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Engr305 Appropriate Technology page in progress
This page is a project in progress by students in Engr305 Appropriate Technology. Please do not make edits unless you are a member of the team working on this page, but feel free to make comments on the discussion page. Check back for the finished version on May 15, 2017.



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CAPTION TEXT

Abstract[edit]

Short abstract describing the project from background to conclusion

Background[edit]

Describe the background of the project. Make sure to cover who, what, why, when and where…

Problem statement[edit]

Start your project objective statement in the format, "The objective of this project is to..."

The object of this project is to design, construct, and successfully test an energy efficient dehumidifier capable of lowering humidity within the CCAT greenhouse to levels optimal for plant growth. The dehumidifier will be assembled from easily accessible recycled or sustainable materials. The dehumidifier should not interfere with anything growing inside the greenhouse, which requires additional consideration. Drawing moisture from the air can be done by either naturally porous materials that retain water or by utilizing a low energy fan to direct humidity into a collection pan for dumping.Various materials will be analyzed for their absorption rates including charcoal, rice, and rock salt. Testing will be done in a room roughly the same size as the greenhouse with comparable surface areas of glass windows. When hot water is allowed to run the room will eventually hold enough humidity to accurately simulate a greenhouse environment. The success of the CCat greenhouse dehumidifier will be determined when it can be left unattended in a humid room for several hours and efficiently collect airborne moisture into a container that can the be used to water plants in the greenhouse.


Criteria[edit]

Include a brief intro to the criteria and then include a table with constraints and weights (0-10 highest). Feel free to use the code from examples, such as CCAT pedal powered TV#Evaluation Criteria.

Grading Criteria for previous sections:

  • Formatting (should look good, sortable table for criteria) +20
  • Thoroughness of content (who, what, when, were, etc.) +40
  • Considers audience (this will be read by people outside the US and in the future, consider things such as most people do not know where Arcata is) +30
  • Extra (e.g. images) +10

The following Criteria to evaluate this project have been chosen based on the requests of the CCAT co-director in charge of the greenhouse . The scale (1-10) represents the importance level of meeting the constraint of each listed criteria.

Criteria Constraints Weight
(1-10)
Maintainability Establish operators manual for future students to eliminate the need for an instructor.
8
Safety & Placement Fan and condensing equipment must be firmly secured with zero electrical hazards.
8
Reproducibility The structure could be reproduced with similar materials.
6
Usability Operating dehumidifier must be as simple as possible (turning on a fan).
9
Cost Must not exceed budget.
7
Functionality Successfully dehumidifies greenhouse.
10


Literature Review[edit]

Introduce the literature review briefly and then use heading and subheadings for topics. This should focus on information… NO PLAGIARISM! Make sure to see assignments on Moodle.[1]

Grading criteria for Literature Review:

  • Formatting (should look good, see Appropedia suggested formatting) +20
  • Thoroughness of research (at least 3 books and 1 peer reviewed journal per person... lots of credible web refs) +40
  • Uses reference format +30
  • Extra (amazing sources) +10

This is a review of the available literature pertinent to the CCAT greenhouse dehumidifier project. Preliminary research for the dehumidifier project consists of peer-reviewed material science and environmental engineering journals, other home dehumidification system examples, and various books on humidity in cold regions.


Cost Table[edit]

Quantity Material Source Cost ($) Total ($)
1 3" diameter aluminum ducting elbow (rotating) Ace Hardware 4.99 4.99
1 3" diameter aluminum ducting round pipe (24" long) Ace Hardware 4.99 4.99
1 Premium Foil Duct Tape Ace Hardware 18.99 18.99
1 Flexible aluminum duct 3" diameter, 5' length with lint trap box Ace Hardware 16.99 16.99
1 Multi-purpose vent Ace Hardware 9.99 9.99
1 4" Dryer vent hood Ace Hardware 10.99 10.99
Total Cost $66.61

Introduction to dehumidification[edit]

A dehumidifier is a device that removes humidity from its surroundings. In this case this will be the CCAT greenhouse. Excess humidity in a greenhouse can be detrimental to plant health, which necessitates the introduction of an appliance designed to dehumidify. The dehumidification process involves drawing moisture from the air by use of a fan and tub system or by a form of naturally absorptive materials. Examples of such materials include calcium chloride, silica gel, and activated carbon.[2] Humidity can be quantified by a humidity sensor.

