Matching Items (7)
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- All Subjects: Architecture
- Creators: Reddy, T Agami
Description
The ability to design high performance buildings has acquired great importance in recent years due to numerous federal, societal and environmental initiatives. However, this endeavor is much more demanding in terms of designer expertise and time. It requires a whole new level of synergy between automated performance prediction with the human capabilities to perceive, evaluate and ultimately select a suitable solution. While performance prediction can be highly automated through the use of computers, performance evaluation cannot, unless it is with respect to a single criterion. The need to address multi-criteria requirements makes it more valuable for a designer to know the "latitude" or "degrees of freedom" he has in changing certain design variables while achieving preset criteria such as energy performance, life cycle cost, environmental impacts etc. This requirement can be met by a decision support framework based on near-optimal "satisficing" as opposed to purely optimal decision making techniques. Currently, such a comprehensive design framework is lacking, which is the basis for undertaking this research. The primary objective of this research is to facilitate a complementary relationship between designers and computers for Multi-Criterion Decision Making (MCDM) during high performance building design. It is based on the application of Monte Carlo approaches to create a database of solutions using deterministic whole building energy simulations, along with data mining methods to rank variable importance and reduce the multi-dimensionality of the problem. A novel interactive visualization approach is then proposed which uses regression based models to create dynamic interplays of how varying these important variables affect the multiple criteria, while providing a visual range or band of variation of the different design parameters. The MCDM process has been incorporated into an alternative methodology for high performance building design referred to as Visual Analytics based Decision Support Methodology [VADSM]. VADSM is envisioned to be most useful during the conceptual and early design performance modeling stages by providing a set of potential solutions that can be analyzed further for final design selection. The proposed methodology can be used for new building design synthesis as well as evaluation of retrofits and operational deficiencies in existing buildings.
ContributorsDutta, Ranojoy (Author) / Reddy, T Agami (Thesis advisor) / Runger, George C. (Committee member) / Addison, Marlin S. (Committee member) / Arizona State University (Publisher)
Created2013
Description
Overview: Transition from the pediatric to adult care setting for 'emerging adults' (ages 18- 26) continues to develop as a growing concern in health care. The Adolescent Transition Program teaches chronically ill 'emerging adults' disease self-management skills while promoting a healthy lifestyle. Transferring this knowledge is vital for successful health care outcomes. Unfortunately, patients who have been transferred to the adult care setting, report that they felt lost in the system due to lack of communication between care teams, inadequate support systems, and insufficient disease management knowledge. To address these gaps, the design of the physical environment must adapt to these challenges while also meeting the needs of various chronic illnesses. Methodology: Design thinking or human-centered design was utilized as the vehicle to discover unmet 'emerging adult' and adolescent health clinician needs. Ethnographic research methods involved observations at adolescent health clinics and in learning environments outside of the healthcare setting as well as interviews with 5 outpatient adolescent clinicians. A survey was also conducted with 16 'emerging adults' to understand how they learn. Lastly, a literature review explored the history of the adolescent, adolescent development, adolescence and chronic illness, and The Adolescent Transition Program. Results: Findings revealed that physical environment must be conducive to meet a variety of clinical and education activities such as chronic disease management, support adolescent development, and should be more human-centered. The space should transform to the patient education or clinical activity rather than the activity transforming to the space. Five design recommendations were suggested to ensure that the outpatient clinic supported both clinician and 'emerging adults' needs.
ContributorsAlmon, Natalie (Author) / Bernardi, Jose (Thesis advisor) / Takamura, John (Committee member) / Damgaard, Anni (Committee member) / Arizona State University (Publisher)
Created2014
Description
A post occupancy evaluation (POE) was conducted at the Ngeruka Health Center (NHC) in the Bugesera District of Rwanda. The POE was limited to the education spaces within the health center, its participants, and staff. A POE is a combination of methods both quantitative and qualitative to determine user satisfaction and whether the design intent of the built environment was met.
In rural Rwanda where healthcare facilities are scarce and people become seriously ill from preventable diseases, help is needed. The smallest injuries become life threatening. Healthcare facilities and providers must develop approaches that stop these minor illnesses and diseases from costing further problems.
The healthcare facility is a healing environment. Healing environments nurture health and provide a sense of safety and security. The Ngeruka facility has incorporated education spaces within their facility to teach the community ways to prevent minor health problems from becoming major ones.
The research that was conducted at this healthcare facility sought to answer the main questions: Does the built environment of the NHC contribute to healing by engaging education program attendees to learn about preventing illness and disease and other health promotion strategies? In addition, can you measure healing effects of the built environment?
The research took measurements of the built environment and combined them with user satisfaction questionnaires. Site observations and a participant engagement questionnaire were used to determine the amount of engagement the participants put forth into the education programs within the designated design space. Measuring engagement is a tool schools use to find out if their facilities are producing their intended results. This same thought process was incorporated into this research. The participants did prove to be engaged, but it is not definitive that the built environment was responsible. It was a combination of many factors.
