Engineering Commons^™

Improved Duct Systems Task Report With Stagegate 2 Analysis, Florida Solar Energy Center, Neil Moyer

FSEC Energy Research Center®

The Building America Industrialized Housing Partnership's work with two industry partners, Cavalier Homes and Southern Energy Homes, in constructing and evaluating prototype interior duct systems will be summarized. Issues of energy performance, comfort, DAPIA approval, manufacturability and cost will be addressed. A stage gate 2 analysis will address the current status of project showing that there are still refinements needed to the process of incorporating all of the ducts within the air and thermal boundaries of the envelope.

Orange County Convention Center Energy Analysis And Energy Information System, Florida Solar Energy Center, Charles Withers, Jr.

FSEC Energy Research Center®

The Orange County Convention Center (OCCC) has the 2nd largest convention facility utilization in the nation. Two primary buildings provide about seven million square feet of conditioned space to approximately 1.5 million visitors per year. In efforts to reduce energy conservation, OCCC began implementing several energy conservation measures beginning in 2005 and continuing over the last 2 years with plans to continue additional efforts in the future. An analysis of monthly chilled water and electricity used by the West and North/South Buildings has been completed in an effort to investigate reductions in energy use resulting from conservation measures. This final …

Experimental Verification Of Source Temperature Modulation Via A Thermal Switch In Thermal Energy Harvesting, Robin Mccarty, D. Monaghan, Kevin P. Hallinan, Brian Sanders

Mechanical and Aerospace Engineering Faculty Publications

This paper provides a description of research seeking to experimentally verify the effectiveness of a thermal switch used in series with TE devices for waste heat recovery for constant and variable source heat input and for variable source thermal capacitance (mass). Using an experimental set-up comprised serially of a fixed heat source, a variable thermal resistance air gap serving as a thermal switch, a thermoelectric device and a heat sink, the time-averaged power output to power input ratios improved up to 15% and 30% respectively for constant and variable heat input in certain design space conditions. The experimental results, as …

Experimental Study Of Coal Pyrolysis And Gasification In Association With Syngas Combustion, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Commissioning High Performance Residences In Hot, Humid Climates, Florida Solar Energy Center, Ken Fonorow

FSEC Energy Research Center®

Since 2001, the authors have engaged several builders in the Gainesville, FL area to build over 500 high performance new energy efficient homes in multiple sub divisions. The builders keep building to increased levels of energy efficiency. Each home is individually designed, inspected, rated and commissioned for optimum performance. This paper summarizes the experiences to date with two production builders who have cost shared with the Building America program to deliver these outstanding results. Keys to success are commitment from the final decision maker; scopes of work for subcontractors with specific performance criteria; clear communication with the trades often accompanied …

Closing The Gap: Getting Full Performance From Residential Central Air Conditioners. Task 4.2-Develop New Climate-Sensitive Air Conditioner, Design, Construction, And Testing., Florida Solar Energy Center, Don B. Shirey Iii

FSEC Energy Research Center®

This study evaluated the performance of a prototype air conditioning system. The configuration of the prototype was based on detailed simulation results performed as part of this study. The results of the previously completed simulation indicated that energy-efficient, properly-ventilated homes in humid climates need equipment options or configurations that can provide a modest amount of additional dehumidification capacity while coordinating their operation with conventional cooling and ventilation systems. A prototype air conditioning system was constructed using currently available components and provides a method to independently control sensible (temperature) and latent (moisture) building loads. The prototype system was tested in both …

Characterization Of Water Gas Shift Reaction In Association With Carbon Dioxide Sequestration, Wei-Hsin Chen

Wei-Hsin Chen

Review Of Chilled Water And Electric Energy Use At The West And North/South Buildings Of The Orange County Convention Center, Florida Solar Energy Center, Charles Withers, Jr.

FSEC Energy Research Center®

The Orange County Convention Center (OCCC) has the 2nd largest convention facility utilization in the nation. Two primary buildings provide about seven million square feet of conditioned space to one million visitors per year. In efforts to reduce energy conservation, OCCC began implementing several energy conservation measures beginning in 2005 and continuing over the last 2 years with plans to continue additional efforts in the future. Examples of the types of energy conservation involved changing lighting and HVAC schedules and control methods, replacement of motors with higher efficiency, and turning off power to other unused equipment. An analysis of monthly …

A Simplified Hot Water Distribution System Model, Florida Solar Energy Center, Lixing Gu

FSEC Energy Research Center®

Water heating in the U.S. has been identified as a major component of total energy consumption used in buildings, mostly coming from the residential sector at around 11%. A potential opportunity for energy savings in water heating systems is to improve the design of hot water distribution systems (HWDS). Due to the complex heat losses of HWDS, models are needed to optimize HWDS by reducing heat losses. There are three models currently used to simulate thermal performance of hot water distribution systems (HWDS): HWSim, ORNL-HWDS, and TRNSYS. The first two models are used to study hot water distribution systems only …

Airflow Network Modeling In Energyplus, Florida Solar Energy Center, Lixing Gu

FSEC Energy Research Center®

The airflow network model in EnergyPlus provides the ability to simulate multizone wind-driven airflows. The model is also able to simulate the impacts of forced air distribution systems, including supply and return air leaks. The air distribution system portion of the model is currently applicable for constant-air-volume systems. Future enhancements will include adding hybrid ventilation control and possible extension to include variable-air-volume distribution systems.

