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Dissertations / Theses on the topic 'Water efficiency'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Gay, Alanis Leon F. "Measuring Energy Efficiency of Water Utilities." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34231.

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Water infrastructure systems worldwide use large amounts of energy to operate. Energy efficiency efforts are relevant because even relatively small gains in efficiency have the potential to bring significant benefits to these utilities in terms of financial savings and enhanced sustainability and resiliency. In order to achieve higher efficiency levels, energy usage must be measured and controlled. A common tool used to measure energy efficiency in water utilities and perform comparisons between utilities is metric benchmarking. Energy benchmarking scores are intended to measure how efficient
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2

Lindner, Björn. "The black water loop : water efficiency and nutrient recovery combined /." Hamburg : GFEU, 2008. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016561528&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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3

Gurung, Thulo Ram. "Influence of Water Efficiency and Diversified Water Supply Schemes on Urban Water Infrastrucrure Planning." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367485.

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Water security is increasingly becoming a cause of concern in Australia with population growth and climate change set to exacerbate the variability of supply in both rural and urban regions. During recent drought conditions in Queensland there was a strong emphasis on water restrictions to reduce residential consumption, as well as water policy strategies such as modifying building codes to require all new residential and commercial buildings to conserve and/or substitute potable water. Additionally, there was a heightened emphasis on having an Integrated Urban Water Management (IUWM) approach
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4

Sedibe, Moosa Mahmood. "Optimising water use efficiency for crop production." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53541.

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Thesis (MScAgric)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Poor water management and poor water use efficiency (WUE) have been identified as one of the major problems experienced by vegetable growers in most of the developing countries, including South Africa. This poor management and poor utilization of water have led to a drastic decline in the quality and quantity of available water. In South Africa agriculture uses about 50% of available water. Increasing water demand for domestic, industrial and mining uses, may decrease agriculture's share to less than the current 5
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5

Brettenny, Warren James. "Efficiency evaluation of South African water service provision." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/14741.

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In recent years South Africa has experienced numerous service delivery protests. These protests are a result of the lack of delivery of basic services such as water and sanitation (amongst others). To address this, local governments have taken part in benchmarking initiatives (National Benchmarking Initiative, Municipal Benchmarking Initiative) and regulation programmes (BlueDrop,GreenDrop) in an effort to improve the quality of potable water and sanitation services. The latter of these focuses on the quality of the water services delivered and neither focus on the efficiency with which this d
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6

Sauer, Johannes. "The economics and efficiency of water supply infrastructure." Berlin Logos-Verl, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2748306&prov=M&dok_var=1&dok_ext=htm.

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7

Morgado, dos Santos Ana Maria. "Plant factors influencing water use efficiency of wheat." Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434315.

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8

Joseph, Jyothis. "Improving Photovoltaic Panel Efficiency by Cooling Water Circulation." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1404617/.

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This thesis aims to increase photovoltaic (PV) panel power efficiency by employing a cooling system based on water circulation, which represents an improved version of water flow based active cooling systems. Theoretical calculations involved finding the heat produced by the PV panel and the circulation water flow required to remove this heat. A data logger and a cooling system for a test panel of 20W was designed and employed to study the relationship between the PV panel surface temperature and its output power. This logging and cooling system includes an Arduino microcontroller extended wit
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9

Fraser, Michael B. (Michael Brent). "Analyzing the operating efficiency of autonomous water vehicles." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68838.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 29).<br>Power consumption is a huge limitation in the application of autonomous vehicles, making the need for efficient processes more important. A greater operating efficiency could extend the capabilities of missions by consuming less power and energy. This thesis analyzed the operating efficiency of a small, autonomous water craft. The results of the study showed that the most efficient operating condition is to run
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10

Bandekar, Ashish. "Electrowet Coalescence Of Water Drops In Water-ULSD Dispersion." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1490898933759055.

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11

Adiredjo, Afifuddin Latif. "Water use efficiency in sunflower : Ecophysiological and genetic approaches." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/20177/1/adiredjo.pdf.

