دانلود رایگان Refrigerant Line Sizing ASHRAERP185

Refrigerant Line Sizing
Prepared by
Daniel D. Wile
For the
American Society of Heating, Refrigerating
and Air-Conditioning Engineers, Inc.
As
ASHRAERP185
Under the Guidance of
ASHRAETechnical Committee 8.9, Refrigerant Piping
Copyright 1977
By the
American Society of Heating, Refrigerating
and Air-Conditioning Engineers, Inc.
345 East 47th Street, New York, NY 10017
The views of the author do not purport to reflect the
position of the Society, nor does their publication imply
any recommendation or endorsement thereof by the
Society.

Table of Contents

Page
Preface 1

R-12
Table 1-12 Flow Rate perTon 3
Chart 1-12 Suction Lines, Pressure and Temperature Losses in Steel Pipe 4
Chart 2-12 Discharge Lines, Pressure and Temperature Losses in Steel Pipe 5
Chart 3-12 Liquid Lines, Pressure Loss in Steel Pipe 6
Chart 4-12 Suction Lines, Pressure and Temperature Losses in Copper Tubing 7
Chart 5-12 Discharge Lines, Pressure and Temperature Losses in Copper Tubing 8
Chart 6-12 Liquid Lines, Pressure Loss in Copper Tubing 9
Chart 7-12 Liquid Lines, Pressure Loss from Increase in Height 10
Chart8-12 Gage Pressure at Various Altitudes 10

R-22
Table 1-22 Flow Rate per Ton 11
Chart 1-22 Suction Lines, Pressure and Temperature Losses in Steel Pipe 12
Chart 2-22 Discharge Lines, Pressure and Temperature Losses in Steel Pipe 13
Chart 3-22 Liquid Lines, Pressure Loss in Steel Pipe 14
Chart 4-22 Suction Lines, Pressure and Temperature Losses in Copper Tubing 15
Chart 5-22 Discharge Lines, Pressure and Temperature Losses in CopperTubing 16
Chart 6-22 Liquid Lines, Pressure Loss in CopperTubing ." 17
Chart 7-22 Liquid Lines, Pressure Loss from Increase in Height 18
Chart 8-22 Gage Pressure at Various Altitudes 18

R-502
Table 1-502 Flow Rate per Ton 19-
Chart 1-502 Suction Lines, Pressure and Temperature Losses in Steel Pipe 20
Chart 2-502 Discharge Lines, Pressure and Temperature Losses in Steel Pipe 21
Chart 3-502 Liquid Lines, Pressure Loss in Steel Pipe 22
Chart 4-502 Suction Lines, Pressure and Temperature Losses in Copper Tubing 23
Chart 5-502 Discharge Lines, Pressure and Temperature Losses in CopperTubing 24
Chart 6-502 Liquid Lines, Pressure Loss in CopperTubing 25
Chart 7-502 Liquid Lines, Pressure Loss from Increase in Height 26
Chart 8-502 Gage Pressure at Various Altitudes ..- 26

R-717
Table 1-717 Flow Rate per Ton 27
Chart 1-717 Suction Lines, Pressure and Temperature Losses in Steel Pipe 28
Chart 2-717 Discharge Lines, Pressure and Temperature Losses in Steel Pipe 29
Chart 3-717 Liquid Lines, Pressure Loss in Steel Pipe 30
Chart 7-717 Liquid Lines, Pressure Loss from Increase in Height 31
Chart 8-717 Gage Pressure at Various Altitudes 31

Tables Page
Table 1 Flow Rate per Ton (Included in Each Refrigerant Section)
Table 2 Correction Factors for Superheat Temperatures Other Than Used as Basis
forChartSeries1,2,4and5 33
Table 3 Corrections to Pressure Loss for Pipe Schedules Other Than Shown on
Chart Series 1,2 and 3 33
Table 4 Corrections to Pressure Loss for Copper Tube Types Other Than Shown
on Chart Series 4,5 and 6 33
Table 5 Condenser to Receiver Line Sizing 34
Table 6 Loss in Equivalent Length of Steel Pipe for Screwed, Flanged and
Welded Fittings 35
Table 7 Valve Losses in Equivalent Feet of Pipe.. .• 36
Table 8 Special Fittings Losses 37
Table 9 Corrections for Ball and Butterfly Valves 37
Table 10 Equivalent Length in Feet of Tubing for Forged Copper Fittings Used
with Type L or K Tubing 37
Examples 39
Appendixes
Appendix A Nomenclature 41
Appendix B Basis of Pressure Loss Charts 41
Appendix C Effect of Pipe Schedules and Tube Types on Pressure Losses in
Straight Pipe 41
Appendix D Effect of Pipe Schedules or Tube Types on the Equivalent Length
of Valves and Fittings 41
Appendix E Effect of Superheat on Pressure Loss 41
Appendix F Conversion of Cv to Le 42
Appendix G Effect on Viscosity on Pressure Loss 42
References 43
Acknowledgements 43