Thermal Performance Analysis Of A Solar Water Heating System With Heat Pipe Evacuated Tube Collector Using Data From A Field Trial,
2013
Technological University Dublin
Thermal Performance Analysis Of A Solar Water Heating System With Heat Pipe Evacuated Tube Collector Using Data From A Field Trial, Lacour Ayompe, Aidan Duffy
Articles
This paper presents an analysis of the thermal performance of a solar water heating system with heat pipe evacuated tube collector using data obtained from a field trial installation over a year in Dublin, Ireland. An automated sub‐system was developed and incorporated to control the hot water draw‐offs and electric immersion heater to mimic the operation of solar water heating systems in domestic dwellings. The maximum recorded collector outlet fluid temperature was 70.3oC while the water temperature at the bottom of the hot water tank was 59.5oC. The annual average daily energy collected was 20.4 MJd …
Assessment Of Potential Carbon Dioxide-Based Demand Control Ventilation System Performance In Single Zone Systems,
2013
Air Force Institute of Technology
Assessment Of Potential Carbon Dioxide-Based Demand Control Ventilation System Performance In Single Zone Systems, Joseph G. Pickenpaugh
Theses and Dissertations
Heating, ventilation, and air conditioning (HVAC) use accounts for 43% of commercial energy consumption, with close to 5% used for ventilation purposes. Federal government agencies face both energy consumption reduction mandates and reduced funding. Carbon dioxide (CO2) based demand control ventilation (DCV) is a technology that allows for reduced energy consumption by allowing facility designers to introduce outside air based on facility occupancy, per American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) standards. This research aims to create a generalized methodology assessing energy and cost reductions from CO2-based DCV and then apply it to a specific facility at …
Mutcd Revisions And Sign Upgrades,
2013
The Schneider Corporation
Mutcd Revisions And Sign Upgrades, Jill Palmer, Karen Stippich
Purdue Road School
Jill Palmer, PE has managed over a dozen sign inventories in response to new MUTCD requirements for retroreflectivity. This presentation shares lessons gleaned from that experience and a practical approach to satisfying the MUTCD criteria.
Preparing Nebraska Future Water Leaders: Nwla Academy Class Iii (2013),
2013
University of Nebraska-Lincoln Extension
Preparing Nebraska Future Water Leaders: Nwla Academy Class Iii (2013), Connie I. Reimers-Hild
Nebraska Water Leaders Academy: Publications and Materials
Group communications, Phyllis Schoenholz, UNL
Communication and transformational leadership. Dr. Mark Burbach and Dr. Connie Reimers-Hild, UNL
Nebraska's instream flow laws and applications, Ann Bleed, board member, Lower Platte Natural Resources District
River Basin Compacts; Nebraska's obligations, Michael Jess, water resources engineer; consultant.
Conservation along the Central Platte, Mark Peyton, senior biologist, Central Nebraska Public Power and Irrigation District
Central Platte River water issues in regard to habitat for endangered species, Jason Farnsworth, natural resources specialist, Headwaters Corporation & Jerry Kenny, executive director of the Platte River Recovery Implementation Program
Rowe Sanctuary; discussion and viewing …
2013 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work,
2013
Lyles School of Civil Engineering
2013 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Indiana Ltap
Indiana Local Technical Assistance Program (LTAP) Directory
Contact information for local agency officials and employees responsible for Indiana’s local road infrastructure.