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Water use efficiency (WUE), measured as the ratio of plant biomass to water consumption, is an essential agronomical trait for enhancing crop production under drought. Measuring water consumption is logistically difficult, especially in field conditions. The general objective of the present Thesis is to respond to three main questions: (i) can WUE be determined by using carbon isotope discrimination (CID), easy to measure?, (ii) how WUE and CID variation analysis can contribute to the genotypic selection of sunflower subjected to drought?, and (iii) can WUE variation be revealed by the variati
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12

Singh, Ajay. "Water and nitrogen use efficiency of corn (Zea mays L.) under water table management." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116989.

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Drainage and water table management are essential for crop production in humid regions. Water table management not only increases crop yield, but also reduces nitrate leaching to water bodies. This study investigated the water and nitrogen use efficiency of corn under two water management conditions and three nitrogen fertilizer levels. The sap flow heat balance method was used to measure the daily water uptake of corn, over an extended period of the growing season. The impacts of climate change on grain corn and biomass yield in eastern Canada under tile drained conditions was also evaluated
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13

Tomás, Mir Magdalena. "Physiological mechanisms involved in water use efficiency in grapevines." Doctoral thesis, Universitat de les Illes Balears, 2012. http://hdl.handle.net/10803/84126.

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La sequera és una de les majors limitacions per a l’agricultura en general, factor que pot incrementar d’acord amb les prediccions del canvi climàtic. Per això, reduir l’ús de l’aigua en el reg i augmentar l’eficiència en l’ús de l’aigua (EUA) constitueix una de les majors prioritats per aconseguir una agricultura sostenible. L’EUA és un balanç entre guanys de biomassa i les despeses d’aigua. Aquesta Tesi s’ha centrat en l’estudi de 3 dels processos fisiològics que afecten a l’ús de l’aigua i a la producció de la planta en el cas de la vinya, i que per tant poden ser considerats factors poten
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14

Tonmukayakul, Nop. "Water use efficiency of six dryland pastures in Canterbury." Lincoln University, 2009. http://hdl.handle.net/10182/1498.

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The annual and seasonal water use efficiency of six pasture combinations were calculated from the ‘MaxClover’ Grazing Experiment at Lincoln University. Pastures have been established for six years and are grazed by best management practices for each combination. Measurements for this study are from individual plots of four replicates of ryegrass (RG)/white clover (Wc), cocksfoot (CF)/Wc; CF/balansa (Bal) clover; CF/Caucasian (Cc) clover; CF/subterranean (Sub) clover or lucerne. Water extraction measurements showed soils for all dryland pastures had a similar plant available water content of
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15

Bernier, Marie-Hélène. "Assessing on-farm water use efficiency in southern Ontario." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32251.

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Assessing On-Farm Irrigation Water Use Efficiency in Southern Ontario In southern Ontario, irrigation is essential for high value horticultural crop production to overcome insufficient rainfall and achieve stabilized crop production. In a context where competition for limited water resources intensifies due to the expansion of the agricultural sector, increasing urban development and tourism, and potential climate change impacts, conserving water through efficient irrigation has become a key solution to a
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16

Wynn, Paul Laurence. "Water use efficiency and drought resistance in ornamental plants." Thesis, The University of Sydney, 2009. https://hdl.handle.net/2123/28220.

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Increasing concerns over the distribution, abundance and security of fresh water resources in Australia have led to a nationwide re—evaluation of their management and sustainability. The potential for reductions in municipal water use through demand management are substantial, including the potential for savings through the improved design and management of the irrigated urban landscape. It is proposed that the selection of more appropriate plant species is essential to maximising outdoor water savings. Current plant selection practices are, however, typically based upon highly question
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17

Manouseli, Despina. "Evaluation of residential water efficiency programmes in the UK." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/25503.

