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 Title Page
 The authors
 Introduction
 Program operation






Title: Wood for energy
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Permanent Link: http://ufdc.ufl.edu/UF00028021/00001
 Material Information
Title: Wood for energy
Series Title: Florida Cooperative Extension Service Circular 637
Physical Description: Book
Language: English
Creator: Flinchum, Mitch
Dippon, Duane
Grissom, Jim
Affiliation: University of Florida -- Florida Cooperative Extension Service -- Institute of Food and Agricultural Sciences
Publisher: Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida,
Publication Date: 1980?
 Subjects
Spatial Coverage: North America -- United States of America -- Florida
 Notes
Funding: Florida Historical Agriculture and Rural Life
 Record Information
Bibliographic ID: UF00028021
Volume ID: VID00001
Source Institution: Marston Science Library, George A. Smathers Libraries, University of Florida
Holding Location: Florida Agricultural Experiment Station, Florida Cooperative Extension Service, Florida Department of Agriculture and Consumer Services, and the Engineering and Industrial Experiment Station; Institute for Food and Agricultural Services (IFAS), University of Florida
Rights Management: All rights reserved by the source institution and holding location.

Table of Contents
    Title Page
        Page 1
    The authors
        Page 2
    Introduction
        Page 3
        Page 4
    Program operation
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
        Page 12
Full Text

I "RESTRY INFORMATION SYSTEM I Circular 637
l Z-WOOD FOR ENERGY.
Milch Flin chum, Duane Dippon and Jim Grissom --'

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The Authors

Mitch Flinchum is Associate Professor, Duane Dippon is Assistant Professor and Jim
Grissom is a graduate student, School of Forest Resources and Conservation, IFAS,
University of Florida, Gainesville, 32611.












WOOD FOR ENERGY: FIREWOOD WORTH

INTRODUCTION

The FORINSY Firewood Worth program was adapted from a model developed by David A.
Delaski, Southeastern State and Private Forestry, U. S. Forest Service. The program
computes the highest price that a homeowner could pay per cord of wood for home heat
without exceeding the price currently paid for conventional gas, oil, or electrical
heat.

As with any comparison many assumptions have been made regarding efficiencies of
various heating systems and heating values of different species of wood fuel. These
assumptions, in turn, affect the final price figures. Be sure to study the values that
are assumed in the program and compare them with what you think are reasonable
estimates. This will give a better idea of how to more accurately interpret the final
value.

The operation and logic of this program are shown in Figure 1. The instructions
on how to use the program are included under the section Program Operation. The
material that appears on the terminal screen is highlighted.

Question or comments regarding the program should be directed to:

Mitch Flinchum Duane Dippon
(904) 392-5420 (904) 392-1850

School of Forest Resources and Conservation
118 Newins-Ziegler Hall
University of Florida
Gainesville, FL 32611

































3










PROGRAM
DESCRIPTION?
YES NO

D:ESC R I PT ION



INPUT SELECT TYPE OF
FUEL NOW IN USE



INPUT SELECT TYPE OF
HEATING SYSTEM



DEFINITIONS OF EFFICIENCY
HEATING SYSTEMS VALUES



SELECT RELATIVE
INPUT HEATING VALUE
OF WOOD



OUTPUT FIREWOOD EQUIVALENT
IN DOLLARS/CORD







Figure 1. Flow Chart for Wood for Energy Program



4












PROGRAM OPERATION



Signing on to the Computer

The program is designed for the VAX computing system manufactured by the Digital
Equipment Corporation (DEC) but is not limited to DEC equipment. A computer terminal
with telephone hookup (acoustic coupler) is required. If peripheral equipment such as
hard copy printer are used, then the signal transmission type between terminal and
printer must be compatible (serial or parallel).

Before using the terminal an account must be established with the Institute of
Food and Agricultural Sciences (IFAS) Extension Computer Network in Gainesville.

Use the following procedure to access the VAX computer:

1. Set the terminal to FULL DUPLEX.

2. Set the modem to FULL DUPLEX.

3. Dial (904) 392-5750 (for high-speed or 1200 baud terminals) or 392-5760 (for
low-speed or 300 baud terminals) to access the IFAS VAX computer.

4. When the "READY" light appears on the coupler, press the terminal's carriage
return (CR). The computer will respond "USERNAME" to which you will type
your User's name (usually 3 letters) and press (CR).

5. The computer will respond "PASSWORD" to which you will type your password and
press (CR).

6. When you see the message "WELCOME TO VAX/VMS..." you are signed on to the
IFAS VAX system successfully.

7. You should now see a "$" at the left margin of the bottom line on the
terminal screen or printer. To the right of the "$" is a blinking cursor
character. You now type "MENU" to access the IFAS Computer Network Menu
System.

