WARM UP #7A: CLIMATE


OBJECTIVES: In this warm up you will:

Learn about Energy Scheming:

Learn about energy:

Learn about architectural design implications:

PROCEDURE:
1) Transfer (download) a copy of the Warm up 7A file to your desktop.

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




3) Open the file Warm up 7A. This building file contains a variation of the Four Room House file you used in Warm up 6. The climate has been set to Madison, the building type to residential, and the building size to 1200 sf. The Preferences have been set and the infiltration turned off. The file contains a full set of specs for the entire building.

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

5) Save the file as "(name) Mad N-S".

6) Take a few minutes to become familiar with all the specs and takeoffs and schedules for this building.

7) Calculate and print out the Total Net flow and By Element Group graphs. Save.






Question

Please answer the following questions:
(More than one answer may be correct).


16) Strategies for improving the building performance in March and December include:

Increase insulation for wall, roof and floor.
Decrease the minimum thermostat setting to 60 F from 10 pm to 5 am.
Switch the strategies so that Loss to Mass is at the bottom of the list.
Increase the south window area to increase solar gain during the day.


17) Strategies for improving the building performance in June and September include:

Increase insulation for wall, roof and floor.
Increase the maximum thermostat setting to 83 F from 10 pm to 5 am.
Switch the strategies so that Loss to Mass is at the top of the list.
Decrease the south window area to decrease solar gain during the day.



18) Save the "Mad N-S" building file as "(name) Mad E-W".




19) Orientation is a key factor of energy performance. We will rotate the building in order to test performance with a different orientation. Click once on the south elevation icon. Now choose Review Drawing Info from the View menu. If the building is rotated 90 counterclockwise, the south elevation becomes the east.




20) Change the orientation and then change the elevation's name to "E Elev". close the drawing spec and repeat the process for each of the other three drawing icons as illustrated. South becomes east, east becomes north, north becomes west, and west becomes south. Relabel the elevations in the Draw mode (use the text tool or use the marquee tool to move the existing labels.

21) Calculate and print the title page, and Net flow and By Element Group graphs.






Question


Please answer the following questions using the graphic reports:
(More than one answer may be correct).

20) How did the performance of the east-west orientation (second file) differ from the north-south orientation?

Solar gain peak decreased and shifted towards noon in June and September.
Solar gain increased slightly in March and December.
The peak of the heat gain through roof for June and September shifts towards noon.
Electric lighting increased in March and December.



21) Save the file.

22) Save the "Mad E-W" building file as "(name) Mad E-W Optimized".




23) We will change several things in order to optimize the performance. Now that the orientation is changed, the first thing we should do is redistribute the glazing. Use the ROT to add glazing to the south elevation until it is at 100% of its target.




24) Check the Ventilation Parameters for the ROT. Note that the assumption is that the prevailing window is from the north. Therefore we can size the window for cross venting using the ROT. Add glazing on the north until you've reached 100% of the cross vent inlet target.




25) There is a large conduction loss through the windows. Add night insulation to all windows by adding insulating shades on the inside.




26) Click on Detailed Window Design to check the value of night insulation.

27) Let's add stack ventilation to see if we can get some ventilation for the hours in June when there is a net gain. Open the specifications for each of the lower windows in the south elevation. Click on the stack vent icon near the top of the window. A warning dialogue will come up reminding you to place elevation marks consistently in each elevation that has stack venting windows. Click OK. The cursor when over the drawing will be a elevation mark. In this case we will place the mark at the ground floor level of the south elevation.

28) Click on the Inlet radio button next to the stack vent icon in the spec window, then close the spec.

29) Open the spec for the dormer window. Click on the stack vent icon, then click on the Outlet radio button. Close the spec. Note that this time you are not asked to set the elevation mark. This is because you have already set it for this elevation.

30) Finally, let's use a set back thermostat. Set the maximum allowable temperature in June and September to 83 when the building is unoccupied, and set the minimum allowable temperature in March and December to 60 when the building is unoccupied and when the occupants are asleep (from 10 pm to 5 am).

30) Calculate and print the Net Flow and By Element Group graphs.

Question


Please answer the following questions using the graphic reports:
(More than one answer may be correct).


31) How did the performance of the optimized building change from the east-west orientation (second file)?

Shading and mass strategies allow for greater cooling in June.
Solar gain increased in March and December.
Stack ventilation allows cooling when there is no wind.
Excessive heat gain in March and December.


32) The performance of the optimized building file would be further improved by:

Loss to mass was at the top of the list for September.
March clear and December clear were the analyzed days.
June cloudy and September cloudy were the analyzed days.
Shades were scheduled off for June and September clear.









32) Click here if you would like to see the correct answers.

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Exercise #7A

Cool Down #7A

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