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Water supply worldwide is facing pressure because of climate change and increasing water demand due to growing population and lifestyle changes. The traditional way of fulfilling the growing demand-supply gap by exploiting new fresh water resources and investing in the expansion of infrastructure is no longer considered environmentally or economically sustainable. The new path the water industry should follow is the management of water demand. Pilot residential efficiency initiatives are being launched by UK water providers over the past decade but despite the progress documented in this area,
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18

Reyes, Torres Maria Del C. "Water Management Efficiency in the Food and Beverage Industry." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2298.

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Water is critical for food production, food security, and health. Water quality management influences freshwater sustainability, land, and energy administration. Global agriculture accounts for more than 70% of all water consumption; the fertilizer, manure, and pesticide overspills are chief sources of water pollution worldwide. On a global scale, food-related waste directly impacts local food production and water resource management. The purpose of this multiple-case study on the food and beverage (FB) industry in the State of Georgia was to identify successful strategies for improving water
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19

Nickerson, Joel. "The Role of Knowledge and Attitude in Residential Irrigation Efficiency." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc149645/.

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Residential irrigation efficiency is a long-term concern for any community that faces water supply stress. When ability to raise water prices is constrained, public education and conservation programs can produce reduced water usage. Understanding the factors behind residential irrigation efficiency allows the design of more effective conservation campaigns. Combining site-specific water budgets with usage data for four hundred homes in North Texas enables quantifying efficient irrigation behavior. A survey of homeowners tests for the presence of conservation-positive attitudes and the knowled
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20

Juana, James Sharka. "Efficiency and equity considerations in modeling inter-sectoral water demand in South Africa." Pretoria : [S.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-06062008-140425/.

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21

Newby, Adam F. "Increasing Water Application Efficiency in Greenhouse Crop Production UsingGravimetric Data." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366376123.

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22

Hoolohan, Claire. "Reframing water efficiency : towards interventions that reconfigure the shared and collective aspects of everyday water use." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/reframing-water-efficiency-towards-interventions-that-reconfigure-the-shared-and-collective-aspects-of-everyday-water-use(9051041e-e89b-43e5-888a-f41ad9d4c926).html.

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This is a thesis about water efficiency, a particular set of practices in the water industry of England and Wales designed to reduce end-use water demand in homes and businesses. Broadly, the thesis aims to understand how water efficiency activities organised and funded by water companies might more effectively support the development of sustainable patterns of domestic demand, in order to contribute to long-term sustainable water management. To achieve this aim, mixed qualitative methods are used to; a) evaluate the extent to which two non-conventional water efficiency activities engage with
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23

Bynum, Joshua Brian. "Physiological applications for determining water use efficiency among cotton genotypes." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2635.

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24

Choi, Seng Fai. "Bio-remediation of BTEX-contaminated water with enhanced removal efficiency." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1636324.

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25

Malan, Cheryl. "The efficiency of drinking water treatment plants in removing immunotoxins." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5762_1308732795.

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<p>The aim of this study was to evaluate the effectiveness of water treatment processes of two drinking water plants to remove immunotoxins and steroid hormones. Raw and treated drinking water was screened for effects on inflammatory activity using the biomarker IL-6, humoral immunity using the biomarker IL-10 and cell mediated immunity using the biomarker IFN-&gamma<br>. In vitro human whole blood culture assays were used in order to elucidate potential immunotoxicity.</p>
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26

Nageshkar, Vishal Vinayak. "Enhancing the splitting efficiency of water molecules using conductive nanomaterials." Thesis, Wichita State University, 2013. http://hdl.handle.net/10057/10640.

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27

Ogola, J. B. Ochanda. "Improving water use efficiency of maize through proper nitrogen management." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340024.

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28

Fidar, Abdi Mohamud. "Environmental and economic implications of water efficiency measures in buildings." Thesis, University of Exeter, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529289.

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29

Torba, I. "Optimization of ecological and economic efficiency of water resource reclaiming." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65304.

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Reclaimed water or recycled water (wastewater reuse or water reclamation) is the process of converting wastewater into water that can be reused for other purposes. This process can include agricultural, landscape and field irrigation purposes or even replenishing surface water and groundwater, also referred to as groundwater recharge.
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Torba, I. "Optimization of ecological and economic efficiency of water resource reclaiming." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/66248.