In rural Rwanda where healthcare facilities are scarce and people become seriously ill from preventable diseases, help is needed. The smallest injuries become life threatening. Healthcare facilities and providers must develop approaches that stop these minor illnesses and diseases from costing further problems.
The healthcare facility is a healing environment. Healing environments nurture health and provide a sense of safety and security. The Ngeruka facility has incorporated education spaces within their facility to teach the community ways to prevent minor health problems from becoming major ones.
The research that was conducted at this healthcare facility sought to answer the main questions: Does the built environment of the NHC contribute to healing by engaging education program attendees to learn about preventing illness and disease and other health promotion strategies? In addition, can you measure healing effects of the built environment?
The research took measurements of the built environment and combined them with user satisfaction questionnaires. Site observations and a participant engagement questionnaire were used to determine the amount of engagement the participants put forth into the education programs within the designated design space. Measuring engagement is a tool schools use to find out if their facilities are producing their intended results. This same thought process was incorporated into this research. The participants did prove to be engaged, but it is not definitive that the built environment was responsible. It was a combination of many factors.
ContributorsWakelam, Sheila M (Author) / Takamura, John (Thesis advisor) / Patterson, Mark (Thesis advisor) / McDermott, Lauren (Committee member) / Arizona State University (Publisher)
Created2015
Description
The humans-food relationship is a 2.5 million year old, symbiotic connection of “living together” which encouraged a “system of communication up and down the food chain” (Pollan, 2008). (Reardon, 2015). Many researchers agree that this connection is a critical foundation for a beneficial relationship with food and engaging in healthy eating behaviors (McKeown, 2010; Neumark-Stainer et al., 2007; Ristovski-Slejepcevic et al., 2008; Simontacchi, 2007). Against the backdrop of a steadily increasing obesity rate and associated spending, it is critical to approach this issue from a systematic perspective such as understanding the powers that impact the consumer-food relationship (Aronne and Havas, 2009). Experts agree that the rapid increase in convenience food environments has contributed to an obesogenic foodscape that has negatively impacted consumers’ understanding of and interactions with food, resulting in consumption of nutritionally poor food, over-nutrition and chronic illness (Brownell and Battle-Horgen, 2004; Nestle, 2002). Additionally, designers and researchers are beginning to recognize the influence the built environment can have on actions (Patel, 2012; Wansink, 2010), behaviors and attitudes (Gallagher, 1993), even hindering or encouraging one to partake in healthy behaviors (Mikkelsen, 2011; Story et al., 2008). The goal of this study is to understand modern built convenience food environment design and its potential to impact the consumer-food relationship. This study utilizes a heavily qualitative approach, structured by a grounded theory methodology due to the lack of existing research (Martin & Hanington, 2012; O’Leary, 2010) and triangulates utilizing an analysis of secondary research, environmental audit through observations and a survey. The final result will be a compilation of design suggestions, based on those findings, for designing a BCCFE that encourages a healthy relationship between the consumer and food.
ContributorsPlattner, Lainie (Author) / Takamura, John (Thesis advisor) / Heywood, William (Committee member) / Krahe, Jennifer E (Committee member) / Arizona State University (Publisher)
Created2015
Description
Passive cooling techniques, specifically passive downdraft cooling (PDC), have proven to be a solution that can address issues associated with air conditioning (AC). Globally, over 100 buildings have integrated PDC in its different forms, most of which use direct evaporative cooling. Even though all surveyed buildings were energy efficient and cost-effective and most surveyed buildings were thermally comfortable, application of PDC remains limited. This study aims to advance performance of the single stage passive downdraft evaporative cooling tower (PDECT), and expand its applicability beyond the hot dry conditions where it is typically used, by designing and testing a multi-stage passive and hybrid downdraft cooling tower (PHDCT). Experimental evaluation on half-scale prototypes of these towers was conducted in Tempe, Arizona, during the hot dry and hot humid days of Summer, 2017. Ambient air dry-bulb temperatures ranged between 73.0°F with 82.9 percent coincident relative humidity, and 123.4°F with 7.8 percent coincident relative humidity. Cooling systems in both towers were operated simultaneously to evaluate performance under identical conditions.
Results indicated that the hybrid tower outperformed the single stage tower under all ambient conditions and that towers site water consumption was at least 2 times lower than source water required by electric powered AC. Under hot dry conditions, the single stage tower produced average temperature drops of 35°F (5°F higher than what was reported in the literature), average air velocities of 200 fpm, and average cooling capacities of 4 tons. Furthermore, the hybrid tower produced average temperature drops of 45°F (50°F in certain operation modes), average air velocities of 160 fpm, and average cooling capacities exceeding 4 tons. Under hot humid conditions, temperature drops from the single stage tower were limited to the ambient air wet-bulb temperatures whereas drops continued beyond the wet-bulb in the hybrid tower, resulting in 60 percent decline in the former’s cooling capacity while maintaining the capacity of the latter. The outcomes from this study will act as an incentive for designers to consider incorporating PDC into their designs as a viable replacement/supplement to AC; thus, reducing the impact of the built environment on the natural environment.
