Suva refrigerants. Properties and Performance of Suva 407C and Suva 410A in Air Conditioners and Heat Pumps. Technical Information

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1 Technicl Informtion Suv refrigernts ART-14 Properties nd Performnce of Suv 407C nd Suv 410A in Air Conditioners nd Het Pumps Introduction Chlorodifluoromethne (R-22 or HCFC-22) hs een commercilly ville for use in vrious refrigertion, industril cooling, ir-conditioning, nd het pump pplictions for over five decdes. The low ozone depletion potentil of HCFC-22, compred with CFC-11 nd CFC-12, nd its excellent refrigernt properties hve helped fcilitte the trnsition wy from CFCs. However, s ntionl nd interntionl policy mkers continue to strengthen regultions towrds the protection of the ozone lyer, HCFC-22 nd other hydrochloro-fluorocrons (HCFCs) will e phsed out. By identifying potentil lterntives for HCFC-22 tody, DuPont provides equipment mnufcturers nd users with time to fully test HCFC-22 lterntives efore they re needed. DuPont hs developed Suv 407C s the equivlent pressure replcement for HCFC-22 in positive displcement, direct expnsion ir conditioners nd het pumps, nd hs developed Suv 410A, ner-zeotrope, s replcement for use in new equipment designed for the higher operting pressures of Suv 410A. Environmentl nd Sfety Properties of Suv 407C nd Suv 410A Suv 407C is ternry mixture of hydrofluorocrons (HFCs) HFC-32, HFC-125, nd HFC-134 in the rtio of 23/25/52 wt%. Suv 410A is inry mixture of HFC-32 nd HFC-125 in the rtio of 50/50 wt%. Environmentl nd sfety properties of Suv 407C nd Suv 410A re listed in Tle 1. Tle 1 Environmentl nd Sfety Properties of Suv 407C nd Suv 410A versus HCFC-22 Suv Suv 407C 410A HCFC-22 Ozone Depletion Potentil (CFC-11=1.0) Glol Wrming Potentil (CO2=1.0[100 yr ITH*]) Flmmle No No No *Integrted Time Horizon The components of Suv 407C nd Suv 410A hve undergone extensive toxicity testing y the Progrm for Alterntive Fluorocron Toxicity Testing (PAFT). Results from this testing indicte tht the components of Suv 407C nd Suv 410A hve very low toxicity. The clculted DuPont Acceptle Exposure Limit (AEL) of oth products, sed upon the AEL for ech component, is 1,000 ppm, 8- nd 12-hour time weighted verge (TWA). This AEL is the sme s the Threshold Limit Vlue (TLV) estlished for HCFC-22. Suv 407C nd Suv 410A liquid nd vpor compositions re nonflmmle nd will remin nonflmmle during shipping, storge, hndling, nd use in equipment.

2 Tle 2 Performnce of Suv 407C Reltive to HCFC-22 in Unmodified Air Conditioners nd Het Pumps Rnge of Performnce: Cooling Mode Reltive Cpcity, % 2 to +3 Reltive Energy Efficiency 7 to 3 Rtio (EER), % Chnge in Dischrge Temperture, 8.3 to 4.4 C ( F) Temperture ( 15 to 8) r to kp +103 to +276 psi +15 to +40 Rnge of Performnce: Heting Mode Reltive Cpcity, % 7 to +6 Reltive Energy Efficiency 6 to 3 Rtio (EER), % Chnge in Dischrge Temperture, 10 to 0 C ( F) ( 18 to 0) r to kp +62 to +234 psi +9 to +34 Vlues compred with HCFC-22 in unmodified split system het pumps nd n unmodified window ir conditioner using the DOE cooling test conditions A nd B. Vlues compred with HCFC-22 in unmodified split system het pumps nd n unmodified window ir conditioner using the DOE heting test conditions E nd H. Performnce Chrcteristics of Suv 407C in Existing HCFC-22 Designs At typicl ir-conditioner nd het pump conditions, Suv 407C performs comprly to HCFC-22 in existing positive displcement, direct expnsion equipment. Tle 2 summrizes the ctul performnce of Suv 407C versus HCFC-22 (cooling nd heting modes) in different units designed for HCFC-22. The units were not modified or optimized for performnce with Suv 407C. Deprtment of Energy (DOE) stndrd test conditions for cooling (test conditions A nd B) nd heting (test conditions E nd H) were used for this comprison. These results show tht Suv 407C is n lterntive for HCFC-22 tht cn e used not only in new equipment ut lso to service existing HCFC-22 equipment. Due to the increse in dischrge pressure, it will e necessry to contct the originl equipment mnufcturer to determine if dischrge pressure controls will need to e djusted to compenste for the higher dischrge pressure of Suv 407C. Even etter performnce will e chieved when modifictions to het pump nd ir-conditioning equipment re mde to optimize it for use with Suv 407C. Performnce Chrcteristics of Suv 410A versus HCFC-22 Tle 3 shows the results of comprison testing etween Suv 410A nd HCFC-22 in system designed for optimum performnce with HCFC-22. With the two modifictions of compressor chnge nd n djustle expnsion vlve, efficiencies of Suv 410A were out the sme s those of HCFC-22. This suggests tht system designed specificlly for Suv 410A my give etter efficiencies thn the results indicted in Tle 3. Suv 410A is eing positioned y mnufcturers s replcement for HCFC-22 in residentil ir conditioners nd het pumps ecuse of opportunities for improved efficiency versus HCFC-22 nd Suv 407C. Becuse of the higher operting pressures of Suv 410A, its ppliction will e in new equipment designed specificlly for this new refrigernt. 2

