Calculating heat dissipation in Eldon enclosures

1 Calculating heat dissipation in Eldon enclosuresVisit our website at | 32 | Calculating heat dissipation in Eldon enclosuresHeat is the main reason for electronic component failure inside an enclosure . The service life of these components is halved, and the failure rate is doubled in the event of a 10 K temperature increase relative to the maximum permitted operating with heat losses in enclosures depends on whether the enclosure is equipped with cooling accessories, like filter fans and cooling units, and whether the enclosure is supposed to be air tight . For an enclosure that has cooling accessories installed, heat losses can be dissipated through active heat dissipation . If an enclosure has to remain closed without any cooling accessories, heat can only be dissipated through the enclosure most important factor in what type of heat transfer is possible is the maximum ambient temperature at the enclosure location and the maximum temperature inside the enclosure .

2 The maximum temperature increase relative to the environment inside the enclosure can be determined from the following equation:(Ti-Tu) = Qv / (k*A) Where: Qv- Watts to dissipateTu- Ambient temperatureTi- Permitted internal temperaturek- Heat transfer coefficientA- enclosure surface areaTo choose the most suited climate control solution for an enclosure , it is necessary to calculate the heat loss, Qv , in the enclosure . The following parameters also need to be calculated. Qv - Heat loss installed in the enclosure (W)Qs - Thermal radiation via enclosure surface Qs = k *A * TQk - Required useful cooling output (W) T - Temperature difference between inside and outside temperature (K) T = (Ti-Tu)Qe - Required cooling output (W) Qe = Qv - QsV - Required volumetric flow of fan and filter unit (m /h) Approximate calculation V = ( *Qv)/ TVisit our website at | 54 | Calculating heat dissipation in Eldon enclosuresThe maximum Internal enclosure temperature is determined by the electrical components used in the enclosure .

3 As far as the recommended internal enclosure temperature is concerned, an average value of +35 C has become the norm. In addition, the enclosure surface area must also be determined according to the installation :The tables below show the amount of heat that is dissipated (W) through the enclosure surface, when the T is 20K. The temperature difference between the ambient temperature and the maximum permitted internal temperature is then 20K: Ti (internal temperature) = 45 CTu (Ambient temperature) = 25 C T = (Ti-Tu) T = 45-25 T = 20 KExampleFree standing enclosure , MCS18044R5 Ti (internal temperature) = 50 C, Tu (Ambient temperature) = 40 C. T = (Ti-Tu) T = 50-40 T = 10K enclosure Heat dissipation value according to the table below (when T is 20K): 310W 310 / 20K = 15,5W 15,5 x 10K = 155 W If the T = 10K, the natural heat dissipation of a free standing MCS18044R5 is 155 WAll data is calculated by using the formulas presented in this you find that the natural heat dissipation presented in these lists is not enough for the enclosure application at hand, active cooling accessories may have to be installed in the enclosure .

4 Such accessories could be filter fans, heat exchangers, or Vortex coolers. Take the relevant information you have on your application and go to Eldon s website and the thermal software there to calculate cooling, heating, and control accessory installation type according to IEC 60 890 Single enclosure , free standing on all sides A= x H x (W+D) + x W x DSingle enclosure , for wall mounting A= x W x (H+D) + x H x DFirst or last enclosure in a suite, free-standing A= x D x (W+H) + x W x HFirst or last enclosure in a suite, for wall mounting A= x H x (W+D) + x W x DEnclosure within a suite, free standing A= W x H + x W x D + H x DEnclosure within a suite, for wall mounting A= x W x (H +D) + H x DEnclosure within a suite, for wall mounting, covered roof surfaces A= x W x H + 0,7 x W x D + H x DThe following tables demonstrate the amount of heat that is dissipated through the enclosure data is calculated using formulas mentioned in this you need further assistance to determine your cooling, heating, and control accessory needs, please go to the Eldon website and use the Thermal software to help you with your climate calculation.

