MIDTERM EXAM

You should have completed exercises 1-7 before doing this midterm exam



PROCEDURE:

1) Transfer (download) a copy of a new climate file called My First Climate.txt for use in this midterm exam to your desktop.

2) Transfer (download) a copy of the Good Times file to your desktop.

3) Resize the internet browser window to a 2" wide narrow strip on the right hand side of the monitor.

4) Open the file Good Times. This building file contains an office building. The file contains a full set of specs for the entire building.

5) Arrange the Energy Scheming and internet browser windows so you can see them both.

6) Run the calculations and then print out the Energy Performance Report to a PDF file or to Preview. You can find the Energy Performance Report item in the File menu. There are about 75 pages in this report.

In this exam, please do the following:
You may use the Advisor for the redesign, but not for the analysis of problems and solutions.
Analyze the energy report and identify the problems for each day.
Identify the potential solutions for each day.
Redesign the Good Times building to improve its energy performance as much as possible. Good energy performance is considered to be balanced heat gains and losses (i.e., little to no total net heat flow) with the loads as small as possible (i.e., short bars in the graph), reducing the peak load and shifting the peak load from mid-afternoon, especially for those loads that correspond to manufactured energy, such as electricity for lights.

7) The following are assumptions we made in creating the Good Times building: a list of features you may not change in your redesign and a list of features you may change.

a) Assumptions to make in analyzing the Good Times building:
All exterior doors are treated as opaque wall surfaces.
Toilets, storage, etc, are located in an adjacent building
The roof is flat and follows the conditioned area of the floor plan.

b) Things that may not change in the redesign of the Good Times building:
Room A is three offices of 100 sf each separated by 5'0" movable acoustical partitions.
Room B is a 300 sf meeting room.
Room C is a 150 sf special purpose room
There is a total of 750 sf of conditioned space
Room D is an outside corridor with an opaque roof
Windows or skylights must be provided in rooms A, B, and C
There must be a separated lighting zone for each of rooms A,B, and C
The building must be occupied for 10 hours for each day
Occupant density and heat generated per person is:
Room A 1 person/sf, 250 BTU/h, person
Room B 14 people/sf, 250 BTU/h, person
Room C 1 person/sf, 250 BTU/h, person
Equipment 5 BTU/h, sf for rooms A, B, and C
Lighting levels for rooms A, B, and C 40 fc
There must be an acoustical separation between rooms A, B, and C
The occupied temperature range is min. = 65 F, max. = 78 F
Climate, building type, building size in project description
Occupant, lights and equipment on/present periods must coincide

c) Things that may be changed in the building redesign:
Room arrangement
Room orientations
Window size, placement, and number
Envelope construction
Schedules
Strategies
Infiltration
Lighting type
Anything else not expressly forbidden in section 7b, above.

8) Some things to remember:
If you want to change the orientation of a drawing (icon) that has been created, highlight a drawing icon and select Review Drawing Info. from the View menu.

You can turn takeoffs on and off by selecting Takeoffs from the View menu. Use the check boxes to display individual takeoffs. Remember you must have a drawing icon open and a spec open if that's what you have selected at the top of Make Takeoffs Visible dialog box.

Grading
You will earn one point for each correct answer . For each incorrect answer, one point will be deducted .

Username:

9) Identify the PROBLEMS for each day. Consider a "problem" to be a heating or cooling load and/or peak. The peak is defined as the maximum net flow (gain or loss) hour.

