A6–Grader’s Comments

Grader To Students

When producing an analysis of systems, be sure to address the reasons why the systems you consider are appropriate particularly to your building type and location, in other words, your project specifications.

Be sure to plan ahead for Assignment 7, you are all well prepared to complete the assignment as long as you schedule enough time to complete it. Keep up the good work!

 

Grader to Professor – With JEM Comments

1. I wonder if CAV and VAV will always be the correct system to choose. Many teams gravitate towards that system.

JEM – As we discussed in class, VAV is by far the most popular because of their efficency and the number of variables they control, though that may change in the future as Dedicated Outdoor Air (DOA) systems increase in popularity.

2. For the criteria matrix, the logic of the system is described but there isn’t a requirement to reflect on the results of the criteria matrix analysis. I wonder if students think that they’re results are plausible. Discussion of results of criteria matrix could help.

JEM – I do hope that you go beyond our brief class discussion and consider the role of computer tools in the design process, both currently and in future.

3. I noticed that many students explained appropriateness based on ability to control air quality conditions, however, the rubric asks to describe the appropriateness of the system based on the specific building type. For this reason, I was looking for specific discussion on how each system would be appropriate for the building type.

JEM – Clearly there connections between the two, but reading carefully is always a good idea.

4. Not many groups addressed “Flow rate” as a parameter

JEM – This parameter is often neglected in practice, not infrequently to detriment of comfort.

5. Many students forgot to address the “excellent” criteria for the energy analysis.

JEM – too bad.