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Articles 1 - 17 of 17
Full-Text Articles in Environmental Design
Mechanical And Thermal Evaluation Of Different Types Of Pcm-Concrete Composite Panels, Dervilla Niall, Oliver Kinnane, Roger West, Sarah Mccormack
Mechanical And Thermal Evaluation Of Different Types Of Pcm-Concrete Composite Panels, Dervilla Niall, Oliver Kinnane, Roger West, Sarah Mccormack
Conference papers
ABSTRACT: Thermal mass indicates the ability of a material to store and release heat and is a function of the heat storage capacity of a material. The thermal mass of construction materials can be used to reduce the energy required for heating and cooling buildings. The heat storage capacity of concrete can be increased by incorporating phase change materials (PCMs) into the concrete and hence providing additional latent heat storage capacity. Research was carried out to compare the thermal behaviour of two different types of PCM/concrete composite panels. The first type of panel was formed by adding microencapsulated paraffin to …
Is Zero Net Energy 2020 Actually Attainable, Perceptions Of Various Professionals Effected, Michael Aldridge
Is Zero Net Energy 2020 Actually Attainable, Perceptions Of Various Professionals Effected, Michael Aldridge
Construction Management
California has created a mandate that will require all new residential buildings to become Zero Net Energy by 2020. Some are already doing it others don’t know what it means, and some don’t think it will be possible. Those that already do it are doing it without any extra cost. All that is required is, on average, a 4KW roof solar panel system. This is something that easy to install and only requires a little more planning during the design phase. There are many other things that a designer and builder can do to successfully reach ZNE including focus on …
The Chorro Valley Trail From Cal Poly To Cuesta College, Nichole M. Garner
The Chorro Valley Trail From Cal Poly To Cuesta College, Nichole M. Garner
City and Regional Planning
No abstract provided.
Far West Water Ski Club Floating Dock Replacement, Jeffery L. Hadley
Far West Water Ski Club Floating Dock Replacement, Jeffery L. Hadley
Construction Management
A project based senior project, the Far West Floating Dock Project included the design, procurement and construction of two 20’x 20’ floating docks for the Lake Nacimiento based nonprofit Far West Water Ski Club. Constructed of polyethylene coated floats, 4x Pressure Treated lumber, hot-dipped galvanized hardware and composite decking, the dock is designed to have a lifespan of at least 35-40 years. This case study provides an overview of the complete project delivery, beginning with the conception and research, transitioning to design and procurement, and finishing with construction and lessons learned. The overall project cost landed at $21,712.00, made possible …
De-Westernizing The Far East, Jericho K. Kakaio-Edwards
De-Westernizing The Far East, Jericho K. Kakaio-Edwards
Undergraduate Honors Theses
Isolated by the Tibetan highlands which frame Yunnan’s northwest fringes, the ethnic minorities who call the region home live in rural settings ranging from rice-terraced fields to tropical forests; lifestyle unchanged for hundreds of years. However, with globalization causing an exposure to western standards of living, in conjunction with the country’s predisposition towards all things foreign, the people of Yunnan have begun forgoing generations of vernacular architecture in favor of modern materials and regionally defunct construction methods. Here, we will seek to address this foible of architectural development by offering theoretical construction methods for housing types found throughout the region, …
Green Building Rating Systems And The Role Of The Project Manager, Davis Ciprikis
Green Building Rating Systems And The Role Of The Project Manager, Davis Ciprikis
Other Resources
Sustainable development has increased significantly over the last 10 years. Construction firms are adopting sustainable practices that come from both, internal and external drivers of the construction industry. In order to assess how sustainable a building is, a green building rating systems have been developed to provide a documented and systematic approach to sustainable construction practices. Amongst these rating systems are the Building Research Establishment Environmental Assessment Methods (BREEAM) introduced in the UK and the Leadership in Energy and Environmental Design (LEED) created in the USA. It has been noted that the project manager will have an important role to …
Thermal Mass Behaviour Of Concrete Panels Incorporating Phase Change Materials, Dervilla Niall, Roger West, Sarah Mccormack, Oliver Kinnane
Thermal Mass Behaviour Of Concrete Panels Incorporating Phase Change Materials, Dervilla Niall, Roger West, Sarah Mccormack, Oliver Kinnane
Conference papers
Phase Change Materials (PCM) have been incorporated into a range of building envelope materials with varied success. This study investigates two different methods of combining concrete and phase change materials to form PCM/concrete composite panels. The first method involves adding microencapsulated paraffin to fresh concrete during the mixing process. The second method involves vacuum impregnating butyl stearate into lightweight aggregate which is then included in the concrete mix design. The primary aim of the study is to determine which method is the most effective way to improve the thermal mass characteristics of a concrete panel in the context of a …