3 Tle 3 Performnce of Suv 410A Reltive to HCFC-22 in Unmodified Air Conditioners nd Het Pumps Rnge of Performnce: Cooling Mode Reltive Energy Efficiency Rtio (EER), % 2 to +2 Chnge in Dischrge Temperture, 5 to 6 C ( F) Temperture ( 9 to 11) r to kp to psi +131 to +150 Rnge of Performnce: Heting Mode Reltive Energy Efficiency Rtio (EER), % +1 to +4 c Chnge in Dischrge Temperture, 8 ( 14 c ) C ( F) r to kp to psi +106 to +131 c Vlues compred with HCFC-22 in split system het pump with cpcity-mtched compressor using the DOE cooling test conditions A nd B. Vlues compred with HCFC-22 in split system het pump with cpcity-mtched compressor using the DOE heting test conditions E nd H. c Vlues sed on 48/52 lend versus 50/50 lend currently in production. Influence of Lek/Rechrge on Performnce Suv 407C Rechrging fter lek of Suv 407C results in miniml impct on system performnce, even under worst-cse, multiple-lek/rechrge scenrios. If there is Suv 407C lek from n operting unit in two-phse region where mixing occurs (het exchngers or fter expnsion device), oth vpor nd liquid will lek from the unit. The composition of the refrigernt left in the system will remin essentilly unchnged from the originl composition. After rechrging Suv 407C to the system to get ck to the originl chrge size, the performnce of the unit will e the sme s its originl performnce with Suv 407C. However, if the unit is not operting nd there is vpor lek from sttic two-phse region, the composition of the refrigernt tht remins in the unit will chnge. The refrigernt remining in the unit will e more concentrted in the high oiling component (HFC-134) nd less concentrted in the lower oiling components (HFC-32 nd HFC-125). The effect of this composition shift on the performnce of Suv 407C is summrized in Tle 4. These dt summrize the oserved performnce of Suv 407C for multiple rechrges of the system fter 50 wt% of the refrigernt chrge is lost through vpor lek ove two-phse region. Three importnt oservtions from the dt generted in this lek/rechrge study re: During vpor lek, the HFC-32 (which is the flmmle component in the mixture) remining in the system decreses with concentrtion. The dischrge temperture nd pressure moved in fvorle direction during the vpor lek/ rechrge scenrio. The cpcity loss is limited to 5% s the performnce of Suv 407C levels out fter four 50 wt% lek/rechrge scenrios. The efficiency loss is limited to 2-3% under these lek/rechrge conditions. 3

4 Tle 4 Actul Unit Performnce After 50 wt% Vpor Leks nd Rechrges of Suv 407C Compressor Dischrge Rechrge No. Rel. COP,% Rel. CAP,% Temperture, C ( F) Pressure, r, kp (psig) (178) 21.4, 2142 (296) (176) 21.0, 2103 (290) (177) 20.8, 2080 (287) (176) 20.3, 2029 (280) (174) 20.4, 2044 (282) Coefficient of Performnce (mesure of energy efficiency) reltive to the Coefficient of Performnce of the originl chrge of Suv 407C. Refrigernt cooling cpcity reltive to the cpcity of the originl chrge of Suv 407C. Suv 410A This refrigernt hs even less tendency to seprte during lekge thn Suv 407C. Tle 5 shows the effect of repeted loss of 50% of the refrigernt chrge followed y ddition of enough new Suv 410A to restore the nominl mount of chrge. After repeted lekge nd rechrge, the effect on system performnce is negligile, with slight increse in HFC-125 composition tht cuses the resulting lend to move further into the nonflmmle region. Chrging Unit with Suv 407C or Suv 410A As with ny other refrigernt lend, when chrging equipment with Suv 407C, remove liquid refrigernt from the cylinder nd then chrge this to the unit. Cylinders of Suv 407C nd Suv 410A re equipped with liquid nd vpor vlves. The liquid vlve is ttched to dip-tue tht extends to the ottom of the cylinder, so liquid refrigernt cn e removed from the cylinder s it is stnding upright. 4