5 Visit our website at | 76 | Calculating heat dissipation in Eldon enclosuresW ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 MCS18044R5180040040031027827824624621520 2 MCS18045R5180040050035232031228027224122 5 MCS18046R5180040060039336234631429826724 8 MCS18055R5180050050039535535531631627625 7 MCS18064R5180060040039334636231433028226 4 MCS18065R5180060050043839139935135931228 8 MCS18066R5180060060048343643638838834131 3 MCS18084R5180080040047741444538241435032 6 MCS18085R5180080050052546248542244638235 2 MCS18086R5180080060057351052546247841437 8 MCS18104R5180010004005614815294504974183 87 MCS18105R5180010005006125325724935324534 15 MCS18106R5180010006006635836155365684884 42 MCS20044R5200040040034130630627127123622 4 MCS20045R5200040050038735234330829926424 9 MCS20046R5200040060043339838034532729227 4 MCS20048R5200040080052448945441938434832 4 MCS20055R5200050050043539139134734730328 3 MCS20064R5200060040043338039834536331029 1 MCS20065R5200060050048242943838539434131 8 MCS20066R5200060060053147847842542537234 5 MCS20068R5200060080062857655850548843539 8 MCS20084R5200080040052445448941945438435 9

6 MCS20085R5200080050057650653246248841838 7 MCS20086R5200080060062855857650552345241 5 MCS20088R5200080080073266266259159152147 2 MCS20104R5200010004006165285814935464584 27 MCS20105R5200010005006715836275395834954 57 MCS20106R5200010006007266386735856205324 86 MCS20108R5200010008008367487666786956075 46 MCS22066R5220060060057852052046246240437 6 MCS22068R5220060080068462660654852947143 4 MCS22086R5220080060068460662654856849045 3 MCS22088R5220080080079671871864164156351 4W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 MCD18085R5180080050052546248542244638235 2 MCD18104R5180010004005614815294504974183 87 MCD18105R5180010005006125325724935324534 15 MCD18124R5180012004006445496125175814864 49 MCD18125R5180012005006986036595646195244 78 MCD18126R5180012006007526577056106575625 07 MCD18164R5180016004008116857806537486215 72 MCD20085R5200080050057650653246248841838 7 MCD20104R5200010004006165285814935464584 27 MCD20105R5200010005006715836275395834954 57 MCD20106R5200010006007266386735856205324 86 MCD20108R5200010008008367487666786956075 46 MCD20124R5200012004007086026725676375324 95 MCD20125R5200012005007666607226166785725 26 MCD20126R5200012006008247187716657186125 57 MCD20128R5200012008009408348697647996936 20 MCD20164R5200016004008917508557158206796 30 MCD20165R5200016005009558149117708677266 64 MCD20166R5200016006001019878966825913773 699 MCD22106R5220010006007896937316346735765 30 MCD22126R5220012006008957798377217796636 07 Floor Standing EnclosuresSteel Range | Mild Steel | Combinable.

7 Single Door | MCSF loor Standing EnclosuresSteel Range | Mild Steel | Combinable, Double Door | MCDV isit our website at | 98 | Calculating heat dissipation in Eldon enclosuresW ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 MKS12064R5120060040027524325322223220118 2 MKS12084R5120080040033429231327129225022 5 MKS14063R5140060030027724025922224020318 9 MKS14064R5140060040031427729025326522820 9 MKS14083R5140080030034229332327430525623 7 MKS14084R5140080040038233335730833328325 9 MKS16063R5160060030031327129224927122821 5 MKS16064R5160060040035431232628329725523 7 MKS16083R5160080030038532936430834328726 8 MKS16084R5160080040042937340134537331729 2 MKS16085R5160080050047341743838240334731 6 MKS16104R5160010004005054354774074493783 48 MKS16105R5160010005005524825174474824113 73 MKS18064R5180060040039334636231433028226 4 MKS18084R5180080040047741444538241435032 6 MKS18085R5180080050052546248542244638235 2 MKS18104R5180010004005614815294504974183 87 MKS20064R5200060040043338039834536331029 1 MKS20084R5200080040052445448941945438435 9 MKS20085R5200080050057650653246248841838 7 MKS20104R5200010004006165285814935464584 27 MKS20105R5200010005006715836275395834954 57W ( T =20 K)EnclosureH (mm)W (mm)D (mm)