Umass Amherst Green Building Guidelines V.2 And Leedv4, Kylie A. Landrey, Ted Mendoza, Ludmilla Pavlova-Gillham, Mohamad Farzinmoghadam, Somayeh Tabatabaee, Nariman Mostafavi, Ray Kinoshita Mann, Jeffrey Dalzell, Ajla Aksamija
Umass Amherst Green Building Guidelines V.2 And Leedv4, Kylie A. Landrey, Ted Mendoza, Ludmilla Pavlova-Gillham, Mohamad Farzinmoghadam, Somayeh Tabatabaee, Nariman Mostafavi, Ray Kinoshita Mann, Jeffrey Dalzell, Ajla Aksamija
Campus Planning Reports and Plans
Facilities & Campus Services supports sustainability and energy conservation initiatives by providing in-house resources to campus staff as well as designers, contractors and other consultants working with the University. The UMass Amherst Green Building Guidelines v2 and LEED v4 provide a framework for approaching new construction and major renovation projects at UMass Amherst that are undergoing LEED v4 certification by focusing the conversation on those green building aspects that are most important to the campus. They are intended to be the beginning of a dynamic conversation between designers, environmental consultants and constructors, university stakeholders, and users of new high performance …
Student Absenteeism And The Comparisons Of Two Sampling Procedures For Culturable Bioaerosol Measurement In Classrooms With And Without Upper Room Ultraviolet Germicidal Irradiation Devices, Chunxiao Su, Josephine Lau, Shawn G. Gibbs
Student Absenteeism And The Comparisons Of Two Sampling Procedures For Culturable Bioaerosol Measurement In Classrooms With And Without Upper Room Ultraviolet Germicidal Irradiation Devices, Chunxiao Su, Josephine Lau, Shawn G. Gibbs
Durham School of Architectural Engineering and Construction: Faculty Publications
Upper room ultraviolet germicidal irradiance (UVGI) has been shown to reduce the concentration of bioaerosols in controlled chambers. However, there is a lack of experimental results on the reduction of bioaerosol concentrations by UVGI devices in actual uncontrolled buildings. This study was carried out in an American elementary school in the Midwest. Two sampling procedures were carried out in six selected classrooms with similar dimensions that were separated into two groups: (1) UVGI exposure group and (2) non-UVGI control group. Two-stage Tisch culturable impactors were utilized to collect airborne culturable bacteria and fungi. Monthly samples were collected during unoccupied period …
A Need For Evidence-Based And Multidisciplinary Research To Study The Effects Of The Interaction Of School Environmental Conditions On Student Achievement, Josephine Lau, Lily M. Wang, Clarence E. Waters, James A. Bovaird
A Need For Evidence-Based And Multidisciplinary Research To Study The Effects Of The Interaction Of School Environmental Conditions On Student Achievement, Josephine Lau, Lily M. Wang, Clarence E. Waters, James A. Bovaird
Durham School of Architectural Engineering and Construction: Faculty Publications
With funding from the U.S. Environmental Protection Agency’s (EPA) Healthy Schools initiative, a research team from the University of Nebraska– Lincoln (UNL) is currently working on establishing how environmental conditions in K-12 school buildings impact student scholastic achievement. The objectives of the research project are: (1) to study comprehensively the impacts of a wide set of indoor environmental factors (including indoor air quality, thermal, lighting and acoustic conditions) on student achievement; (2) to investigate how these environmental conditions interact with each other to impact student achievement; (3) to rank order the environmental variables in terms of their relative impact on …
Fault Detection And Diagnosis Process For Oversizing Design On Multiple Packaged Air-Conditioning Units, Denchai Woradechjumroen, Haorong Li, Thanapat Promwattanapakee
Fault Detection And Diagnosis Process For Oversizing Design On Multiple Packaged Air-Conditioning Units, Denchai Woradechjumroen, Haorong Li, Thanapat Promwattanapakee
Durham School of Architectural Engineering and Construction: Faculty Publications
Heating, ventilation, air-conditioning and Refrigeration (HVAC&R) systems are seldom designed or commissioned properly. The situation leads to abrupt or degradation faults resulting in inefficient energy uses, excessive energy consumption and high service costs. To solve these aforementioned problems, fault detection and diagnosis (FDD) is utilized to firstly detect any abnormal conditions of a system and then diagnoses and determines their causes. In order to apply this concept in HVAC oversizing designs, this paper proposes the state-of-art procedure of a FDD procedure for analyzing the inherently faulty design (oversizing) of multiple packaged air-conditioning units used to supply cooling for an open …
Development Of Coordination Control For Multiple Rooftop Units, Denchai Woradechjumroen, Haorong Li, Akekachai Deesiri
Development Of Coordination Control For Multiple Rooftop Units, Denchai Woradechjumroen, Haorong Li, Akekachai Deesiri
Durham School of Architectural Engineering and Construction: Faculty Publications