Day 1: High temp/low rad
a. gain from infiltration
b. loss from infiltration
c. gain through wall
d. loss through wall
e. gain through window via conduction
f. loss through window via conduction
g. gain through roof
h. loss through roof
i. gain through floor
j. loss through floor
k. no ventilation of mass at night
l. occupant and equipment loads coincide with high ambient temperature
m. excess solar gain
n. gain from electric light
o. gain from occupants
p. gain from equipment


Day 2: High temp/high rad
a. gain from infiltration
b. loss from infiltration
c. gain through wall
d. loss through wall
e. gain through window via conduction
f. loss through window via conduction
g. gain through roof
h. loss through roof
i. gain through floor
j. loss through floor
k. no ventilation of mass at night
l. occupant and equipment loads coincide with high ambient temperature
m. excess solar gain
n. not enough solar gain
o. gain from electric light
p. gain from occupants
q. gain from equipment


Day 3: Low temp/low rad
a. gain from infiltration
b. loss from infiltration
c. gain through wall
d. loss through wall
e. gain through window via conduction
f. loss through window via conduction
g. gain through roof
h. loss through roof
i. gain through floor
j. loss through floor
k. no ventilation of mass at night
l. occupant and equipment loads coincide with high ambient temperature
m. excess solar gain
n. gain from electric light
o. gain from occupants
p. gain from equipment


Day 4: Low temp/high rad
a. gain from infiltration
b. loss from infiltration
c. gain through wall
d. loss through wall
e. gain through window via conduction
f. loss through window via conduction
g. gain through roof
h. loss through roof
i. gain through floor
j. loss through floor
k. no ventilation of mass at night
l. occupant and equipment loads coincide with high ambient temperature
m. excess solar gain
n. not enough solar gain
o. gain from electric light
p. gain from occupants
q. gain from equipment


10) Identify the SOLUTIONS for each day. Consider a viable "solution" to be a strategy to reduce a heating or cooling load or peak.

Day 1: High temp/low rad
a. Add external shades on the elevations that face the north
b. Add external shades on the elevations that face the east
c. Add external shades on the elevations that face the south
d. Add external shades on the elevations that face the west
e. Cross ventilate
f. Stack ventilate
g. Use light colored roof
h. Use light colored wall
i. Use dark colored roof
j. Use dark colored wall
k. Add wall insulation
l. Reduce wall insulation
m. Add roof insulation
n. Reduce roof insulation
o. Add floor insulation
p. Reduce floor insulation
q. Increase window R-value
r. Decrease window R-value
s. Add mass to store heat to offset losses
t. Add mass to store coolth from night ventilation
u. Increase allowable maximum interior temperature (Timax) for unoccupied times
v. Decrease allowable minimum interior temperature (Timin) for unoccupied times
w. Increase Solar Heat Gain Coefficient (SHGC)
x. Decrease Solar Heat Gain Coefficient (SHGC)
y. Add night insulation to windows
z. Schedule occupants to avoid peaks
A. Schedule lights to avoid peaks
B. Use more efficient lights
C. Schedule equipment to avoid peaks
D. Decrease the window area
E. Decrease the envelope area
F. Use daylight to reduce electric lights
G. Increase south window area
H. Increase solar gain


Day 2: High temp/high rad
a. Add external shades on the elevations that face the north
b. Add external shades on the elevations that face the east
c. Add external shades on the elevations that face the south
d. Add external shades on the elevations that face the west
e. Cross ventilate
f. Stack ventilate
g. Use light colored roof
h. Use light colored wall
i. Use dark colored roof
j. Use dark colored wall
k. Add wall insulation
l. Reduce wall insulation
m. Add roof insulation
n. Reduce roof insulation
o. Add floor insulation
p. Reduce floor insulation
q. Increase window R-value
r. Decrease window R-value
s. Add mass to store heat to offset losses
t. Add mass to store coolth from night ventilation
u. Increase allowable maximum interior temperature (Timax) for unoccupied times
v. Decrease allowable minimum interior temperature (Timin) for unoccupied times
w. Increase Solar Heat Gain Coefficient (SHGC)
x. Decrease Solar Heat Gain Coefficient (SHGC)
y. Add night insulation to windows
z. Schedule occupants to avoid peaks
A. Schedule lights to avoid peaks
B. Use more efficient lights
C. Schedule equipment to avoid peaks
D. Decrease the envelope area
E. Use daylight to reduce electric lights
F. Increase south window area
G. Increase solar gain


