An International Standard Equation of State for Difluoromethane (R-32) for Temperatures from the Triple Point at 136. 34 K to 435 K and Pressures up to 70 Mpa

By Tillner-Roth, Reiner

Book Id: WPLBN0000661565
Format Type: PDF eBook:
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Reproduction Date: 2005

Title:	An International Standard Equation of State for Difluoromethane (R-32) for Temperatures from the Triple Point at 136. 34 K to 435 K and Pressures up to 70 Mpa
Author:	Tillner-Roth, Reiner
Volume:
Language:	English
Subject:	Technology., Reference materials, Technology and literature
Collections:	Techonology eBook Collection
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Citation APA MLA Chicago Tillner Roth, B. R. (n.d.). An International Standard Equation of State for Difluoromethane (R-32) for Temperatures from the Triple Point at 136. 34 K to 435 K and Pressures up to 70 Mpa. Retrieved from http://www.gutenberg.us/

Description
Technical Reference Publication

Excerpt
Introduction: R-31 is a non-ozone-depleting and environmentally acceptable refrigerant. It is an important compound in various HFC mixtures which will replace R-72 and R-502 (a mixture of R-22 and R- 115) in low-temperature refrigeration, air conditioning, and heat pump applications. The development of accurate equations of state for binary and ternary HFC blends requires accurate information of the pure components. Thus a precise formulation of the thermodynamic properties of R-32 is a first important step towards the development of an accurate equation or stares for the refrigerant mixtures. In this respect the establishment of an international standard for the thermodynamic properties of the pure HFC refrigerants is very desirable as it provides an excellent starting point for a reliable formulation for the mixtures.

Table of Contents
Contents I. Introduction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. Data Survey. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1. Criricul and Triplc Point.. . . . . . . . . . . . . . . . . 2.2. Single Phase Properties. . . . . . . . . . . . . . . . . . . 2.3. Saturarion Proprrtich. . . . . . . . . . . . . . . . . . . . . 2.4. Selectio~o~f Experilnental Data. . . . . . . . . . . . 3. Ideal Gas Propertie,.. . . . . . . . . . . . . . . . . . . . . . . . -1. The Fund:imental Equ~tion of State. . . . . . . . . . . . 4. I . The Helrnholr~ Fret Energy for the Ideal (;;I\ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7. Thc Rc.\idual Part (11' ill' thc Dimenzionle5~ Hc.ln~holrik rc.c. Enc'rg~.. . . . . . . . . . . . . . . . . . 5 . D~\cr~\\ioinll' thc. Se\\ Equation 01' Srate. . . . . . . . 5,1 . \';ipor Pre,.~~rcL. ~ i iE~nlt h:~Ip) 111' \ . : ~ ~ O ~ I / ; I : I ( \ I.I .. . . . . . . . . . . . . . . . . . . . . . . 5.2. I)c.n,~t~t;.I\ S,~r~~r,:ri.o.~.l.. . . . . . . . . . . . . 5.3. Hc.21 C.~p;ici!ic.. .ir S;irur;1tii!11.. . . . . . . . . . . ?.A. IJr0p~rI~I1I1 '~lll c. Ll~llllilP tl;l\c'. . . . . . . . . . . . . ?.?. P i . c ~ j ~ ~111l t~il~t ~\ ' ,iI ~\O I . Phaw. . . . . . . . . . . 5 (1 Bc.lic~Il\l r I)trr\c.J Pr-c\l~c.rtlc..\.. . . . . . . . 0. 1 1 1 l 1 1 l 1 . . . . . . . . . . . . . . . . . . . . . . - . .\ik11<1\\I c<lg~ll~'~.l!.,.. . . . . . . . . . . . . . . . . 1282 I I1S4 , -. 12x4 l2S? ; . . 1 ?St> 12ss 4. I 2 st; I'SS , . . h Appendix A: The Helmholtz Free Energy Equation of State of Difluoromethane tR-32) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1185 A. I . Derivatives of the Fundamental Equation of State. . . . . . . . . . . . . . . . .. . 1290 A.2. Ancillary Equations. . . . . . . . . . . . . . . . . I200 Appendix B: Deviation Statistics of Available Experimental Data. . . . . . . . . . . . . . . . . . . . . . . . . . 1290 Appendix C: Thcrn~odynamic Property Tables of Difluoromethane (R-32 1. . . . . . . . . . . . . . . . . . . . 179.7 Rct'erences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132s List of Tables Critical p:~rclnncter.; of' K-31. . . . . . . . . . . . . . . . . . . ! 270 Surnrliaq of rnea~urcmtnts in the \~nglc.-pll;:\c. I-cg!on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1277 Suiiim;~r!. of mt.,l\llrcnic.n1\ o!' \ , ~ r i ~ i - ~ ~ t i n n proper-t~esir l the t\r.o-ph,~\It. ~:_'IoII.. . . . . . . . . . . . 127s Funil,lnlc.ntal freqi~enc.ic.\a ilol~:c.cl[ 'or I<-32 ((in . I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1780 \.ihr;itrclnal anharnlonicit! ci)n\t;lnt\ ~c,nl . I . . . . . . I280 lc~oiln ~t;111i{i1>1 J ~ I I ~ ; I ~ I I ) I I~- \I ~-;I[IIIII L ~ ~ I I \ L X I I Li x\ 1Hl.1. . . . . . . . . . . . . . . . . . . . . . . . . . . I Ii50