This paper describes the input objects, calculation procedures, model validation, and example results. The model inputs consist of five main objects: simulation control, multizone data, node data, component data, and linkage data. The model calculates pressure …

Understanding And Optimizing Surfaces And Interfaces In Energy Conversion Devices, Clemens Heske

UNLV Renewable Energy Symposium

This inaugural event is dedicated to showcasing the renewable/sustainable energy projects of UNLV faculty, staff, students, and collaborators, as well as other external projects underway statewide and nationally. The development and utilization of new technologies to protect the environment, achieve energy independence, and strengthen the economy will be explored. Speakers and poster-session presenters will provide further insight to many ongoing projects and innovative research ideas.

Organized by UNLV’s Office of Strategic Energy Programs, the event offers participants the opportunity to learn about energy projects and will encourage networking and collaboration. This symposium is intended for researchers, educators, students, policy makers, …

Introducing New Engineering Students To Mechanical Concepts Through An “Energy Cube” Project, Micheal O'Flaherty, Shannon Chance, Fionnuala Farrell, Christopher Montague

Conference papers

The objective of this paper is to describe a problem based learning module, called the “Energy Cube”, offered by Technological University Dublin that is designed to teach mechanical, building services and manufacturing engineering concepts to first year engineering students.

The Energy Cube project gives students hands-on experience in areas ranging from heat transfer, lighting and energy efficiency to industrial and product design. In the Energy Cube, students design and construct (using cardboard, clear plastic, and glue) a model of a building that admits as much daylight as possible while being energy efficient and aesthetically pleasing.

The students, working in teams …

Introducing New Engineering Students To Mechanical Concepts Through An “Energy Cube” Project, Micheal P. O'Flaherty, Shannon Chance, Fionnuala Farrell, Chris Montague

Shannon M. Chance

The objective of this paper is to describe a problem based learning module, called the “Energy Cube”, offered by Dublin Institute of Technology that is designed to teach mechanical, building services and manufacturing engineering concepts to first year engineering students. The Energy Cube project gives students hands-on experience in areas ranging from heat transfer, lighting and energy efficiency to industrial and product design. In the Energy Cube, students design and construct (using cardboard, clear plastic, and glue) a model of a building that admits as much daylight as possible while being energy efficient and aesthetically pleasing. The students, working in …

Solar 2007: Florida's Emergency Shelters Go Solar, Florida Solar Energy Center, William Young

FSEC Energy Research Center®

Florida has its fair share of dangerous weather conditions including hurricanes, tornados and floods. Florida legislature passed various laws and made revisions addressing disaster planning which required that the Department of Education, in consultation with school boards and county and state emergency management offices, develop design standards for public shelters to be incorporated into State Requirements for Educational Facilities.

Last year, Solar for Schools, a state program, provided funds to put photovoltaic systems on schools that are classified as shelters, adding a new dimension to the educational program. Middleton High School is an example of an application to power the …

Industrial Solid-State Energy Harvesting: Mechanisms And Examples, Matthew Kocoloski, Carl Eger, Robin Mccarty, Kevin P. Hallinan, J. Kelly Kissock

Mechanical and Aerospace Engineering Faculty Publications

This paper explores the potential for solid-state energy harvesting in industrial applications. In contrast to traditional heat recovery, the output of solid-state devices is electricity, which can be readily used in virtually any plant. The progress in harvesting waste heat via thermoelectric and thermionic generators is described. With second law efficiencies now approaching 50% and 80% respectively, we show that these technologies are on the cusp of practical use. Finally, we present an example of energy harvesting using thermionic devices in an industrial application. The example considers energy harvesting from a furnace at a glass manufacturing facility where exhaust gases …

Volatile Release And Particle Formation Characteristics Of Injected Pulverized Coal In Blast Furnaces, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Transient Gasification And Syngas Formation From Coal Particles In A Fixed-Bed Reactor, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Performances Of Pulverized Coal Injection In Blowpipe And Tuyere At Various Operational Conditions, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

2 - تفکيک دامنة عملکرد ترموستاتهاي دماي داخل ساختمان بر اساس معيارهاي آسايش حرارتي فصلي؛ رهيافتي مؤثر در اقتصاد انرژي, Omidvar Amir, Alireza Zolfaghari, Mehdi Maerefat

Dr Alireza Zolfaghari

No abstract provided.

