Architectural Engineering Commons^™

A Pore Water Pressure Diffusion Model To Predict Formwork Pressure Exerted By Freshly Mixed Concrete, Chan Kyu Park, Jae Hong Kim, Seong Ho Han

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The formwork pressure exerted by freshly mixed concrete is one of the most important considerations in ensuring the safety of construction in the field. The formwork pressure also affects the quality of concrete structures, determining the final shape of concrete members. Previous studies on the form pressure mostly investigated the intrinsic material effect. For example, the use of self-consolidating concrete increases the maximum pressure on the formwork. The extrinsic factor of a formwork system itself has rarely been considered. In the mockup tests and theoretical evaluations, it is identified that the bleed water-out controlled by the formwork tightness is critical. …

Linking Geospatial Engineering Into Collaborative Multidisciplinary Bim Projects - An Educational Perspective, Avril Behan, Helen Murray, Jonathan Argue, Ronan Hogan, Audrey Martin, Pat O'Sullivan, Robert Moore, Malachy Mathews

Conference papers

This paper describes the background to and execution of a postgraduate project undertaken by students on DIT's MSc in Geospatial Engineering (GeoEng) in support of a project on level 2 BIM being undertaken by students on the MSc in applied Building Information Modelling & Management (aBIMM) around the retrofit of and new build extension to the Grangegorman Clock Tower Building. In support of this requirement, an external and internal survey of the existing structure and its surrounding topography was required. The aBIMM students and staff acted as the Design Team who subcontracted the Geo Eng group who were organised into …

Study On The Methods For Predicting The Performance Of A Hybrid Solar-Assisted Ground-Source Heat Pump System, Zhaoyi Zhuang, Qiqi Zhu, Jian Song, Xin Zhang, Haorong Li

Durham School of Architectural Engineering and Construction: Faculty Publications

It is critical to find suitable setting parameters for designing a hybrid solar-assisted ground-source heat pump system in the practical engineering application, but the heat pump performance is unpredictable after many years of operation. This paper used 2000 sets of performance data collected from solar-assisted GSHP systems that keep operating over 20 years to simulate long term used heat pump with a professional software called GeoStar. Adopted the classification and regression tree (CART) method, the design of solar energy collector areas can be predicted. The multi-linear regression is also utilized to predict average monthly per meter borehole heat exchange. Seasonal …

Research On The Cooling Characteristics In Building Interior Zones Using Displacement Ventilation System, Zhaoyi Zhuang, Yongbin Li, Qiqi Zhu, Jian Song, Haipeng An, Haorong Li

Durham School of Architectural Engineering and Construction: Faculty Publications

The outdoor low temperature fresh air can be used as a free cold source to eliminate waste heat for the building interior zones during the transition season and winter. This paper takes a project in Hunan as an example, and the project building interior zones is 25m×7m×3.9m(L×W×H). Using Fluent software to simulate the temperature field and velocity field both the interior and exterior zones of the engineering offices. The simulation results show that using the displacement ventilation system to take the outdoor air into inner rooms not only cooling but also improving the air quality and adding comfort. According to …

Performance And Energy Efficiency Analysis Of Data Center Cooling Plant By Using Lake Water Source, Li Ling, Quan Zhang, Liping Zeng

Durham School of Architectural Engineering and Construction: Faculty Publications

A cooling plant by using lake water source was proposed to cool the space in data centers. It combines free cooling technology and variable capacity technology to remove heat and reduce energy consumption effectively. In this paper, firstly, the control strategies for this cooling plant were proposed. Then, a detailed annual energy consumption model with considering the effect of the dynamic heat dissipation characteristics of servers, lake water temperature, outdoor weather conditions, and cooling plant thermal performance, will be established to evaluate the performance and energy efficiency of this cooling plant under different load factors. The results show the mode …

Hvac System Remote Monitoring And Diagnosis, Jeffrey N. Arensmeier, Gregg M. Hemmelgarn, Fadi M. Alsaleem, Priotomo Abiprojo

Durham School of Architectural Engineering and Construction: Faculty Publications

A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a building includes a monitoring device installed at the building, a monitoring server located remotely from the building, and a review server. The monitoring device measures an aggregate current Supplied to components of the HVAC system and transmits current data based on the measured aggregate current. The monitoring server receives the transmitted current data and, based on the received current data, assesses whether failures have occurred in first and second components of the HVAC components. The monitoring server generates a first advisory in response to determining that …

Project Impact: A Case Study Of Developing A Manufactured Construction Workforce Through Contextualized Training, Arefeh Mohammadi, Kevin R. Grosskopf