Day 3: Low temp/low rad
a. Add external shades on the elevations that face the north
b. Add external shades on the elevations that face the east
c. Add external shades on the elevations that face the south
d. Add external shades on the elevations that face the west
e. Cross ventilate
f. Stack ventilate
g. Use light colored roof
h. Use light colored wall
i. Use dark colored roof
j. Use dark colored wall
k. Add wall insulation
l. Reduce wall insulation
m. Add roof insulation
n. Reduce roof insulation
o. Add floor insulation
p. Reduce floor insulation
q. Increase window R-value
r. Decrease window R-value
s. Add mass to store heat to offset losses
t. Add mass to store coolth from night ventilation
u. Increase allowable maximum interior temperature (Timax) for unoccupied times
v. Decrease allowable minimum interior temperature (Timin) for unoccupied times
w. Increase Solar Heat Gain Coefficient (SHGC)
x. Decrease Solar Heat Gain Coefficient (SHGC)
y. Add night insulation to windows
z. Schedule occupants to avoid peaks
A. Schedule lights to avoid peaks
B. Use more efficient lights
C. Schedule equipment to avoid peaks
D. Decrease the window area
E. Decrease the envelope area
F. Use daylight to reduce electric lights
G. Increase south window area
H. Increase solar gain


Day 4: Low temp/high rad
a. Add external shades on the elevations that face the north
b. Add external shades on the elevations that face the east
c. Add external shades on the elevations that face the south
d. Add external shades on the elevations that face the west
e. Cross ventilate
f. Stack ventilate
g. Use light colored roof
h. Use light colored wall
i. Use dark colored roof
j. Use dark colored wall
k. Add wall insulation
l. Reduce wall insulation
m. Add roof insulation
n. Reduce roof insulation
o. Add floor insulation
p. Reduce floor insulation
q. Increase window R-value
r. Decrease window R-value
s. Add mass to store coolth from night ventilation
t. Increase allowable maximum interior temperature (Timax) for unoccupied times
u. Decrease allowable minimum interior temperature (Timin) for unoccupied times
v. Increase Solar Heat Gain Coefficient (SHGC)
w. Decrease Solar Heat Gain Coefficient (SHGC)
x. Add night insulation to windows
y. Schedule occupants to avoid peaks
z. Schedule lights to avoid peaks
A. Use more efficient lights
B. Schedule equipment to avoid peaks
C. Decrease the envelope area
D. Use daylight to reduce electric lights
E. Increase south window area
F. Increase solar gain

11) Submit by clicking on the button below, then continue on to the redesign.

IMPORTANT: when you submit the questions for grading, a window will open telling if it was successfully graded or not. Make sure that the note says that it was graded! You will then return here to complete the second portion of the exam.



12) Redesign the Good Times building. Transfer (download) a copy of the Good Times Redesign file to your desktop. Save the Good Times building file as "(name) Good Times Redesign". Remember that a building with good energy performance will have short bars in the graphic report, and heat gains will equal heat losses. It is possible to redesign this building to completely remove total net heat flow for each day.

13)When you have completed redesigning your building, make sure you have saved your changes.

Also be sure to save your final redesign file on a disk as back up.

You may now want to enlarge this window so you can see more of the illustrations. Submit the file when you have finished by using the following steps:

14) Open window for sending e-mail

It will look like this:

 

15) Click on the paper clip icon named Attach at the top of the window. This will bring up a typical Macintosh window for locating your file. Select the (name) Good Times Redesign building which you have been working on (make sure that you have saved it with your final design changes.) Then click the Attach button:

 

16) This will put the name of your building file into the top scrollable area.

17) Type in "Midterm" for Subject. And type your name into the body of the e-mail message. When complete, your window should look like this:

18) Click the send icon at the top of the window to send your e-mail message with attached building file.

19) If sent properly, the window will close and you will return to this page.

20) Finally, enter your username, make comments if you like, and click the "Done with Midterm" button.

Username:

comments:

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