Ucf Recommissioning Project Final Report, Florida Solar Energy Center, James Cummings

FSEC Energy Research Center®

A research project was carried out to examine the energy savings which occurred from recommissioning three University of Central Florida buildings. Recommissioning activities completed in two of the three buildings yielded chilled water and whole building electricity savings on the order of 15% to 30%. Recommissioning implementation is pending in the third building, where savings are projected to be in the range of 40% to 50% of total building energy use. Additionally, cooling energy savings were monitored (and calculated) for a green roof installation at one of these three buildings. Calculated savings were found to be 1.05 kWh/day for a …

Effectiveness Of Florida's Residential Energy Code: 1979 - 2007, Florida Solar Energy Center, Philip Fairey

FSEC Energy Research Center®

No abstract provided.

1 - لزوم بومي سازي استانداردهاي آسايش حرارتي در ساختمان و تأثير آن بر اقتصاد انرژي, Amir Omidvar, Alireza Zolfaghari, Mehdi Maerefat

Dr Alireza Zolfaghari

No abstract provided.

Subsidies For Energy Efficiency Improvements: Theory And Practice, Theodoros Zachariadis

Theodoros Zachariadis

No abstract provided.

A Simplified Model Of Predicting Coal Reaction In A Partial Oxidation Environment, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Closing The Gap: Getting Full Performance From Residential Central Air Conditioners, Task 4 - Develop New Climate-Sensitive Air Conditioner, Simulation Results And Cost Benefit Analysis, Florida Solar Energy Center, Hugh Henderson, Jr.

FSEC Energy Research Center®

This study evaluated the impacts of conventional and advanced cooling and dehumidification equipment on residential indoor humidity levels and annual energy consumption using whole building computer simulations. The life-cycle cost premium for the various advanced systems was also estimated. Building models were developed for a standard HERS Reference house, meant to represent current residential construction practice, and a High-Efficiency house that would likely qualify for a federal tax credit. The different houses were simulated in seven southeastern U.S. cities and with two ventilation/infiltration scenarios: 1) variable or natural infiltration alone, and 2) mechanical ventilation that complied with ASHRAE Standard 62.2-2004. …

Mitigating The Impacts Of Uncontrolled Air Flow On Indoor Environmental Quality And Energy Demand In Non-Residential Buildings, Florida Solar Energy Center, Hugh Henderson, Jr.

FSEC Energy Research Center®

This project builds on previous field research in Florida that has demonstrated the significant impact that uncontrolled air flows (UAFs) have on indoor environmental quality (IEQ) and energy use in small commercial buildings, a large but poorly understood segment of the nation's building stock. The goal of this project was to extend that research to a national scale by assessing the importance of UAFs in a sample of 25 commercial buildings in New York State. The differences in climate and construction techniques between New York and Florida are expected to bound the range conditions typically found on a national basis. …

Priorities For Energy Efficiency For Home Construction In Florida, Florida Solar Energy Center, Robin Vieira

FSEC Energy Research Center®

Below we provide the priorities for obtaining an energy efficient building in Florida.

Extinction Of Counterflow Diffusion Flames With Radiative Heat Loss And Nonunity Lewis Numbers, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.

Experimental Evaluation Of Nightcool Nocturnal Radiation Cooling Concept: Performance Assessment In Scale Test Buildings, Florida Solar Energy Center, Danny Parker

FSEC Energy Research Center®

An experimental test evaluation has been conducted of a night sky cooling system designed to substantially reduce space cooling needs in homes in North American climates. The system uses a sealed attic covered by a highly conductive metal roof (a roof integrated radiator) which is selectively linked by air flow to the main zone with the attic zone to provide cooling- largely during nighttime hours. Available house mass is used to store sensible cooling. Additional dehumidification is done during the evening hours as warranted by interior conditions.

A previous report describes a detailed simulation model of the relevant night cooling …

Creating Sustainable Affordable Housing Stock Using Smart Growth Model, B Bakhtyar

B Bakhtyar

Many low-income people are trapped into paying high rental for low quality housing. It becomes impossible for them to save any down payment for purchasing a home. With the need to house 709,400 units where 38.2% is for low- and low-medium houses in the Ninth Malaysian Plan (9MP), the growing and shifting population is creating demands for new housing in some areas while decreasing demands for new and existing housing in another. The state of Selangor and Kuala Lumpur require 23.7% of new housing units to cater to its growing population in the 9MP. Inflation and other factors have brought …