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Reclaimed water or recycled water (wastewater reuse or water reclamation) is the process of converting wastewater into water that can be reused for other purposes. This process can include agricultural, landscape and field irrigation purposes or even replenishing surface water and groundwater, also referred to as groundwater recharge.
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31

Movahedi, Mahsa. "Identifying stomatal signalling genes to improve plant water use efficiency." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/4539/.

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Water is lost from higher plants via transpiration through stomatal pores the aperture of which is regulated by pairs of guard cells. Genetic engineering of the guard cell abscisic acid (ABA) signalling network that induces stomatal closure under drought stress is a key target for improving crop water use efficiency. In this study experiments were designed to investigate whether the biochemical mechanisms associated with the N-end rule pathway of targeted proteolysis could be involved in the regulation of stomatal apertures. The results indicate that the gene encoding the plant N-recognin, PRT
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32

Guerra, Elisa <1982&gt. "New water use efficiency strategies to cope with climate change." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5947/1/Guerra_Elisa_Tesi.pdf.

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Crop water requirements are important elements for food production, especially in arid and semiarid regions. These regions are experience increasing population growth and less water for agriculture, which amplifies the need for more efficient irrigation. Improved water use efficiency is needed to produce more food while conserving water as a limited natural resource. Evaporation (E) from bare soil and Transpiration (T) from plants is considered a critical part of the global water cycle and, in recent decades, climate change could lead to increased E and T. Because energy is required to break
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Guerra, Elisa <1982&gt. "New water use efficiency strategies to cope with climate change." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5947/.

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Crop water requirements are important elements for food production, especially in arid and semiarid regions. These regions are experience increasing population growth and less water for agriculture, which amplifies the need for more efficient irrigation. Improved water use efficiency is needed to produce more food while conserving water as a limited natural resource. Evaporation (E) from bare soil and Transpiration (T) from plants is considered a critical part of the global water cycle and, in recent decades, climate change could lead to increased E and T. Because energy is required to break
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34

GIOLITTI, Anna. "An empirical analysis of efficiency in the Italian water service." Doctoral thesis, Università degli studi di Bergamo, 2015. http://hdl.handle.net/10446/32142.

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The following empirical work examines the impact of a potential restructuring of the Italian water industry, considering a sample of 37 companies and 22 contiguous hypothetical mergers providing water in Italy from 2005 to 2009. With particular attention to the water industry cost efficiency is analyzed by using a parametric methodology: a Translog cost function has been estimated through the SURE model, in order to evaluate the behaviour of returns to scale. Small companies seem to benefit of economies of scale, while the biggest operators encounter diseconomies of scale. Focusing thus on a h
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35

Narayanan, Sruthi. "Canopy architecture and water productivity in sorghum." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/8760.

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Master of Science<br>Department of Agronomy<br>Robert M. Aiken<br>Increasing crop water use efficiency (WUE), the amount of biomass produced per unit water consumed, can enhance crop productivity and yield potential. The objective of the first study was to evaluate the factors affecting water productivity among eight sorghum (Sorghum bicolor (L.) Moench) genotypes, which differ in canopy architecture. Sorghum genotypes, grown under field conditions, showed significant differences in (a) biomass production, (b) water use, (c) intercepted radiation, (d) water productivity and (e) radiation use e
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36

Weber, Christopher. "Operational Efficiency in the Food and Beverage Industry Through Sustainable Water Consumption." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6813.

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The scarcity of water poses a threat to domestic and global economic sustainability while inhibiting the operational efficiency of food and beverage industry firms. The purpose of this multiple case study was to explore the strategies some food and beverage industry leaders in the United States used for implementing sustainable water consumption practices to improve operational efficiency. The conceptual framework for the study was stakeholder theory. The primary data source was semistructured interviews with 4 food and beverage industry leaders in Wisconsin who have responsibility for impleme
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37

Pontoni, Federico. "Essays on water economics." Thesis, Paris 10, 2014. http://www.theses.fr/2014PA100053/document.

