WARM UP #5: PEOPLE, EQUIPMENT, AND SCHEDULES


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 5A file to your desktop.

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




3) Open the file Warm up 5A. This building file contains a preliminary drawing of a community center. The climate has been set to Dodge City, Kansas, the building type to non-residential, and the building size at 3100 sf. The Preferences have been set and the infiltration turned off.

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

5) Save the file as "(name) Occup 1 Zone".




6) Create a plan specification, using the scale tool and the measurement on the drawing (90') to set the scale.




7) Create an occupant zone spec with activity level of Light work and density level 7 persons/100 sf. Takeoff the whole building, using the measuring tape tool for polygons (use the tool to trace around the edges, then double click to finish). Do not worry if the area does not exactly match the example shown.




8) Go to the graphic report and set the graphic scale to 5000 BTU and By element group and the climate to only calculate March clear. Calculate.

9) Print the schedule and the By element graph (or print to Preview file to save paper), and save building file.

10) Save the "(name) Occup 1 Zone" building file as "(name) Occup 3 Zones".




11) Open the occupant spec you created and delete its takeoff with the thumbs down tool. Change the occupant density to 1 person/100 sf. Now do another takeoff, this time tracing only the office areas.




12) Create another occupant spec set at Light Work and 14 persons/100 sf. Takeoff the auditorium.



13) Look at the sensible heat gain from 14 persons/100 sf performing Light work by clicking on the Detailed Occupancy Design button. It is set to 235.00 Btu/h,person. Close the window.


14) Create a third occupant spec set at Walking Slowly and 1 person/100 sf. Takeoff the remaining space. Note that after creating the takeoff, the number of people is displayed according to the area of the takeoff and the density specified.

15) Calculate and print the By element group graph. Save.

Question

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


16) Compare the bar graph from Occup 1 Zone with that from Occup 3 Zones. The difference between the two graphs is:

The graph from Occup 3 Zones shows less heat gain because the schedule of times of occupancy is different than Occup 1 Zone's schedule.
The graph from Occup 3 Zones shows less heat gain than the Occup 1 Zone file.
The graph from Occup 3 Zones shows greater heat gain because the building file has more zones.
The graph from Occup 3 Zones shows less heat gain because the building file has fewer people.



17) Save the "(name) Occup 3 Zones" building file as "(name) Occup & Equip".




18) Equipment may be specified by building type or by the actual pieces of equipment expected to be used in the building. Since we do not know at this early stage what the equipment is, we will specify equipment by building type. Create an equipment spec using the Office setting. Takeoff the offices. (Remember that one way to do the takeoff: with the New Equipment spec open, you can select the occupant takeoff of the offices with the arrow tool, then select Associate Takeoff with Open Spec from the Options menu. Be sure to change the pattern of the takeoff, and move the takeoff out of the way.)

19) Calculate and print the By element group graph. Save.




20) Use Thermographics to see which element has the most heat gain per square foot. After running the calculations, go to the Takeoff Mode. If the color chip is not visible, go to the view menu and select show thermographics. Drag the black diamond across the hours of Mar clear.



Question
Please answer the following question using the graphic report:
(More than one answer may be correct).

21) The total equipment load is less than the total occupant load because:

Total heat gain from the office equipment is less than total heat gain from the occupants.
Heat gain per square foot from the office equipment is less than heat gain per square foot from the people in the office.
When equipment is added, people generate more heat by using the equipment.
The equipment is scheduled for fewer hours than the occupant schedule.



22) Save the "(name) Occup & Equip" building file as "(name) O & E nightparty". On some weekends, the people in the office plan to party all night long.




23) Change the occupant and equipment schedule to 9 pm-7am (Set Occ and temp schedules in the Occupant specification or select Schedules... under the Define menu).




24) Change the activity level of the occupancy spec for auditorium to Moderate dancing.




25) Change the density level of the occupancy spec for the office and lobby to 7 persons/100 sf.




26) The graph should look like this. Save.

Question

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

27) The designers and users have asked you to add 300 sf of windows to the south and north elevations of the building, and to comment on the building's cooling load for the month of June for both the regular weekday schedule and the night party. What might you suggest to the designers and users of this community center regarding its cooling load?

Consider having the community center open in the early mornings instead of the daytime so the building might be passively cooled by cross ventilation if such a schedule is feasible.
Since the occupant heat gain is primarily from the auditorium, the designers should reconsider rescheduling the time the auditorium is occupied to avoid midafternoon hours to increase the potential for cooling by ventilation.
A larger building area would generate less heat gains due to occupants and equipment.
Reduce the minimum allowable interior temperature to 60 for the whole 24 hour day.



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

 

Go to:

Exercise #5A

Cool Down #5A
Cool Down #5B


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