Rooftop Units (RTUs) have been widely applied in providing space heating and cooling for commercial buildings. In total, they serve over 60% of the commercial building floor space in the U.S. Even through the current control approaches of a RTU can maintain the zone temperature corresponding to a set point temperature, it performs inefficiently due to several factors such as limited sensing capability, non- coordinated local control, inherent oversizing effects and so on. In addition to unnecessary power consumptions, the current control and operation technology on RTUs also lead to the space humidity problem, equipment efficiency degradation, and premature failure. …
Cognitive Radio For Smart Grid With Security Considerations, Khaled Shuaib, Ezedin Barka, Nedaa Al Hussien, Mohammed Abdel-Hafez, Mahmoud Alahmad
Cognitive Radio For Smart Grid With Security Considerations, Khaled Shuaib, Ezedin Barka, Nedaa Al Hussien, Mohammed Abdel-Hafez, Mahmoud Alahmad
Durham School of Architectural Engineering and Construction: Faculty Publications
In this paper, we investigate how Cognitive Radio as a means of communication can be utilized to serve a smart grid deployment end to end, from a home area network to power generation. We show how Cognitive Radio can be mapped to integrate the possible different communication networks within a smart grid large scale deployment. In addition, various applications in smart grid are defined and discussed showing how Cognitive Radio can be used to fulfill their communication requirements. Moreover, information security issues pertained to the use of Cognitive Radio in a smart grid environment at different levels and layers are …
Compressor Having A Control And Dagnostic Module, Hung M. Pham, Fadi M. Alsaleem
Compressor Having A Control And Dagnostic Module, Hung M. Pham, Fadi M. Alsaleem
Durham School of Architectural Engineering and Construction: Faculty Publications
An apparatus includes a Voltage sensor, a current sensor, and a controller. The Voltage sensor measures Voltage values of alternating current power Supplied to a capacitor. The capaci tor is electrically coupled to a compressor. The current sensor measures current values of the alternating current power. The controller is configured to receive the Voltage values and the current values. The controller is configured to determine a first power factor value based on at least one of the voltage values and at least one of the current values. The controller is configured to selectively detect a first capacitor fault in response …
A Prediction Method For Overall Economic Value Of Fault Detection And Diagnostic Tools For Rooftop And Split Systems, David Yuill, James Braun
A Prediction Method For Overall Economic Value Of Fault Detection And Diagnostic Tools For Rooftop And Split Systems, David Yuill, James Braun
Durham School of Architectural Engineering and Construction: Faculty Publications
Fault detection and diagnostics (FDD) tools for air-conditioning application may perform well or poorly, but it is difficult to characterize this performance in a meaningful way. Some recently proposed evaluation techniques have provided various statistics to characterize FDD performance, but these results can be difficult for a potential adopter of FDD to understand. A new method of characterizing FDD performance by predicting the overall economic value of the FDD tool is proposed in this paper. It is applicable to FDD tools intended for air-cooled unitary airconditioners, such as rooftop units (RTU) and split systems. The method gives an estimated dollar …
Normalized Effect Of Condenser Fouling And Refrigerant Charge On Performance Of Vapor Compression Air Conditioning Systems, Mehdi Mehrabi, David Yuill
Normalized Effect Of Condenser Fouling And Refrigerant Charge On Performance Of Vapor Compression Air Conditioning Systems, Mehdi Mehrabi, David Yuill
Durham School of Architectural Engineering and Construction: Faculty Publications
Several laboratory experiments have studied the effect of faults on vapor compression cycle air-conditioning systems. There has been a particular focus on refrigerant charge variation, which is believed to be quite common in air conditioners, and a lesser focus on heat exchanger fouling. The majority of the published results evaluate the fault effects on particular system operating parameters in one unit. For example, the effect on capacity and efficiency are typically evaluated. The results differ from one study to the next. The current paper summarizes the effects for all of the results available in the literature for condenser fouling and …
Fault Diagnosis Of Refrigerant Charge Based On Pca And Decision Tree For Variable Refrigerant Flow Systems, Jiangyan Liu, Huanxin Chen, Jiangyu Wang, Guannan Li, Haorong Li, Wenju Hu
Fault Diagnosis Of Refrigerant Charge Based On Pca And Decision Tree For Variable Refrigerant Flow Systems, Jiangyan Liu, Huanxin Chen, Jiangyu Wang, Guannan Li, Haorong Li, Wenju Hu
Durham School of Architectural Engineering and Construction: Faculty Publications
Variable refrigerant flow (VRF) systems are easily subjected to performance degradation due to refrigerant leakage, mechanical failure or improper maintenance after years of operation. Ideal VRF systems should equip with fault detection and diagnosis (FDD) program to sustain its normal operation. This paper presents the fault diagnosis method for refrigerant charge faults of variable refrigerant flow (VRF) systems. It is developed based on the classification and regression tree (CART) algorithm. Data of the experimental VRF system is used to test the advantages of the CART method. Results show that the decision tree can achieve desirable diagnosis efficiency on undercharge faults, …