acnidrcaublastoirobns. mThuecrhefmriogreerahnetaat.bFsoigrubsreh1eaist aansdc,hoenmcaetiitcroeaf cChCesSSitEsCbAoiClin. gThpeoinnotz, vzlaepsoorrizaetsoamn‐d dThTiisnzoaatsucrdehhiheetuuobruanoeeorfeeorsmtrredsfelgociltsasiaegadhaearqtrcranaebnresrugealerstestaomioaousnofdnitmantrosrduogagrpftrraucrtssaaeeauionahotcscdsfcsrnndnirheeodscfiigdaddaogoormcftteneooelleoheadalarwdtnorsertrgnobaircsodonorrtnesnhteuoenoositwodehgsgdttrwatiobreaphisictetinarynspotnhcaititatsanwofto.hmhotbtiosdlnrFchoeilssaeateeaiteoohagaftcntlarfatinamhuitoaspitqenitdrrrehnnrhtdu,oedioetkegcoiuiobi1fditainnafrgfyntrosiacaitahhsertiorunavhfiosdeancls.ooatcauiaiuhfditstaTrttadcbecciltaflahneoihisusgnqioofen.eertalaktunwhaq.Tmhsmnti.tuefiSohdesi,foaSoeioietsttrricolanenmihtiteamcsmsmqt.dretuaeuciooSiivueptvobisofouirafcoedntsocfmClgepreio.ufetdahlqCohewvtltoStsauhhrSeuatsoosatheeeSpstirmdfthonteeEoidthartvneteeCrcoohrnr.emcaooopfeAldoiAtinpcrultipqfCdevchodlsfgueeturretoe.eshrtithiolThlcadnscacaiepttethnoostahtiuliletoegooedrloeoarirentllqrnenscsmiicwonnsdhu.ooloapoAggeiizniatfdrttldszotedneshamtsalimcthideetutcsratchehnse.hlmeiadyefesarTodcur.eitrhlrihoihuoesreicTueoqeaneemtwhmtaialtuddthogioetetniiieeneatmdarrbslghndsseoliyhmqimeltcuaazioaeeotuntiireoslanrehurrycitrsss‐t.d.doeesst caauttsaecdhmbyentht eofadttraocphlmetesnttootfhderfoapnl.ets to the fan.
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