(HP-67) Design Calculations for Passive Solar Buildings

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An excerpt from Design Calculations for Passive Solar Buildings by a programmable hand calculator, Lawrence Berkeley Laboratory - U of C - California, August 1979, 84 pages

        CONTENTS
 …
PROGRAM OPERATION
        HP-67 Program … … … 11
        TI-59 Program  … … … 19
 …
APPENDIX A: Listing of the … sub-programs
 …
                                             ABSTRACT
The behavior of room temperature in a passive solar building without
backup heat is of great interest to the building designer. This paper
presents programs for card-reading programmable hand-calculators which
compute room temperature over the course of a design day. Instructions
for calculating the input parameters, and for running the programs
are given, and a brief review of the theory is provided. The program
can presently be used only for single-zone unmanaged, direct-gain
buildings.
 …
This paper presents a hand-calculator program which can be used to predict
the floating temperature of a building, given a few simple building parameters
and weather data. The calculations describe the building's response to
a design day -- that is, a day with idealized {sinusoidal) weather. Two
versions of the program are given; one for a Hewlett-Packard HP-67 calculator
and the other for a Texas Instruments TI-59. Listings of the program are
given in Appendix A.

The programs described here can be run in less than one-half hour; in some
cases (e.g., those in which a few parameters are varied from an initial
design), the run-time is considerably less. The methodology used in the
programs can be generalized beyond the level of detail available in the
programs. Some of these extensions can be done as hand calculations using
intermediate outputs of the programs.

Use of this program will allow the building designer to easily predict
the floating performance of a proposed single-zone, unmanaged passive
solar building. The effect on floating temperature of varying parameters
such as properties of the thermal mass and area of windows can be seen
and, thus, optimal values can be chosen for such parameters. …

The theoretical basis of the programs is described in Appendix B, and de-
tailed derivations can be found in Ref. 1. Some familiarity with the theory
will be helpful to the user of the programs, as it will assist in evaluating
the input parameters to the program.
 …
PROGRAM OPERATION
This section describes the operation of the program from the point of
view of the user. It assumes that the user has already evaluated all the
building and weather parameters. A more detailed description of the HP-
67 and TI-59 programs is given in Appendix C. A listing of the programs
will be found in Appendix A. The HP-67 program and the TI-59 program are
different in structure, so they are described separately below. The
instructions must be followed exactlyto assure correct output.
To check the performance of the programs and the selection of input para-
meters, a sample problem is set up and solved in Appendix E.
 …

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