Durham School of Architectural Engineering and Construction: Faculty Publications

With a looming shortage of skilled craft workers forecast to exceed 2 million by 2017, prefabrication may become a necessity for many U.S. contractors attempting to remain competitive with a smaller, lower-skilled workforce. Building components manufactured in a controlled, offsite environment have proven to reduce time, cost and site logistics while improving productivity, quality, safety and sustainability. However, entry-level workers, including more than 765,000 recession displaced manufacturing workers, often lack the basic skills necessary to retrain for jobs in manufactured construction. As a result, a $ 6.3M U.S. Department of Labor grant was awarded to an institutional consortium to develop …

A Case Study Of Upper-Room Uvgi In Densely-Occupied Elementary Classrooms By Real-Time Fluorescent Bioaerosol Measurements, Chunxiao Su, Josephine Lau, Fang Yu

Durham School of Architectural Engineering and Construction: Faculty Publications

Recently, the requirement to continuously collect bioaerosol samples using shorter response times has called for the use of real-time detection. The decreased cost of this technology makes it available for a wider application than military use, and makes it accessible to pharmaceutical and academic research. In this case study, real-time bioaerosol monitors (RBMs) were applied in elementary school classrooms—a densely occupied environment—along with upper-room ultraviolet germicidal irradiation (UVGI) devices. The classrooms were separated into a UVGI group and a non-UVGI control group. Fluorescent bioaerosol counts (FBCs) were monitored on 20 visiting days over a four-month period. The classroom with upper-room …

Social Sustainability Indicators In Mass Housing Construction, Ali Karji, Asregedew Woldesenbet, Mostafa Khanzadi

Durham School of Architectural Engineering and Construction: Faculty Publications

In the construction industry, buildings constitute more than half of the new construction built in the world. With the rapid growth of population in urban areas and high-energy consumption of buildings, considerable attention and efforts have been devoted to creating a sustainably built environment. As a result, various sustainable rating systems, principles and tools have been developed in recent years. This paper presents efforts underway for evaluation of sustainability in mass housing construction projects in the Middle East from a social aspect. The study reviews reports, guidelines and best practices at national and international levels to detect key sustainability indicators. …

Heat - Pump System With Refrigerant Charge Diagnostics, Fadi M. Alsaleem, Gregg H. Hemmelgarn

Durham School of Architectural Engineering and Construction: Faculty Publications

A heat-pump circuit may include an indoor heat exchanger, an outdoor heat exchanger, a compressor adapted to circulate a working fluid between the indoor and outdoor heat exchangers, and an expansion device disposed between the indoor and outdoor heat exchangers. A monitor for the heat-pump system may include a return-air temperature sensor, a supply-air temperature sensor, and a processor. The return-air temperature sensor may be adapted to measure a first air temperature of air upstream of the indoor heat exchanger. The supply-air temperature sensor may be adapted to measure a second air temperature of air down stream of the indoor …

Solar Urban Planning: Addressing Barriers And Conflicts Specific To Renewable Energy Policy And The Current Field And Practice Of Urban Planning Within The Context Of A Changing Climate, Toryl P. Hanna

Capstone Collection

The world is in a period of rapid urbanization while experiencing unprecedented rise in global temperature as a result of climate change. Questions have been raised as to how strategies for urbanization will be able to address the fetish for energy, while halting carbon emissions produced by traditional energy sources for urban inhabitants around the world. First, this paper seeks to look to cities, at the intersection of solar energy and the field of urban planning, looking into the opportunities and challenges that are currently surfacing. Conflicts and barriers in traditional urban land use patterns emerge as a topic of …

Adaptive Environments For Enabling Senior Citizens: An Holistic Assessment Tool For Housing Design And Iot-Based Technologies, Matteo Zallio, Damon Berry, Niccolò Casiddu

Conference papers

The population of older adults will continuously increase over the coming decades. As they get older, people will require assistance and regular monitoring, with higher costs for welfare system and families. Two vital aspects of a healthy lifestyle, are domestic autonomy and maintenance of relationships within the neighborhood. This leads to an interesting research issue: “Could houses and appliances have the potential to improve autonomy and quality of life of citizens? Which methods and tools could enhance wellbeing and healthy conditions? The house has the potential to be a safe, adaptive environment, integrated with technologies for life support. This work …

Ua66 Ogden College Of Science & Engineering Newsletter, Wku Ogden College Of Science & Engineering

Ogden College of Science & Engineering Publications

Newsletter created by and about WKU Ogden College of Science & Engineering.