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La thèse est structurée autour de quatre articles. Le premier article - What determines efficiency? An analysis of the Italian water sector – offre une évaluation d’efficience du plus grand échantillon d’entreprises italiennes dans le secteur de l’eau qui ait jamais été rassemblé. Cela sur un horizon temporel de quatre ans. Le deuxième article – Hydropower rent in Northern Italy: economic and environmental concerns in the renewal procedure – a deux objectifs: le premier est d’estimer la rente de l’hydroélectricité en Italie, ce qui n’a jamais été intenté auparavant ; le seconde est d’analyser
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38

Liu, Rui. "Nanostructured Semiconductors for High Efficiency Artificial Photosynthesis." Thesis, Boston College, 2013. http://hdl.handle.net/2345/3160.

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Thesis advisor: Dunwei Wang<br>Photosynthesis converts solar energy and stores it in chemical forms. It is one of the most important processes in nature. Artificial photosynthesis, similar to nature, can provide us reaction products that can potentially be used as fuel. This process promises a solution to challenges caused by the intermitted nature of solar energy. Theoretical studies show that photosynthesis can be efficient and inexpensive. To achieve this goal, we need materials with suitable properties of light absorption charge separation, chemical stability, and compatibility with cataly
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39

Ali, Qurban. "Development of novel multifunctional nanocomposites for antimicrobial efficiency in water treatment." Thesis, University of Central Lancashire, 2018. http://clok.uclan.ac.uk/25416/.

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Water pollution is a major concern worldwide. Bacteria, viruses and fungi present in drinking water cause various diseases as a result of poor hygienic conditions in developing countries. Similarly, presence of microorganisms in drinking water is a threat to public health in developing world due to poor hygienic condition. Numerous disinfectants and biocides are used for inhibiting the growth of pathogenic microbial contamination, producing carcinogenic by-products which are dangerous to human health. This work involved the synthesis, characterisation and application of novel multifunctional n
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40

Cooley, Amanda. "Estimating the Water Budget of Extratropical Cyclones with the Precipitation Efficiency." Thesis, University of Missouri - Columbia, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13850734.

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<p> Estimating the water budget of three mid-latitude extratropical cyclones is attempted from the perspective of the precipitation efficiency (PE), using a method proposed for the study of convective columns. Using a lagrangian, system-relative volume centered on the surface low pressure, each cyclone was followed for most of its lifetime within a pre-defined volume (7 degrees latitude x 9 degrees longitude, or approximately 700 x 700 km). A comparison is then made of total atmospheric water vapor ingested to total moisture eliminated (as precipitation). We hypothesize that the PE increases w
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41

Wunder, Clemens. "Improving Stability and Efficiency of Earth-abundant Electrocatalysts for Water Oxidation." Thesis, Umeå universitet, Kemiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173087.

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42

Hamdani, Anber. "The genetic and physiological basis of water use efficiency in tomatoes." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18642.

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Drought and heat stress are the major abiotic constraints to plant survival and productivity. This study focused on the estimation of genetic variability in response to water deficit conditions, evaluated the use of carbon isotopes to measure water use efficiency (WUE), and identified SNP marker associations with traits linked to higher genotypic performance under water deficit stress. The diverse plant materials were subjected to two irrigation regimes in two planting seasons and characterized for various morphological and fruit quality traits to explain the genetic variance. The study sugge
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43

Liang, Tong Geng. "Trading and economic efficiency in selected Victorian water markets in Australia." Thesis, Liang, Tong Geng (2013) Trading and economic efficiency in selected Victorian water markets in Australia. PhD thesis, Murdoch University, 2013. https://researchrepository.murdoch.edu.au/id/eprint/21316/.

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Optimal allocation of irrigation water is a modern economic and social concern of growing importance in Australia, as well as in many other countries. The market based mechanism has been advocated in the economics literature as an efficient and effective measure for allocation of irrigation water. Water markets and water rights trading have been operating for many years aiming to improve the efficiency of water allocation in the Murray–Darling Basin (MDB) in Australia. Several stages of the Council of Australian Government's water reform agenda have been implemented. Water right and land owner
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44

Aurigi, Daniele. "How regulation affects efficiency and investments in the water sector: a theoretical approach and a case study of the Italian water integrated system in Tuscany." Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1121478.

