The Museum of HP Calculators

Heat Exchangers Parallel Counter Flow Subroutine for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HVAC Solution Book. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "ACON"
 02 XEQ 12
 03 2
 04 *
 05 RCL 12
 06 2
 07 RCL 10
 08 /
 09 +
 10 RCL 08
 11 -
 12 /
 13 CHS
 14 1
 15 +
 16 LN
 17 RCL 12
 18 /
 19 CHS
 20 RCL 07
 21 /
 22 LASTX
 23 X^2
 24 *
 25 RTN
 26 LBL "ECON"
 27 XEQ 12
 28 RCL 11
 29 RCL 07
 30 /
 31 RCL 12
 32 *
 33 CHS
 34 E^X
 35 1
 36 X<>Y
 37 +
 38 1
 39 LASTX
 40 -
 41 /
 42 RCL 12
 43 *
 44 RCL 08
 45 +
 46 2
 47 X<>Y
 48 /
 49 RTN
 50 LBL 12
 51 RCL 09
 52 1
 53 +
 54 STO 08
 55 RCL 09
 56 X^2
 57 1
 58 +
 59 SQRT
 60 STO 12
 61 RTN
 62 END

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