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1	REDUCING SIZE AND COST OF BIOWALL CONTROL SYSTEM Daniel Andres Allocca Kajsza (6630392) 12 October 2021 (has links) <div>The control system of the Purdue Biowall (the botanical air filter) prototype has been targeted for replacement to improve the potential for commercialization. This thesis is focused on evaluating and improving the performance of a new control system based on a single board computer, which is slated to replace a much larger and more expensive Building Automation System that is currently being used. This analysis considers size, cost, accuracy of sensors, and data logging.</div><div>The research was conducted in three phases. Initially, an evaluation of an existing control prototype was conducted and several critical hardware failures were identified. Some of the most significant malfunctions were caused by broken wires, incorrect power supply voltage, and a short circuit due to poor soldering. The second phase of work involved improving the hardware and software for the control platform. All the problems found were fixed to make the control system completely operational. Moreover, a Printed Circuit Board (PCB) was designed to replace the breadboard previously used. The third phase of work was evaluating the performance of the new control system. Evaluations at a component level (e.g. individual sensors) and the overall system (e.g. including Biowall control algorithm) were conducted.</div><div>After a complete assessment, it was determined that a cheaper and smaller single board computer control system is able to substitute for the current Building Automation System. The accuracy of the sensors and the data collection were within the values expected. The physical size and cost of the controller was reduced by a factor of 30. The results obtained have identified several areas where further improvement is still needed. An efficient data logging code, replacement of wires, and PCB enhancement are still needed before deploying the new control solution into a building.</div> Technology not elsewhere classified Biowall Botanical air filtration
2	An Improved Airflow and Watering Balance for a Biowall Dhanurja De Silva (16650390) 07 August 2023 (has links) <p>Clean indoor air is a necessity, in the past opening a window or supplying outdoor air would suffice for removing indoor contaminated air. As humans live in more dense neighborhoods or urban areas, the need for energy efficient clean indoor air is important. As outdoor air pollution increases, a Biowall is a device to improve aesthetics and clean indoor air by pulling air through the root zone of plants in a loosely packed growth media. The Biowall is a sustainable supplement to a single use air filter. For this research a small Biowall was designed, fabricated, tested, and installed in the Children’s wing of a public library. The airflow simulation and watering for the Biowall was explored using Autodesk CFD to simulate the airflow through growth media and identify a hole pattern to distribute airflow evenly through the plant trays. Various watering line designs were also tested until the rectangular design proved to be more balanced at distributing the water evenly to the growth media. Finally, the air cleaning ability of the Biowall was tested using a Clean Air Delivery Rate (CADR) test to quantify the cleaning rate. The Biowall provided 12 cfm of clean air, or about 2 cfm/sq ft of plant tray area. </p> Models and simulations of design Environmentally sustainable engineering Indoor Air Quality and Ventilation Biowall Indoor Environment Quality
3	Vertical gardening in a northern city; speculations for Winnipeg Urben-Imbeault, Tamara 26 May 2015 (has links) This practicum is a reference for vertical gardeners in cold climates. Winnipeg, Manitoba is explored, however findings may be applied to other cities in similar climates. First, the history of vertical gardening is discussed, then the types of vertical gardens currently on the market are described. These can be classified into two categories: soil bearing or non-soil bearing. Most designs are modular pre-planted systems that can be attached to any wall, as long as it satisfies the structural requirements recommended by the manufacturer. The benefits of vertical gardening have been shown to be rather extensive, covering a wide range of areas. Aesthetic improvement, reduction of the Urban Heat Island (UHI) effect, improvement of air quality, stormwater absorption, noise reduction, native habitat integration, reduction of heating and cooling costs for buildings, food production, marketing, and biophilia are all benefits explored in detail. Difficulties associated with vertical gardening are discussed, specifically the lack of knowledge and awareness of vertical gardens, lack of empirical evidence (or missing details in existing research), overall cost and lack of financial incentives, lack of industry codes, and various associated risks. Design framework exists within microclimate conditions unique to vertical gardens, as well as neighbourhood and regional (micro)climates. Theories relating to the study of green walls covered include the human ecosystem model, urban reconciliation ecology, habitat templating, the urban cliff hypothesis, and wall ecology. Suitable habitat templates identified for vertical gardens in Winnipeg are cliffs, sand dunes, alvars, mixed grass prairie and prairie potholes. Design parameters to be followed for vertical garden design in Winnipeg are to ensure that lightweight materials are used, to provide insulation to protect plants from sudden temperature changes, to choose plants that grow in the region and are adapted to grow in areas with limited soil, increased wind, varying degrees of sunlight (depending on orientation), and increased pollution and salt spray depending on location. / October 2015
4	The Biowall Field Test Analysis and Optimization Jacob J. Torres (5930906) 14 May 2019 (has links) <div> <p>A residential botanical air filtration system (Biowall) to investigate the potential for using phytoremediation to remove contaminants from indoor air was developed. A full scale and functioning prototype was installed in a residence located in West Lafayette, Indiana. The prototype was integrated into the central Heating, Ventilating, and Air Conditioning (HVAC) system of the home. This research evaluated the Biowall operation to further its potential as an energy efficient and sustainable residential air filtration system.<br></p> <p> </p> <p>The main research effort began after the Biowall was installed in the residence. A field evaluation, which involved a series of measurements and data analysis, was conducted to identify treatments to improve Biowall performance. The study was conducted for approximately one year (Spring 2017-Spring 2018). Based on the initial data set, prioritization of systems in need of improvement was identified and changes were imposed. Following a post-treatment testing period, a comparison between the initial and final performances was completed with conclusions based on this comparison. </p> <p> </p> <p>The engineering and analysis reported in this document focus on the air flow path through the Biowall, plant growth, and the irrigation system. The conclusions provide an extensive evaluation of the design, operation, and function of the Biowall subsystems under review.</p> </div> <br> Botany CAD/CAM Systems Metals and Alloy Materials Engineering not elsewhere classified Simulation and Modelling Computational Logic and Formal Languages Engineering Design Methods Engineering Systems Design Additive Manufacturing Botanical air filtration Building Automated System BAS Biowall phytoremediation. Sick Building Syndrome Controlled Environments NCERA-101 Six Sigma whirlpool ReNEWW Home plant growth experiment irrigation system Air Flow Distribution Characteristics Air Flow growth media experiments Plant Growth in Controlled Environments NASA Residential Air Filtration HVAC Automated Logic

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