5 Tle 5 Theoreticl Unit Performnce After 50 wt% Vpor Leks nd Rechrges of Suv 410A Compressor Dischrge Rechrge No. Rel. COP,% Rel. CAP,% Temperture, C ( F) Pressure, r, kp (psig) (191) 28.1, 2814 (393) (190) 28.1, 2810 (393) (190) 28.1, 2808 (393) (190) 28.1, 2807 (392) (190) 28.1, 2807 (392) Coefficient of Performnce (mesure of energy efficiency) reltive to the Coefficient of Performnce of the originl chrge of Suv 410A. Refrigernt cooling cpcity reltive to the cpcity of the originl chrge of Suv 410A. Luricnts Evlutions of luricnts for use with Suv 407C nd Suv 410A re currently eing conducted. Becuse Suv 407C nd Suv 410A re lends of HFC refrigernts, for most pplictions, luricnt other thn minerl oil will e required. Polyol ester luricnts re eing studied for use with Suv 407C nd Suv 410A, s well s other HFC refrigernts. You should discuss specific luricnt recommendtions with your compressor mnufcturer. Avilility Suv 407C nd Suv 410A re ville to originl equipment mnufcturers nd through DuPont uthorized distriutors. Cll (800) 235-SUVA for the nme of the nerest DuPont uthorized distriutor. Summry Suv 407C nd Suv 410A offer respectively equivlent-performnce nd higher-cpcity lterntives to HCFC-22. Both new refrigernts re nonflmmle, hve the sme low order of toxicity tht HCFC-22 hs, nd yield similr energy efficiency nd refrigertion cpcity under typicl ir-conditioner nd het pump conditions. DuPont elieves these will e the preferred refrigernts to replce HCFC-22 in new equipment nd tht Suv 407C will e the preferred refrigernt in servicing of existing HCFC-22 systems. 5

6 For Further Informtion: DuPont Fluorochemicls Wilmington, DE (800) 235-SUVA Europe DuPont de Nemours Interntionl S.A. 2 Chemin du Pvillon P.O. Box 50 CH-1218 Le Grnd-Sconnex Genev, Switzerlnd Cnd DuPont Cnd, Inc. P.O. Box 2200, Streetsville Mississug, Ontrio Cnd L5M 2H3 (905) Mexico DuPont, S.A. de C.V. Homero 206 Col. Chpultepec Morles C.P Mexico, D.F South Americ DuPont do Brsil S.A. Almed Itpecuru, 506 Alphville Brueri São Pulo, Brzil DuPont Argentin S.A. Csill Correo 1888 Correo Centrl 1000 Buenos Aires, Argentin Pcific DuPont Austrli P.O. Box 930 North Sydney, NSW 2060 Austrli Jpn Mitsui DuPont Fluorochemicls Co., Ltd. Chiyod Honsh Bldg. 5-18, 1-Chome Srugkucho Chiyod-Ku, Tokyo Jpn Asi DuPont Tiwn P.O. Box Tipei, Tiwn DuPont Chin Limited P.O. Box TST New World Office Bldg. (Est Wing) Tsim Sh Tsui Kowloon, Hong Kong Phone: Fx: DuPont Thilnd Ltd Floor, Yd Bldg. 56 Silom Rod Suriywongse, Bnkrk Bngkok Phone: Fx: DuPont Chin Ltd. Rm. 1704, Union Bldg. 100 Yenn Rd. Est Shnghi, PR Chin Phone: Telex: DCLSH CN Fx: DuPont Fr Est Inc. 6th Floor Bngunn Smudr No. 1 JLN. Kontrktor U1/14, SEK U1 Hicom-Glenmrie Industril Prk Shh Alm, Selngor Mlysi Phone DuPont Kore Inc. 4/5th Floor, Asi Tower #726, Yeoksm-dong, Kngnm-ku Seoul, , Kore DuPont Singpore Pte. Ltd. 1 Mritime Squre #07 01 World Trde Centre Singpore DuPont Fr Est, Philippines 8th Floor, Solid Bnk Bldg. 777 Pseo de Roxs Mkti, Metro Mnil Philippines Phone: Fx: DuPont Fr Est Inc. 7A Murry s Gte Rod Alwrpet Mdrs, , Indi DuPont Fr Est Inc. Pkistn 9 Khyn-E-Shheen Defence Phse 5 Krchi, Pkistn DuPont Fr Est Inc. P.O. Box 2553/Jkt Jkrt 10001, Indonesi The informtion contined herein is sed on technicl dt nd tests which we elieve to e relile nd is intended for use y persons hving technicl skill, t their own discretion nd risk. Becuse conditions of use re outside of DuPont control, we cn ssume no liility for results otined or dmges incurred through the ppliction of the dt presented. (6/00) C Printed in U.S.A. [Replces: H ] Reorder No.: H Suv Only y DuPont