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txspace.tamu.edu 檢索結果共 5447 筆,本頁資料從第 157 筆到第 168 筆

Four Texas water supplies (Lake Somerville, Lake Livingston, Neches River, and Sabine River) were surveyed to determine their tendency to form trihalomethanes when chlorinated. The ability of conventional and innovative treatment processes to reduce the level of trihalomethane formation potential (THMFP) in these waters was also investigated. Conventional alum coagulati....

By P. Yang,J. D. Shannon,B. Batchelor--Texas Water Resources Institute--2007-12-04
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High frequency irrigation implies the uniform, frequent application of water to crops. The fequency may range from several irrigations per week to daily irrigation to even several irrigations per day in greenhouse and nursery settings. Most of the high frequency irrigation in the United States is through necessity; i.e., the limited water holding capacity of the soils o....

By M. J. McFarland,D. L. Redden,R. J. Newton,K. W. Brown,T. A. Howell--Texas Water Resources Institute--2007-12-04
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Contaminant transport in hydrogeologic systems requires knowledge of transmissivity, storage coefficient, and dispersivity. Techniques for evaluating transmissivity and storage coefficient under field conditions are well known. However, the evaluation of dispersivity under field conditions is a costly and time consuming job. The process of transporting a specific conse....

By D. L. Redden,C. Chin--Texas Water Resources Institute--2007-12-04
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The suitability of water for irrigation depends upon many factors, of primary concern is the quantity and quality of salts present in the water Ayers and Wescot1. If total dissolved solids in the irrigation water are too high, salts accumulate in the crop root zone to the extent that yields are reduced. Excessive soil salinity means the crops have difficulty extracting ....

By W. G. McCully,D. J. Bordovsky,J. R. Runkles,B. W. Hipp,C. J. Gerard--Texas Water Resources Institute--2007-12-04
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The purpose of this study was to quantify the benefits of using a wind energy system for irrigation. The value of wind energy was estimated on both a static basis (where the annual value of wind power was assumed to be constant over the life of the machine) and on a temporal basis (where the annual value of wind power was estimated recursively). The model for static an....

By R. D. Lacewell,D. C. Hardin--Texas Water Resources Institute--2007-12-04
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Optimization of the static pressure reset is always critical in the pursuit of maximum savings of fan power and thermal energy consumption in a VAV system. This paper theoretically investigated three static pressure reset methods, i.e. VAV terminal unit damper position based, outside air temperature based and air flow based, and proposed an optimal static pressure reset....

By K. Zheng,H. Li,H. Yang--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Air infiltration has a significant impact on the heating and cooling loads of small office and residential buildings. In a radiantly heated and cooled office, air infiltration normally determines whether this type of system can operate without condensation on the radiant cooling surface in summer, because infiltration may bring considerable moisture into the space. The ....

By X. Gong,D. E. Claridge,D. H. Archer--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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This paper describes a methodology to determine potential energy savings of buildings with limited information. This methodology is based upon the simplified energy analysis procedure of heating, ventilation and air condition (HVAC) systems and the control of comfort conditions. Numerically, the algorithm is a tailored, exhaustive search of all the independent variables....

By J. C. Baltazar,D. E. Claridge--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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This paper analyzes the impact of chilled water flow and its distribution on energy efficiency and comfort quality, using the results of a field study conducted for a central cooling production system during 2006 in Kuwait. The paper identifies design and operational inefficiencies and measures their impact in deteriorating the energy efficiency and comfort quality thro....

By G. P. Maheshwari,A. E. Hajiah,A. I. ElSherbini--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Façade heating is a special application of radiant heating and cooling technology and is used to enhance the indoor comfort level of offices, hotels and museums. Mullion radiators are typically used to implement façade heating. This paper analyzes the heat transfer process of facade heating (mullion radiators) in a pilot research project in Pittsburgh, PA. The heat t....

By D. H. Archer,D. E. Claridge,X. Gong--Texas A&M University (http://www.tamu.edu):Energy Systems Laboratory (http://esl.tamu.edu)--2007-12-01
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Various existing HVAC system simulation programs and visualization tools are considered to be potentially powerful tools for commissioning. Although not originally developed as commissioning tools, these programs facilitate the confirmation/comparison of HVAC system function and performance and enable detailed analysis of parameters influencing HVAC system performance. ....

By M. Zheng,S. Pan--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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Since 2005, CIPP of New York Energy Smart has waived the monitoring requirement for lighting projects with small projected savings that are 600,000 kWh/yr or less. There is potential to further increase the threshold savings with additional administrative efficiencies, but also with increased risk that the estimated savings may not be realized. This paper presented a ri....

By G. Tan,S. Gogte,D. Gowans--Energy Systems Laboratory (http://esl.tamu.edu):Texas A&M University (http://www.tamu.edu)--2007-12-01
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