Transient And Quasi-Steady Thermal Behaviour Of A Building Envelope Due To Retrofitted Cavity Wall And Ceiling Insulation,
2013
Technological University Dublin
Transient And Quasi-Steady Thermal Behaviour Of A Building Envelope Due To Retrofitted Cavity Wall And Ceiling Insulation, Aimee Byrne, Gerard Byrne, Anna Davies, Anthony Robinson
Articles
Accurate understanding of the thermal behaviour of building components is essential for predicting heat-ing or cooling needs and facilitates the implementation of more successful energy saving strategies and retrofits. This paper focuses on a specific measure commonly introduced through the residential energy efficiency retrofit programmes in Ireland–insulation. Traditionally, assessments of the performance of building envelopes have been based on assumed thermal resistances of the materials involved, labora-tory tests and computer modelling. The aim of the present work is to investigate the in situ thermal behaviour of a case study building and its components under transient and quasi-steady environmental conditions, comparing …
Variability Of Extreme Precipitation In Coastal River Basins Of The Southern Mexican Pacific Region,
2013
Centro de Investigacion Cientifica y de Educacion Superior de Ensenada
Variability Of Extreme Precipitation In Coastal River Basins Of The Southern Mexican Pacific Region, Nancy Perez-Morga, Thomas Kretzschmar, Tereza Cavazos, Stephen V. Smith, Francisco Munoz-Arriola
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Extreme wet and dry years (± 1 standard deviation, respectively), as well as the top 95 percentile (P95) of daily precipitation events, derived from tropical cyclone (TC) and nontropical cyclone (NTC) rainfall, were analyzed in coastal river basins in Southern Oaxaca, Mexico (Río Verde, Río Tehuantepec, and the Southern Coast). The study is based on daily precipitation records from 47 quality-controlled stations for the 1961 to 1990 period and TC data for the Eastern Tropical Pacific (EPAC). The aim of this study was to evaluate extreme (dry and wet) trends in the annual contribution of daily P95 precipitation events and …
Runoff Nutrient Transport As Affected By
Land Application Method, Swine Growth Stage,
And Runoff Rate,
2013
Research Agricultural Engineer, USDA-ARS, Lincoln, Nebraska
Runoff Nutrient Transport As Affected By Land Application Method, Swine Growth Stage, And Runoff Rate, J. E. Gilley, Shannon L. Bartelt-Hunt, S. J. Lamb, X. Li, D. B. Marx, D. D. Snow, D. B. Parker, B. L. Woodbury
Department of Agricultural and Biological Systems Engineering: Faculty Publications
This study was conducted to measure the effects of slurry application method, swine growth stage, and flow rate on runoff nutrient transport. Swine slurry was obtained from production units containing grower pigs, finisher pigs, or sows and gilts. The swine slurry was applied using broadcast, disk, or injection methods at a rate required to meet annual nitrogen requirements for corn. Three 30 min simulated rainfall events, separated by 24 h intervals, were applied to the experimental plots at an intensity of 70 mm h-1. Inflow was applied at the top of each plot in four successive increments after …
Hourly And Daily Single And Basal
Evapotranspiration Crop Coefficients As A Function
Of Growing Degree Days, Days After Emergence,
Leaf Area Index, Fractional Green Canopy
Cover, And Plant Phenology For Soybean,
2013
University of Nebraska-Lincoln
Hourly And Daily Single And Basal Evapotranspiration Crop Coefficients As A Function Of Growing Degree Days, Days After Emergence, Leaf Area Index, Fractional Green Canopy Cover, And Plant Phenology For Soybean, Suat Irmak, Lameck O. Odhiambo, James Specht, Koffi Djaman
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Hourly evapotranspiration (ET) crop coefficients (Kc) are needed to optimize the effectiveness and efficiency of high-frequency micro- and sprinkler irrigation practices involving the application of water multiple times a day. However, not much is known about the daily and seasonal patterns and magnitudes in hourly Kc values for soybean. In addition, locally developed Kc values are necessary for more robust within-season irrigation management, crop ET estimation, and water balance analyses. Hourly and daily Kc functions were developed for soybean in south-central Nebraska through extensive field research. Actual crop evapotranspiration (ETa) was measured using a …
Transferability Of Jarvis-Type Models Developed And
Re-Parameterized For Maize To Estimate Stomatal
Resistance Of Soybean: Analyses On Model Calibration,
Validation, Performance, Sensitivity, And Elasticity,
2013
University of Nevada, Reno, Nevada
Transferability Of Jarvis-Type Models Developed And Re-Parameterized For Maize To Estimate Stomatal Resistance Of Soybean: Analyses On Model Calibration, Validation, Performance, Sensitivity, And Elasticity, Denis Mutiibwa, Suat Irmak
Department of Agricultural and Biological Systems Engineering: Faculty Publications
In a previous study by the same authors, a new modified Jarvis model (NMJ-model) was developed, calibrated, and validated to estimate stomatal resistance (rs) for maize canopy on an hourly time step. The NMJ-model’s unique subfunctions, different from the original Jarvis model (J-model), include a photosynthetic photon flux density
(PPFD)-rs response subfunction developed from field measurements and a new physical term, Aexp(1/LAI), where A is the minimum stomatal resistance and LAI is the green leaf area index, to account for the influence of canopy development on rs, especially during partial canopy stage in the early season and …