Dehumidification via fan[edit]

Mechanical dehumidifiers operate by a fan pulling the air from the room first through an evaporator and then a condenser.[3] Dry air is then blown by the fan back into the room, leaving the condensed water in a reservoir bucket. This method of dehumidification is far more common and is used in both home and commercial settings. Mechanical dehumidifiers are typically preferred in cold climates because relative humidity is higher in these areas,[4] so often a fan and filer are required to draw water from the air as opposed to a natural method. One benefit of this way to dehumidify is that the water collected in the bucket below the evaporator is can be reused to water the plants in the greenhouse. The clear downside to this method is energy consumption, so more research is required to find a solution to this. One possible alternative could be solar power.

Dehumidification via porous material[edit]

This method of dehumidification utilizes a material known as a desiccant, which acts as a drying agent by absorbing moisture from the air. Such materials include calcium chloride, silica, rock salt, and activated carbon.[5] All four of the substances will be evaluated, then compared with the mechanical dehumidifier to determine the most effective method for the greenhouse to use. one definite benefit to dehumidification through this method is that no energy is required to draw water from the air due to the desiccant properties of these materials.[6] One potential downside is the health hazards associated with calcium chloride such as lung damage and other respiratory problems.[7]


Prototyping[edit]

Show examples of the prototyping process including what you learned.

Construction[edit]

Very complete description of how final project is made. This large section should have lots of pictures. Use the Help:Images#Galleries and probably Template:How_to (e.g. Barrel O' Fun Worm Bin Instructions).

Timeline[edit]

Introduce the timeline and include a table of the timeline.

Grading criteria for timeline:

  • Spelling and grammar +15
  • Completeness of timeline +35
  • Table formatting +15
  • Timeline introduced +15
  • Separate columns for propose and actual completion date.
ITEM PROPOSED DATE DATE MET?

-

Finish gathering all required materials 3/10/17
Initial assembly and testing at CCAT greenhouse 3/14/17
Efficiency assessment (fan, tubes, etc.) 3/16/17
Observably lower and maintain greenhouse humidity for a prolonged period of time 3/22/17
Teach CCAT members how to operate and maintain the completed dehumidifier system 4/10/17
CCAT Greenhouse Dehumidifier project completed and installed, presentation given to class, and Appropedia page submitted to Lonny 5/5/17 or earlier (must review dates)

Cost Table[edit]

Quantity Material Source Cost ($) Total ($)
1 3" diameter aluminum ducting elbow (rotating) Ace Hardware 4.99 4.99
1 3" diameter aluminum ducting round pipe (24" long) Ace Hardware 4.99 4.99
1 Premium Foil Duct Tape Ace Hardware 18.99 18.99
1 Flexible aluminum duct 3" diameter, 5' length with lint trap box Ace Hardware 16.99 16.99
1 Multi-purpose vent Ace Hardware 9.99 9.99
1 4" Dryer vent hood Ace Hardware 10.99 10.99
Total Cost $66.61

Costs[edit]

Description of costs, donations, the fact that this is just proposed, etc. See Help:Table_examples#Cost_Table for a very nice looking table format.

Grading criteria for costs:

  • Formatting (should look good, see Help:Table_examples#Cost_Table formatting) +20
  • Thoroughness and up-to-dateness of budget (should display necessary components, including donations, have an introduction, etc) +40
  • Mathematical accuracy +30
  • Extra (sortable, etc) +10

Operation[edit]

This is how to operate. It should have a brief introduction and very useful images with labels. Also it may work best for your project to use the step by step how to template {{How to}}. See #Troubleshooting for an example.

Maintenance[edit]

Introduce this maintenance section.

Schedule[edit]

This is when to maintain what.

Daily
  • A daily task
  • A daily task
Weekly
  • a weekly task
  • a weekly task
Monthly
  • a monthly task
  • a monthly task
Yearly
  • a yearly task
  • a yearly task
Every __ years
  • task
  • task

Instructions[edit]

This is how to maintain. The step by step how to template {{How to}} is most likely best for this part.

How to Do Something
ImageStep
Backpack frame bike trailer Step 1 : Do something.
Aleiha's parabolic solar cooker Step 2 : Do something really complicated but made simple, etc.

Conclusion[edit]

Testing results[edit]

Describe the testing results.

Discussion[edit]

Discuss the testing results.

Lessons learned[edit]

Discuss lessons were learned during this project and what you would do different next time.

Next steps[edit]

Discuss any next steps for the project as it goes on into the future.

