1-HVAC Load Explorer V1

7/23/2019 1-HVAC Load Explorer V1

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HVAC Load Explorer V1.0

htt ://www.mae.okstate.edu/hvac/

Dr. Ahmed Farouk Elsafty

Mechanical and Marine Eng. Dept.College of Engineering and Technology

Arab Academy for Science, Technology

and Maritime Transport

Email: [email protected]


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Weather data (explain selection and non-July)

Zoning (rooms)

Geometric description (inside dimensions or outside dimensions? Also simplification.)

a er a proper es nc u e ra a ve proper es

Describing walls and roofs.

Describing stud walls.

.

Describing windows Describing doors

Internal heat gains (levels and schedules)

escr ng erma mass

Infiltration and Ventilation

Specifying system parameters

Practical thin s about ro ram wh does it do backu instead of save? How to etoutput. Download latest version from website.

Heating Load Calculations

Check end of chapter for other items?


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* Windows 95 -

faster

*

* Hard drive with at least 30MB free space

* SVGA monitor, 800 x 600

* Windows-compatible mouse or pointing device

* CD-ROM drive* Adobe Acrobat(tm) Reader 3 (Adobe Acrobat Reader 4.0

included on CD)


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This software uses the heat balance

methods

Developed under ASHRAE Research

,loads in building.

The heat balance method is the most

available.


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surfaces, interior zone surfaces, and zone

. Assures conservation of energy (which is

not guaranteed for approximate methods).


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LW Long WaveSW Short Wave


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. ,

close all applications.

Insert the CD-ROM in our CD-ROM drive In Windows Explorer, locate the CD-ROM drive and go

into the directory containing the program that you wish to.

Double-click on the file "Setup.exe". Follow the instructions in the installer. (This may require

re- oot ng your computer.

If you do not have Adobe Acrobat, use the Windows-

click on the file "ar40eng.exe" and follow the instructions.

Restart your computer.


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Unfortunately, the program will not RUN

!!!!

ou nee o ge some es o so ve sproblem


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- -

Load Calculations Seminar(New 10-17-03)

. . , ,

If you have installed the software from the CD, and have not previouslydownloaded any of the software, you will need to download the files listedbelow. You should right-click on each file name and choose "Save Target

s n croso xp orer or ave n s n e scape , en save e

file in a temporary directory. When all files have been downloaded, youshould copy the files into the specified directories. (Most will go into theHVACLoadExplorer directory; TimeZone.txt must be copied into the textfiles

rectory, un er your ma n oa xp orer rectory.temp ate.m mustbe copied into the Database directory, under your main HVACLoadExplorerdirectory.)

If you have already downloaded a previous version from this website, youshould check the dates on the files below. Any files listed below that arenewer than the files on your hard drive should be downloaded.


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DirectoryDateFile Name

HVAC Load Explorer(New 10-29-03)HvacLoadExplorer.exe

HVAC Load Explorer(New 10-29-03)HVACLOADEXPLORE

R.HLP

- -.

HVAC Load Explorer(New 2-21-03)HBFORT15.dll

HVAC Load Explorer(New 6-1-00)DFORRT.DLL

HVAC Load

Ex lorer\textfiles(New 12-1-00)TimeZone.txt

HVAC Load

Explorer\database(New 4-28-03)template.mdb

ew - -en um.p


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- - ,mschrt20.ocx.

Solution : .

to download the file, and then store it in the following directory,depending on your operating system:

Windows 95/98 - C:\WINDOWS\systemWindows NT/2000 - C:\WINNT\system32Windows Me - C:\WinMe\S stemWindows Xp - C:\WINDOWS\system32

To download the file ri ht-click on the link above and choose "SaveTarget As" (in Microsoft Explorer) or "Save Link As" (in Netscape)


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s e can e use o ca cu a e e

conduction transfer function coefficientsfor Example 8-1: Example 8-1.mdb

The 9 room Chica o office buildin see

Load Calculations Seminar) is here.

Bugs should be reported to Prof. J.D.. u


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Load Calculations

-


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ree ypes o es gn ays

Based on eak dr bulb tem erature:room loads.

,

evaporative coolers, ventilation

-control.

See 2001 ASHRAE Handbook ofFundamentals for further information.


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, .

Some rooms can have peak loads in other

mon s, even anuary. Exam le: South facin hotel rooms with

large windows may have peak loads in

.


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-

,does not let it go, thermal mass stabilizes againstlarge fluctuations overhang defeats mechanism for summer months


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Zoning/Rooms

In HVAC Load Explorer terminology:

temperatures, loading, and controls. n arge u ngs, may e es ra e o com nemultiple rooms into a single room description.

.

Zone: provided in HVAC Load Explorer for

conven ence; s a way o a ng up oa s or a

group of rooms. (e.g. All rooms served by a

s ng e a r an er


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Outside or Inside?

,doesnt make that much difference.

ns e mens ons may s g yunderestimate load.

Outside dimensions may slightly

.

Simplify geometry when possible.


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Described layer by layer from the outside in.

Material properties for each layer (k, , cp) fromMPS 127-132

important for inside and outside layers.

balance method.

solar radiation purposes.


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Tilt is the angle made by the wall with the

horizontal in de rees. Default is 90o.

o

Elevation


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ac ng rec on s e ang e ma e y

the normal vector of wall with the, ,degrees.

EW

.

East facing wall will have facing directionof 90,

S

South facing wall will have facing directionof 180.

West facing direction will have facingdirection 270.


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oo e au s .

Roof 0

.

Floor 180


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mportant

TOS: normal outside

conditions

TA: conditioned space on

other side

: groun temperature on

other side

TSS: outside tem erature

but no sun

TB: special, user-defined

other side.


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Represents interior furnishings, interior

artitions not elsewhere described. Necessarily approximate.

as wo e ec s: Thermal storage (slows room response)

Radiative/convective exchange (speeds room


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1-HVAC Load Explorer V1

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