• Ogden College Hall Taking Shape on TIme & on Budget
• Alumni Focus: Dr. Talia McKinney Collins
• WKU Research Foundation Launches New Website
• French, Jackson. Stemshot Rocketry Competition
• Agriculture
• Architectural & Manufacturing Sciences
• Grants & Publications
• Dr. Noah Ashley Receives NIH Grant
• Biology - News & Notes
• WKU Chemistry Welcomes Dr. Lawrence Hill & Dr. David Wolfgang
• Gary Kwong Receives McNally Award
• Student Teams Compete in National Engineering Contests Over the Summer
• Geology Major Conducts Research in Ethiopia - Deborah Flynn
• Geography & Geology
• WKU Meterology Launches White Squirrel …

Dermal Uptake Directly From Air Under Transient Conditions: Advances In Modeling And Comparisons With Experimental Results For Human Subjects, G. C. Morrison, C. J. Weschler, G. Bekö

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

To better understand the dermal exposure pathway, we enhance an existing mechanistic model of transdermal uptake by including skin surface lipids (SSL) and consider the impact of clothing. Addition of SSL increases the overall resistance to uptake of SVOCs from air but also allows for rapid transfer of SVOCs to sinks like clothing or clean air. We test the model by simulating di-ethyl phthalate (DEP) and di-n-butyl phthalate (DnBP) exposures of six bare-skinned (Weschler et al. 2015, Environ. Health Perspect., 123, 928) and one clothed participant (Morrison et al. 2016, J. Expo. Sci. Environ. Epidemiol., 26, 113). The model predicts …

Shear Wave Velocity And Its Anisotropy Of Polymer Modified High-Volume Class-F Fly Ash-Kaolinite Mixtures, X. Kang, B. Bate

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study investigated the effects of polymers on the small-strain stiffness behavior of high-volume Class-F fly ash-kaolinite mixtures. The shear wave velocity (Vs) and its anisotropy of organically modified fly ash-kaolinite mixtures were evaluated using a self-developed floating wall type consolidometer bender element (BE) testing system. Both synthetic polymers [polyethylene oxide (PEO)] and biopolymers (xanthan gum and chitosan) were used to modify the stiffness of fly ash-kaolinite mixtures. Shear waves generated and received by bender elements were measured to quantify the small-strain stiffness of the organically modified fly ash-kaolinite mixtures in three orthogonal directions, i.e., vh, hv, and hh. The …

A Method For Selecting Hvac Retrofit Solutions For Existing Small- And Medium-Sized Commercial Buildings, Bonggil Jeon

Open Access Dissertations

The primary purpose of the present study is to develop a framework and methodology for evaluating appropriate Heating, Ventilating, and Air Conditioning (HVAC) retrofit solutions that can be effectively retrofitted into different types of small- and medium-sized commercial buildings (SMSCB). Additionally, development of an advanced data-driven decision-making tool is introduced as a benefit of proposed framework. In recent years, considerable attention has been focused on retrofits of existing commercial buildings (IBE, 2013b). In fact, the Commercial Building Energy Consumption Survey (CBECS) 2003 (EIA, 2006) indicates that over 70% of existing commercial buildings across the United States are more than twenty …

The Mustang Sculpture, Natalie Gibbons, Jordan Gates

Architectural Engineering

No abstract provided.

Long Beach Remodel, John Hinrichs

Architectural Engineering

No abstract provided.

An Investigation Of Dx Cooling Coil Inherent Characteristics, Krittima Santiwattana

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

DX cooling coil (DCC) systems have dominated light commercial and household applications in the U.S for several decades. Approximately 14.5% of energy use is consumed by space cooling in commercial buildings, whereas 87% of households are installed with air-conditioners. Improper installation, poor design, and lack of optimized control/operations incur faults in HVAC systems causing 25% to 50% energy waste in a building. These consequences are subject to inefficient equipment modelling of which is developed from: (1) insufficient understanding in equipment characteristics, (2) uncertainties in testing environment and data, and (3) access and cost limitations. Therefore, in this thesis DCC inherent …

A Generic Benchmark For A Mini-Split Heat Pump System, Yuchen Wang

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

Heating, Ventilation, and Air Conditioning (HVAC) accounts for half of the building energy consumption in the U.S where Mini-Split Heat Pumps (MSHPs) are an emerging type of HVAC system. Their utilization has greatly increased by 34% from 2009 to 2013 and high potential EER is recognized for MSHPs. However, there is limited research involving MSHPs systems, and there is no generic benchmark for system testing and modeling. The available simulation tools such as VapCyc, GreatLab, and CYCLE_D are either too complicated, difficult to access, or not freely available. Therefore, an accurate and public share generic benchmark is essential and will …