Troubleshooting[edit]

This is only how to troubleshoot basic operation. For complex issues, the solution might just say contact ________. It should be a table in this format:

Problem Suggestion
Example issue Example solution or suggestion
Does not turn on Make sure it is plugged in
Another issue Et cetera

Team[edit]

Introduce team and semester in the following format:

Grading criteria[edit]

Grading criteria for the remaining sections:

  • Grammar and spelling +10
  • Formatting +10
  • Depth, breadth and accuracy of content +70
  • Project documentation's potential for impact (e.g. reproduction) +10

All together these section grades are applied to a final grading rubric described on Moodle.

References[edit]

  1. For example at 305 literature review template you will see the recommendation to use Help:Footnotes.
  2. 5. Sultan, Muhammad, et al. "Experimental study on carbon based adsorbents for greenhouse dehumidification." Evergreen 1.2 (2014): 5-11.
  3. Geving, Stig, and Jonas Holme. "Mean and diurnal indoor air humidity loads in residential buildings." Journal of Building Physics 35, no. 4 (2012): 392-421. doi:10.1177/1744259111423084.
  4. Posudin, Yuriy. Methods of Measuring Environmental Parameters (1). Somerset, US: Wiley, 2014. Accessed January 30, 2017. ProQuest ebrary.
  5. 3. Seo, Y.-K., Yoon, J. W., Lee, J. S., Hwang, Y. K., Jun, C.-H., Chang, J.-S., Wuttke, S., Bazin, P., Vimont, A., Daturi, M., Bourrelly, S., Llewellyn, P. L., Horcajada, P., Serre, C. and Férey, G. (2012), Energy-Efficient Dehumidification over Hierarchically Porous Metal–Organic Frameworks as Advanced Water Adsorbents. Adv. Mater.
  6. 6. ShyeAnne. "How to Dehumidify Your Room Naturally." Dengarden. April 14, 2016. Accessed January 31, 2017.
  7. 8. The Dangers of Using Calcium Chloride for Dehumidifying. Eva-Dry. August 16, 2016. Accessed February 01, 2017.

Bibliography[edit]

1. "New inexpensive method for greenhouse dehumidification." Hortidaily: global greenhouse news. Accessed January 31, 2017. http://www.hortidaily.com/article/2015/New-inexpensive-method-for-greenhouse-dehumidification.

2. Geving, Stig, and Jonas Holme. "Mean and diurnal indoor air humidity loads in residential buildings." Journal of Building Physics 35, no. 4 (2012): 392-421. doi:10.1177/1744259111423084. http://journals.sagepub.com.ezproxy.humboldt.edu/doi/abs/10.1177/1744259111423084

3. Seo, Y.-K., Yoon, J. W., Lee, J. S., Hwang, Y. K., Jun, C.-H., Chang, J.-S., Wuttke, S., Bazin, P., Vimont, A., Daturi, M., Bourrelly, S., Llewellyn, P. L., Horcajada, P., Serre, C. and Férey, G. (2012), Energy-Efficient Dehumidification over Hierarchically Porous Metal–Organic Frameworks as Advanced Water Adsorbents. Adv. Mater. http://onlinelibrary.wiley.com.ezproxy.humboldt.edu/doi/10.1002/adma.201104084/full

4. Posudin, Yuriy. Methods of Measuring Environmental Parameters (1). Somerset, US: Wiley, 2014. Accessed January 30, 2017. ProQuest ebrary. http://site.ebrary.com.ezproxy.humboldt.edu/lib/hsulib/detail.action?docID=10907551

5. Sultan, Muhammad, et al. "Experimental study on carbon based adsorbents for greenhouse dehumidification." Evergreen 1.2 (2014): 5-11. http://catalog.lib.kyushu-u.ac.jp/ja/recordID/1495157?repository=yes

6. ShyeAnne. "How to Dehumidify Your Room Naturally." Dengarden. April 14, 2016. Accessed January 31, 2017. https://dengarden.com/cleaning/Ways-to-Dehumidify-Your-Greenhouse-andor-Home-Environment.

7. PSYCHROMETRICS for Engineers. PSYCHROMETRICS for Engineers. Accessed February 01, 2017.

http://www.linric.com/desicc.htm.

8. The Dangers of Using Calcium Chloride for Dehumidifying. Eva-Dry. August 16, 2016. Accessed February 01, 2017.

https://www.eva-dry.com/blog/dehumidifiers/the-dangers-of-using-calcium-chloride-for-dehumidifying/.




Make sure to include other relevant categories at the bottom, e.g. [[Category:CCAT]], [[Category:Pedal_power]], etc.