Impact Of Water And Nitrogen Management
Strategies On Maize Yield And Water Productivity
Indices Under Linear-Move Sprinkler Irrigation,
2013
University of Nebraska-Lincoln
Impact Of Water And Nitrogen Management Strategies On Maize Yield And Water Productivity Indices Under Linear-Move Sprinkler Irrigation, Daran Rudnick, Suat Irmak
Department of Agricultural and Biological Systems Engineering: Faculty Publications
With uncertainty in future irrigation water availability and regulations on nutrient application amounts, experimentally determined effects of “controllable” management strategies such as nitrogen (N), water, and their combination on crop water productivity (CWP, also known as crop water use efficiency) and actual evapotranspiration (ETa) are essential. The effects of various N application rates (0, 84, 140, 196, and 252 kg ha-1) under fully irrigated (FIT), limited irrigation (75% FIT), and rainfed conditions on maize (Zea mays L.) yield and various CWP indices were investigated in 2011 and 2012 growing seasons under linear-move sprinkler irrigation in south …
Assessing Climate Change Impacts On Water Balance,
Runoff, And Water Quality At The Field Scale
For Four Locations In The Heartland,
2013
University of Nebraska-Lincoln
Assessing Climate Change Impacts On Water Balance, Runoff, And Water Quality At The Field Scale For Four Locations In The Heartland, Michael W. Van Liew, Song Feng, T. B. Pathak
Department of Agricultural and Biological Systems Engineering: Faculty Publications
This study employed the Soil and Water Assessment Tool (SWAT) to evaluate the impacts of projected future climate change scenarios on water balance, runoff, sediment, total nitrogen (N), and total phosphorus (P) at the field scale for four locations in the Heartland region: Sioux City (Iowa) and Columbus, Mullen, and Harrison (Nebraska). A conventional two-year corn-soybean rotation was assumed to be grown on each field. All fields were simulated identically in terms of topographic and cover/land management conditions. Model inputs for the fields differed in only
three ways: the forcing conditions for existing and future climatic scenarios (SRES A2, A1B, …
Evapotranspiration And Surface Energy Balance
Of A Common Reed-Dominated Riparian System
In The Platte River Basin, Central Nebraska,
2013
Makerere University
Evapotranspiration And Surface Energy Balance Of A Common Reed-Dominated Riparian System In The Platte River Basin, Central Nebraska, Isa Kabenge, Suat Irmak, John E. Gilley, George E. Meyer, Stevan Z. Knezevic, Timothy J. Arkebauer, Duane Woodward, Milton Moravek
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Quantifying actual evapotranspiration (ETa) of riparian zones is important for more robust water balance analyses that will enable better planning, managing, and allocating of water resources as well as developing strategies to protect delicate riparian ecosystem functions. The ETa, sensible heat flux (H), net radiation (Rn), soil heat flux (G), meteorological variables (air temperature, Ta; incoming shortwave radiation, Rs; wind speed, u3; relative humidity, RH; vapor pressure deficit, VPD; precipitation, etc.), and albedo were measured on an hourly time step, and leaf area index (LAI) and plant height …
Use Of A Surrogate To Evaluate The Impact Of Tillage
On The Transport Of Steroid Hormones From
Manure-Amended Agricultural Fields,
2013
University of Nebraska-Lincoln
Use Of A Surrogate To Evaluate The Impact Of Tillage On The Transport Of Steroid Hormones From Manure-Amended Agricultural Fields, Sagor Biswas, William Kranz, Charles A. Shapiro, Mitiku Mamo, Shannon L. Bartelt-Hunt, Daniel D. Snow, David P. Shelton, David D. Tarkalson, Terry L. Mader, Simon J. Van Donk, Tian C. Zhang
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Beef feedlot manure distributed to row crop production areas is a potential surface water contaminant source of the steroid hormones commonly used in beef cattle production. This article reports on research conducted at the University of Nebraska Haskell Agricultural Laboratory near Concord, Nebraska, in July 2009. Manure, collected from beef feedlot pens, was stockpiled for ten months prior to application to a row crop field. Previous research identified that the detection frequency of steroid hormones in beef manure varies greatly. Thus, a surrogate (17α-ethynylestradiol, EE2) was applied at a rate of 75 g ha-1 to ensure detectable concentrations in …
Transport Of Steroid Hormones In The Vadose Zone
After Land Application Of Beef Cattle Manure,
2013
University of Nebraska-Lincoln
Transport Of Steroid Hormones In The Vadose Zone After Land Application Of Beef Cattle Manure, Simon Van Donk, Sagor Biswas, William L. Kranz, Daniel D. Snow, Shannon L. Bartelt-Hunt, Terry L. Mader, Charles A. Shapiro, David P. Shelton, David D. Tarkalson, Tian .. Zhang, Steve Ensley
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Few studies have been conducted to investigate the potential contamination of groundwater from manureborne steroid hormones. The objective of this study was to monitor leaching of steroid hormones at the bottom of 2.4 m deep percolation lysimeters installed in plots treated with beef cattle manure. Soil samples were also collected from surrounding field plots. Treatments consisted of application of manure from two treatment methods (stockpiling and composting) or no manure application. Laboratory analyses of manure, soil, and leachate samples used liquid chromatography and tandem mass spectrometry to identify 17 steroid hormones and metabolites. Progesterone, estrone, β-zearalenol, and 4-androstenedione were detected …
