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Instructions:
Question about Environmental Engineering and Indoor Air Quality Issues
Fill in the blanks in the following problem set. To get credit, you must show all of your labor. Make sure to write properly and cleanly. Keep close eye on the units and crucial figures. Upload the spreadsheet(s) you want to use.
1) Calculating air change and ventilation rates: In the summer of 2020, a research team conducted tracer gas studies in a number of rooms. CO2 was injected from a portable tank to raise CO2 concentrations in the test room, and then the CO2 concentrations were allowed to decay back to background levels in each test. We took CO2 readings both inside and outside the room at the same time. During the tracer experiments, the tested rooms were left empty. The results of one such
test conducted in a room in a room are supplied as indoor and outdoor CO2 data. Estimate the air change rate in the classroom under the tested conditions using this data (CO2 data). Show your work, including the graph (or any other
approach) you used to calculate the AER. Give your answer in inverted hours (1/h) units. Calculate the effective outdoor air flow rate (in CFM) based on these experiments, assuming a floor size of 576 square feet and a ceiling height of 12 feet.
2) Assessing air purification technology
The market for air purification technology is exploding. Several firms are promoting their air cleaning solutions as effective at preventing COVID-19 transmission in interior areas. The marketing statements are frequently strong and sound very
promising:
ABC technology destroys SARS-CoV-2 on surfaces and in the air by using reactive molecules [or super oxides or positive and negative ions]!
The FDA has just awarded XYZ technology emergency approval!
In just 60 minutes, DEF technology lowers viable SARS-CoV-2 [or surrogate organism] by 99.99 percent! You’ve been tasked with assessing the efficacy of one of these technologies from Aerus, which recently hired Deborah Birx, the former
White House Coronavirus Coordinator during the Trump administration, to help promote sales of their ActivePure® technology, which claims to kill a variety of pathogens including SARS-CoV2: https://www.activepure.com/scientific-proof/ . A
collection of test reports (active pure testing dossier) was submitted with this assignment by the manufacturer’s sales representative. Translate their MS2 bacteriophage test results from a log-reduction shown on their website (i.e., 99.9999
percent reduction after 60 minutes) to an equivalent clean air delivery rate using the first report in that packet (I. Aerosol Research and Engineering Laboratories testing of their Medical Guardian product) (CADR). How does this CADR compare to a regular HEPA-filtered portable air cleaner? Comment on any strengths and weaknesses you find in these test reports.
Question about Environmental Engineering and Indoor Air Quality Issues
RUBRIC |
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Excellent Quality 95-100%
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Introduction
45-41 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Literature Support 91-84 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Methodology 58-53 points Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met. |
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Average Score 50-85% |
40-38 points More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided. |
83-76 points Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration. |
52-49 points Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met. |
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Poor Quality 0-45% |
37-1 points The background and/or significance are missing. No search history information is provided. |
75-1 points Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration. |
48-1 points There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met |
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Question about Environmental Engineering and Indoor Air Quality Issues |
Question about Environmental Engineering and Indoor Air Quality Issues