8 1234567 MKD12124R5120012004004543914333704123483 12 MKD14103R5140010003004073453883263703082 85 MKD14104R5140010004004503884253634003393 08 MKD14123R5140012003004713974533794343603 33 MKD14124R5140012004005174444934194683943 57 MKD16124R5160012004005814965534685244404 03 MKD16125R5160012005006315465965115614764 30 MKD18124R5180012004006445496125175814864 49 MKD18125R5180012005006986036595646195244 78 MKD18164R5180016004008116857806537486215 72 MKD18165R5180016005008727458327057926666 04 MKD20124R5200012004007086026725676375324 95 MKD20125R5200012005007666607226166785725 26 MKD20164R5200016004008917508557158206796 30 MKD20165R5200016005009558149117708677266 64W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 MCSS180651800600500359320326287294255236 MCSS180851800800500429378397345365313288 MCSS181051800100050050043646840343637133 9 MCSS200662000600600434391391348348305282 MCSS200862000800600514456471413428370340 MCSS201062000100060059452255147950843639 8W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 MCDS181051800100050061253257249353245341 5 MCDS181251800120050069860365956461952447 8 MCDS201262000120060082471877166571861255 7W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 EKSS140841400800400312272292252272232212 EKSS160641600600400289255266232243209194 EKSS160841600800400351305328282305259239 EKSS161041600100040041335639033336731028 4 EKSS180641800600400322283296257270231216 EKSS180841800800400390338364312338287266 EKSS181041800100040045939443336840734231 7 EKSS200842000800400429372400343372314294 EKSS201042000100040050443247540344637434 9W ( T =20 K)EnclosureH (mm)W (mm)D (mm)

9 1234567 EKDS121241200120040037232035430233728525 5 EKDS161241600120040047540645238342936033 0 EKDS181241800120040052744950142347539736 7 EKDS181641800160040066456063853461250846 8 EKDS201242000120040057949255046452143540 5 EKDS201642000160040072961370058567155651 6 Floor Standing EnclosuresSteel Range | Mild Steel | Compact, Double Door | MKDF loor Standing EnclosuresSteel Range | Mild Steel | Compact, Single Door | MKSF loor Standing EnclosuresSteel Range | Stainless Steel | Combinable, Single Door | MCSSF loor Standing EnclosuresSteel Range | Stainless Steel | Combinable, Double Door | MCDSF loor Standing EnclosuresSteel Range | Stainless Steel | Compact, Single Door | EKSSF loor Standing EnclosuresSteel Range | Stainless Steel | Compact, Double Door | EKDSV isit our website at | 1110 | Calculating heat dissipation in Eldon enclosuresW ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 EKOM120661200600600743674674605605536475 EKOM120861200800600887795818726749657576 EKOM121261200120060011751037110696810378 99778 EKOM140661400600600847766766685685605544 EKOM140861400800600100890092782084773965 9 EKOM141851400180050016931452162613841559 13171166W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 EKOM12066-SW1200600600743674674605605536 475 EKOM12086-SW1200800600887795818726749657 576 EKOM12126-SW1200120060011751037110696810 37899778 EKOM14066-SW1400600600847766766685685605 544 EKOM14086-SW1400800600100890092782084773 9659 EKOM14185-SW1400180050016931452162613841 55913171166W ( T =20 K)EnclosureH (mm)W (mm)D (mm)1234567 ECOM160661600600600950858858766766674613 ECOM160861600800600112910061037914945822 741 ECOM180661800600600105495095084784774368 3 ECOM180861800800600125011121146100810439 04824 ECOM200662000600600115810431043927927812 752 ECOM200862000800600137112171256110211409 87906W ( T =20 K)EnclosureH (mm)W (mm)D (mm)

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