Water Productivity Of Corn And Dry Bean
Rotation On Very Fine Sandy Loam
Soil In Western Nebraska,
2013
Information Technology Instructor, Business and Information Technology Division, Western Nebraska Community College, Scottsbluff, Nebraska
Water Productivity Of Corn And Dry Bean Rotation On Very Fine Sandy Loam Soil In Western Nebraska, William E. Spurgeon, C. Dean Yonts
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Subsurface drip irrigation (SDI) was used to irrigate corn and dry beans in a crop rotation study for four years from 2005 to 2008 to evaluate the accumulative effect of irrigation amount on yield and irrigation water use efficiency (IWUE). This study was conducted on a very fine sandy loam soil using a short season corn hybrid typical for the area. Four irrigation treatments based on providing a fraction of the estimated crop evapotranspiration (ETc) were evaluated. The treatments were designed to replace a certain percentage of ETc and were denoted as I125, …
Avhrr-Ndvi-Based Crop Coefficients For Analyzing Long-Term
Trends In Evapotranspiration In Relation To Changing Climate In
The U.S. High Plains,
2013
University of Nebraska-Lincoln
Avhrr-Ndvi-Based Crop Coefficients For Analyzing Long-Term Trends In Evapotranspiration In Relation To Changing Climate In The U.S. High Plains, Denis Mutiibwa, Suat Irmak
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Studies in regions of extensive irrigation practices have revealed a significant influence of evaporative cooling on regional temperatures as a result of surface energy redistribution during evaporation. In the U.S. High Plains, maximum temperatures during the last quarter of the 20th century have been decreasing. We investigated the trends in evapotranspiration (ET or latent heat) fluxes originating from increasing irrigation practices in the High Plains region from 1981 to 2008. We estimated actual ET (ETc) over the entire High Plains from the spatial crop coefficients (Kc) and spatial reference (potential) ET (ETref). We proposed …
Hydrologic Characterization Of A Rain Garden Mitigating Stormwater Runoff From A Commercial Area,
2013
University of Kentucky
Hydrologic Characterization Of A Rain Garden Mitigating Stormwater Runoff From A Commercial Area, John T. Mcmaine
Theses and Dissertations--Biosystems and Agricultural Engineering
Impervious surfaces such as roads, sidewalks, and roofs increase the volume of runoff generated in a watershed. Traditional stormwater management techniques emphasize conveyance of runoff away from impervious surfaces in order to reduce flooding. Rain gardens are becoming popular as a different means to manage stormwater in such a way that runoff is captured and infiltrated onsite rather than conveyed offsite. A stormwater management system consisting of a rainwater harvest system, rain garden, and infiltration chamber was built at the Coca-Cola Refreshments USA, Inc. distribution center in Lexington, Kentucky during the fall of 2011. Precipitation, inflow, and water level were …
Using Gis To Delineate Headwater Stream Origins In The Appalachian Coal-Belt Region Of Kentucky,
2013
University of Kentucky
Using Gis To Delineate Headwater Stream Origins In The Appalachian Coal-Belt Region Of Kentucky, Jonathan A. Villines
Theses and Dissertations--Biosystems and Agricultural Engineering
Human activity such as surface mining can have substantial impacts on the natural environment. Performing a Cumulative Hydrologic Impact Assessment (CHIA) of such impacts on surface water systems requires knowing the location and extent of these impacted streams. The Jurisdictional Determination (JD) of a stream’s protected status under the Clean Water Act (CWA) involves locating and classifying streams according to their flow regime: ephemeral, intermittent, or perennial. Due to their often remote locations and small size, taking a field inventory of headwater streams for surface mining permit applications or permit reviews is challenging. A means of estimating headwater stream location …
Use Of A Surrogate To Evaluate The Impact Of Tillage
On The Transport Of Steroid Hormones From
Manure-Amended Agricultural Fields,
2013
University of Nebraska-Lincoln
Use Of A Surrogate To Evaluate The Impact Of Tillage On The Transport Of Steroid Hormones From Manure-Amended Agricultural Fields, Sagor Biswas, William L. Kranz, Charles A. Shapiro, Mitiku Mamo, Shannon L. Bartelt-Hunt, Daniel D. Snow, David P. Shelton, David D. Tarkalson, Terry L. Mader, Simon J. Van Donk, Tian C. Zhang
Department of Agricultural and Biological Systems Engineering: Faculty Publications
Beef feedlot manure distributed to row crop production areas is a potential surface water contaminant source of the steroid hormones commonly used in beef cattle production. This article reports on research conducted at the University of Nebraska Haskell Agricultural Laboratory near Concord, Nebraska, in July 2009. Manure, collected from beef feedlot pens, was stockpiled for ten months prior to application to a row crop field. Previous research identified that the detection frequency of steroid hormones in beef manure varies greatly. Thus, a surrogate (17α-ethynylestradiol, EE2) was applied at a rate of 75 g ha-1 to ensure detectable concentrations in …