Results indicated that the hybrid tower outperformed the single stage tower under all ambient conditions and that towers site water consumption was at least 2 times lower than source water required by electric powered AC. Under hot dry conditions, the single stage tower produced average temperature drops of 35°F (5°F higher than what was reported in the literature), average air velocities of 200 fpm, and average cooling capacities of 4 tons. Furthermore, the hybrid tower produced average temperature drops of 45°F (50°F in certain operation modes), average air velocities of 160 fpm, and average cooling capacities exceeding 4 tons. Under hot humid conditions, temperature drops from the single stage tower were limited to the ambient air wet-bulb temperatures whereas drops continued beyond the wet-bulb in the hybrid tower, resulting in 60 percent decline in the former’s cooling capacity while maintaining the capacity of the latter. The outcomes from this study will act as an incentive for designers to consider incorporating PDC into their designs as a viable replacement/supplement to AC; thus, reducing the impact of the built environment on the natural environment.
ContributorsAl-Hassawi, Omar Dhia Sadulah (Author) / Bryan, Harvey (Thesis advisor) / Reddy, T Agami (Committee member) / Chalfoun, Nader (Committee member) / Arizona State University (Publisher)
Created2017
Description
The rapid rate of urbanization coupled with continued population growth and anthropogenic activities has resulted in a myriad of urban climate related impacts across different cities around the world. Hot-arid cities are more vulnerable to induced urban heat effects due to the intense solar radiation during most of the year, leading to increased ambient air temperature and outdoor/indoor discomfort in Phoenix, Arizona. With the fast growth of the capital city of Arizona, the automobile-dependent planning of the city contributed negatively to the outdoor thermal comfort and to the people's daily social lives. One of the biggest challenges for hot-arid cities is to mitigate against the induced urban heat increase and improve the outdoor thermal. The objective of this study is to propose a pragmatic and useful framework that would improve the outdoor thermal comfort, by being able to evaluate and select minimally invasive urban heat mitigation strategies that could be applied to the existing urban settings in the hot-arid area of Phoenix. The study started with an evaluation of existing microclimate conditions by means of multiple field observations cross a North-South oriented urban block of buildings within Arizona State University’s Downtown campus in Phoenix. The collected data was evaluated and analyzed for a better understanding of the different local climates within the study area, then used to evaluate and partially validate a computational fluid dynamics model, ENVI-Met. Furthermore, three mitigation strategies were analyzed to the Urban Canopy Layer (UCL) level, an increase in the fraction of permeable materials in the ground surface, adding different configurations of high/low Leaf Area Density (LAD) trees, and replacing the trees configurations with fabric shading. All the strategies were compared and analyzed to determine the most impactful and effective mitigation strategies. The evaluated strategies have shown a substantial cooling effect from the High LAD trees scenarios. Also, the fabric shading strategies have shown a higher cooling effect than the Low LAD trees. Integrating the trees scenarios with the fabric shading had close cooling effect results in the High LAD trees scenarios. Finally, how to integrate these successful strategies into practical situations was addressed.
ContributorsAldakheelallah, Abdullah (Author) / Reddy, T Agami (Thesis advisor) / Middel, Ariane (Committee member) / Coseo, Paul (Committee member) / Arizona State University (Publisher)
Created2020
Description
Building-integrated carbon-capture (BICC) is an envisioned mechanism capable of absorbing carbon dioxide (CO2) from the air to be stored and then converted into useful carbon-based materials without negatively impacting the environment. This dissertation builds on the authors' previous work, in which building façades were treated as artificial leaves capable of providing shade to lower solar heat gain, while simultaneously capturing CO2 through the air filters attached to the building façades by attempting a different approach capable of capturing CO2 within buildings. This dissertation presents the author’s work on BICC, where buildings are envisioned as CO2 reservoirs or vacuums, into which mechanical systems introduce fresh air, and through human activities, the air within the building becomes enriched with CO2 before being pushed out back to the outer environment. The design of a carbon-capture mechanism will take advantage of the ventilation side of existing HVAC systems, through which BICC captures CO2 from the exhaust-enriched CO2 air. BICC will utilize existing opportunities and components within buildings represented in the high CO2 concentration in buildings, ventilation guidelines, mechanical equipment represented in air handling unit and air duct network, in addition to natural gas grid connectivity. BICC will capture CO2 through buildings' mechanical system, and the captured CO2 would then be converted into renewable methane to be injected into the existing natural gas pipeline network. This dissertation will investigate the potential of BICC to offset carbon emissions from multiple commercial building types and will present a utilization strategy for the captured carbon.
ContributorsBen Salamah, Fahad (Author) / Bryan, Harvey (Thesis advisor) / Lackner, Klaus (Committee member) / Reddy, T Agami (Committee member) / Arizona State University (Publisher)
Created2021