8. The Forestry Information System (FORINSY) is listed as program #9 on the main
IFAS menu. After the instruction "PROGRAM NUMBER:" appears on your terminal
type in "9." The Wood for Energy program is one portion of FORINSY.

9. The computer responds to your selection by listing 5 options as illustrated
below to assist you with the program. You should type in "102" after the
prompt "PROGRAM OPTION" to execute the Forestry Information System. You will
be ready to select the Wood for Energy program after proceeding through the
preliminary menu.











5













The programs you can run are:

100) DONE Goes back to program name

101) HELP Prints this message

102) EXECUTE Run the program

103) ABSTRACT A short abstract will be typed

104) INSTRUCTIONS How to run the program

ENTER a CTRL/Y to go back to the main menu

Program option:



Preliminary Menu

The preliminary menu aids the School of Forest Resources and Conservation (SFRC)
in identifying the users of the programs. The preliminary menu is described by the
following:



Forestry Information System V1.L1.
(FORINSY)

Have you used FORINSY before?

1. -- First-time user.
2. -- Used FORINSY before.

Enter choice =



If you have used FORINSY before type "2" but if this is your first experience then
type "1" which will request the following information:



Forestry Information System (FORINSY)

Please introduce yourself by typing in the following information

LAST NAME:
FIRST NAME (OR INITIALS):
STREET (OR MAILING) ADDRESS:
CITY:
STATE:
ZIP CODE:












The user should supply the requested information on each line. By pressing (CR),
the computer moves to the next line until the "ZIP CODE" is supplied. The computer
then reprints your input along with the date and asks if everything is correct.



TODAY'S DATE

Is all information correct?

(1 = Yes 2 = No 3 = Exit):



The user chooses the appropriate response: "1" to continue processing, "2" to
retype the information correctly and "3" to exit the program. After successfully
supplying this information the user will be provided an explanation of why these facts
are collected after which the user will press (CR) to call up the main FORINSY menu.

The Main Menu Forestry Information System

The main menu offers a selection of different programs relating to forestry. The
following information will be displayed on the screen:



Forestry Information System V1.L1
(FORINSY)

Choose:

1. -- Exit.
2. -- Forestry Investment.
3. -- Volumes and Yields.
4. -- Products, Markets, and Prices.
5. -- Forestry Management Assistance.
6. -- Silvicultural Practices.
7. -- Wildlife Management.
8. -- Range Management.
9. -- Forest Pest Management.
10. -- Forest Water Management.
11. -- Identification of Pines.
12. -- Wood for Energy.

Enter choice =



The user must select an option by typing in the menu number of the desired program
followed by a carriage return. To begin the Wood for Energy program, enter the number
"12" and press carriage return (CR).












7












The following display is shown on the terminal:



FIREWOOD WORTH

Adapted from: David A. Delaski
U. S. Forest Service
Southeastern State & Private Forestry

Do you want a description of the program (Yes or No)?



If the user responds with a "YES" (this response is recommended for first time
users) the program description is displayed, after which the carriage return is pressed
and the questions to the user begin. A "NO" response by-passes the description and
goes to the questions.


Program author: James E. Grissom, SFRC, University of Florida



This program compares the worth (price) of firewood in dollars per cord to the
price of a current fuel (i.e., electricity, natural gas, LP (liquid propane) gas, or
fuel oil). It lists the equivalence of both green and seasoned wood. Green wood is
defined as wood cut less than 3 months before use, whereas seasoned wood must have been
cut, split, and stacked a minimum of 3-6 months before use.

The resulting cordwood prices reflect the most you could afford to pay for a cord
of wood with a given heating value, moisture content and burning efficiency, and still
be economical. Remember to include the acquisition costs (for delivery, chain saw
fuel, splitting wood, etc.) of the firewood and the convenience value of the other
fuels, when comparing prices.

To continue, press RETURN.




FIREWOOD WORTH CALCULATION

What kind of fuel are you now using?

1. Electricity
2. Natural Gas
3. LP Gas
4. Fuel Oil

Type in a number (or type 0 to leave the program): 1



What is your current fuel cost?
[typical range: 5-8 cents/kilowatt-hr]: 8






8












The user is instructed to type in the number that corresponds to the type of fuel
which is to be compared to the value of wood. This is the only place to exit the Wood
for Energy program, should the user decide, without completing the exercise. If "0" is
selected the program goes back to the main FORINSY menu. After typing in the number,
the user is asked to type in the current fuel cost. An example of how the fuel cost
should be entered follows the question.

After the current fuel cost is entered correctly the user is asked to specify
which type of wood-heating system is to be used in the calculation. A first-time user
may wish to enter number "4" to see the definitions of each type heating system, and
then, the number "5" to view the efficiency values that are assumed for each in the
calculation.