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My thesis analysed some aspects of water sector regulation. It has two theoretical chapters and a case study. In the first chapter, I used a simple model in order to describe the effect of tariffs regulation on the efficiency of the water providers and to give one possible justification to revising the tariffs method so often as Arera has been doing. In the last part of the chapter, I analyse theoretically another segment of the tariff methods: the incentive to improve efficiency. I found out that the type of incentive in the Italian tariff methods works only for the firms that have the oper
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45

Knamiller, C. "The impact of domestic water user cultures on water efficiency interventions in the South East of England : lessons for water demand management." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5329.

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The need for a more sustainable approach to water consumption has increasingly gained attention in the last decade. The domestic sector accounts for over half of abstracted water in the UK and, as such, has become a major target for water efficiency interventions. Current research and water efficiency interventions are dominated by a positivist approach, focusing on a limited range of factors that can be quantitatively measured. This thesis questions the dominant approach and argues that a more holistic overview of water efficiency can be achieved through the consideration of socio-technical a
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46

Pointeau, Virginie M. "Water-use efficiency and productivity in native Canadian populations of Populus trichocarpa and Populus balsamifera." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/587.

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Afforestation and reforestation programs utilizing available fields for biofuel production, carbon sequestration, and other uses linked to climate change are looking to tree physiologists to identify species and genotypes best-suited to their purposes. The ideal poplar genotype for use in Canadian programs would be drought-resistant, cold-climate adapted, and fast-growing, thus requiring an understanding of links between a variety of physiological traits linked to growth and productivity. This study examined the basis for variations in water-use efficiency within four selected populations of
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47

Huang, Po-Sheng, and 黃柏升. "Study on efficiency of water electrolysis." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/3qp3n4.

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碩士<br>國立中央大學<br>機械工程研究所<br>96<br>During the process of releasing energy, hydrogen produce no green-house-effect gas and has a potential as a energy carrier in the future. Among the methods of hydrogen production, water electrolysis has many advantages, such as high efficiency, high purity in producing hydrogen, easy in use, etc., and thus become one of popular methods. In this study, we use platinum electrodes and modified experimental set-up to study the effects of working parameters, such as concentration of electrolyte, current, voltage, and the time on the efficiency of electrolysis. Base
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48

Rasiuba, Thabo Cecil. "Water budget, water use efficiency in agriculture in Olifants catchment." Thesis, 2009. http://hdl.handle.net/10539/5974.

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Eighty percent of the agricultural land worldwide is under rain-fed agriculture that takes place on most soils that are generally low in fertility with attendant high on farm water losses, thereby resulting in low crop yields. This is particularly significant in sub-Saharan African states where a higher percentage of the population is involved in agriculture and the economy is predominantly driven by rural-based rain-fed agriculture. In the Olifants catchment, the challenges in rainfed agriculture are compounded by erratic, highly variable rainfall patterns in space and time. The study
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49

Matulka, Matthew Neil. "Water use, yield, and water use efficiency of differentially irrigated alfalfa." 1985. http://hdl.handle.net/2097/27495.

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50

Chen, You-Ruei, and 陳宥瑞. "Gas water heater Efficiency Improvement and Design." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/08003735722868003472.

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碩士<br>朝陽科技大學<br>精密機械暨水下機電技術整合產業碩士專班<br>104<br>Abstract In today's gas water heaters have become general household essential goods. Gas water heater as the name implies, is a combustible gas and air are mixed in the way, after entering the burner gas mixing in the combustion chamber for combustion heaters, heat conversion achieved. In the case of today's emphasis on economic, security and environmental protection, in order to achieve better performance, lower cost, safety and reduce pollution, the development trend of today. This study will focus on a particular core heating gas water heater, b
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