In this particular example, number 1 (electricity) was selected.



Type of heating system:

1. Fireplace
2. Box stove
3. Airtight stove

or you may view:

4. Definitions of each
5. Efficiency values assumed for each

Enter a number:


If the user enters the number "4" and presses the carriage return the following
definitions are displayed.



DEFINITIONS -

Fireplace: Conventional type with or without glass doors

Box stove: Franklin; parlor; fireplace with air circulation box or air
circulating grate

Airtight stove: Free-standing radiant; circulating heater;
fireplace insert; catalytic combustor

Enter a number:


The user may now enter the number "5" to view the efficiency values used in the
calculations (below) or by-pass the efficiency values by selecting a "1," "2," or "3"
which corresponds to the type of heating system for which the calculation will be
performed. In this particular example number 2 (Box stove) was selected.






9














Heating Efficiency value
System used in program



Fireplace 10.0%
Box stove 35.0%
Airtight stove 60.0%
Electricity 90.0%
Natural gas 77.8%
LP gas 78.7%
Fuel oil 82.5%



Since the heat values of different species of firewood vary, the user is asked to
select whether the wood they intend to burn has a low, medium, or high heating value.



Relative heating value of desired species:

1. Low
2. Medium
3. High

Enter a number, or enter 4 for categoric listing of relative heating
value by species.



If unsure about the heating values the user should enter the number "4" and press
carriage return to view the following:



FIREWOOD HEATING VALUE BY SPECIES:

HIGH MEDIUM LOW



Ashes Cherry,Black Baldcypress
Beech Elms Basswood
Blue-beech Hackberry Cedars
Dogwood Holly,Ameri can Cottonwood
Hickories Magnolia Sassafras
Ironwood Maple,red Sycamore
Maple,sugar Pines Willow,Black
Locust,black Sweetgum Yellow-poplar
Oaks Tupelo
Pecans Walnut
Persimmon

To continue, press RETURN








10












After pressing the carriage return the user will be asked to enter the number
(1, 2, or 3) that corresponds to the heating value of the species of wood that is used
in the heating system. In this example number 2 (medium) was used and the following
was displayed.

The following values reflect the most you could afford to pay for a cord of wood
with a given heating value, moisture content and burning efficiency, and still be
economical.



Firewood equivalent:

Green wood $ 330.73/cord
Seasoned wood $ 356.77/cord

Please press RETURN.



After pressing RETURN the program starts over.



FIREWOOD WORTH CALCULATION

What kind of fuel are you now using?

1. Electricity
2. Natural Gas
3. LP Gas
4. Fuel Oil

Type in a number (or type 0 to leave the program)



A "0" response will return the user to the main FORINSY menu. At this point, any
other program in FORINSY can be accessed or an exit can be accomplished by entering "1"
and pressing the carriage return.


























11












Forestry Information System V1.L1
(FORINSY)

Choose:

1. -- Exit.
2. -- Forestry Investment.
3. -- Volumes and Yields.
4. Products, Markets, and Prices.
5. -- Forestry Management Assistance.
6. -- Silvicultural Practices.
7. -- Wildlife Management.
8. -- Range Management.
9. -- Forest Pest Management.
10. -- Forest Water Management.
11. -- Identification of Pines.
12. -- Wood for Energy.

Enter choice =



If an exit is chosen by entering a "1," an exit from the FORINSY subsystem begins.
The exit is completed when the IFAS VAX computer system asks for a program number.
This number refers to the original VAX main menu seen earlier, which provided the
access to FORINSY and several other options. If no other option is desired, entering
"0" will cause the user to leave the main menu and go directly into the operating
system. This is signified by a "$" on the left side of the screen or page.



Program number:



$




The user can either go to other programs within the IFAS VAX operating system or
enter "Lo" to log off the host computer. At this point the signal is lost and the
equipment can be turned off.













COOPERATIVE EXTENSION SERVICE, UNIVERSITY OF FLORIDA, INSTITUTE OF FOOD AND AGRICULTURAL
SCIENCES, K. R. Tefertiller, director, In cooperation with the United States Department of Agriculture, publishes this Infor-
mation to further the purpose of the May 8 and June 30, 1914 Acts of Congress; and is authorized to provide research, educa- R PA
tional Information and other services only to individuals and Institutions that function without regard to race, color, sex or
national origin. Single copies of Extension publications (excluding 4-H and Youth publications) are available free to Florida
residents from County Extension Offices. Information on bulk rates or copies for out-of-state purchasers Is available from
C. M. Hlnton, Publications Distribution Center, IFAS Building 664, University of Florida, Gainesville, Florida 32611. Before publicizing this
publication, editors should contact this address to determine availability.




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