Download or read book Energy Performance Estimation of Cooling Towers written by Zilai Zhao and published by . This book was released on 2016 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to investigate and compare the performance of cooling towers using Effectiveness-NTU model and the empirical model of cooling towers. The process of achieving the goals includes: Developed both models of the cooling tower using the Effectiveness-NTU method, and empirical method for predicting the performance at the design and off-design conditions; Stated experimental protocols and gathered data on HVAC cooling towers on campus of the University of Alabama; Used collected data to validate the models; Compared results from models with real measurements and find the limitations of models; Applied known annual weather data to estimate the performance and energy consumption of cooling tower for a whole year; Recommended the approach for the best energy and heat performance of cooling towers. As a result, the Effectiveness-NTU model provided closer results than the empirical model. All data and specifications were measured and gathered from the experiment on the cooling tower on campus. However, the air mass flow rate and the temperature of the leaving air were not always possible to gather in different cooling towers, especially industry cooling towers. Therefore, both models were designed to predict mass flow rate, and temperature of the leaving air by applying air temperature and relative humidity. Further testing is required to validate the accuracy of the models because there was a limited control over the running status of fans and the experiments were not done in wintertime with lower entering air temperature. Validation of the models on another cooling tower is also essential. Additionally, the empirical model can be improved if there is a way to reset all 27 coefficients based on different cooling towers.

Download or read book Air cooled Heat Exchangers and Cooling Towers written by Detlev G. Kröger and published by . This book was released on 2004 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Evaluation of the Braintree Electric Light Department Dry Cooling Tower written by M. D. Henderson and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Creating a New Model to Predict Cooling Tower Performance and Determining Energy Saving Opportunities Through Economizer Operation written by Pranav Yedatore Venkatesh and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooling towers form an important part of chilled water systems and perform the function of rejecting the heat to the atmosphere. These systems are often not operated optimally, and cooling towers being an integral part of the system present a significant area to study and determine possible energy saving measures. Operation of cooling towers in economizer mode in winter and variable frequency drives (VFDs) on cooling tower fans are measures that can provide considerable energy savings. The chilled water system analysis tool (CWSAT) software is developed as a primary screening tool for energy evaluation for chilled water systems and quantifies the energy usage of the various components and typical measures that can be applied to these systems to conserve energy, all while requiring minimum number of inputs to analyze component-wise energy consumption and incurred overall cost. A careful investigation of the current model in CWSAT indicates that the prediction capability of the model at lower wet bulb temperatures and at low fan power is not very accurate. A new model for accurate tower performance prediction is imperative, since economizer operation occurs at low temperatures and most cooling towers come equipped with VFDs. In this thesis, a new model to predict cooling tower performance is created to give a more accurate prediction of energy savings for a tower. Further the economic feasibility of having additional cooling tower capacity to allow for economizer cooling, in light of reduced tower capacity at lower temperatures is investigated.

Download or read book Coefficient of Performance of Industrial Cooling Systems written by Amit Chawathe and published by GRIN Verlag. This book was released on 2024-01-24 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2020 in the subject Engineering - Mechanical Engineering, grade: 3.4, Rutgers The State University of New Jersey, language: English, abstract: Chiller plant systems often have the highest consumption of energy in a facility. Hence, it becomes essential for estimating the coefficient of performance (COP) of an industrial cooling system to ensure efficient use of resources. Various chiller plant systems have been analyzed to establish techniques or methodologies for determining the COP. Performance degradation with age and recent new technologies create an enormous range of COPs from 2 to 8 or more. After analyzing, it is found that the critical parameter for determining the COP of any type of chiller plant system is the mass flow rate. Remarkably, many industrial cooling systems do not measure mass flow rate in any part of the chilled water system and therefore cannot calculate COP. Good energy efficiency practice then requires that techniques be developed to estimate mass flow rate in industrial cooling systems in situ, without shutting down the system and installing measurement equipment. Three methodologies have been examined for measuring the mass flow rate of the condenser water loop. The first method looks at the cooling tower part of the condenser water loop to determine the mass flow rate of the condenser water by isolating some of iii the valves. The second method makes use of pump curves with relation to the differential pressure to calculate the flow rate of either the chilled water or the condenser water. Lastly, an ultrasonic flow meter is considered as a means to determine the flow rate in a running system. The mass flow rate is then used in the estimation of COP of the chiller cooling tower system.

Download or read book Procedures for Simulating the Performance of Components and Systems for Energy Calculations written by American Society of Heating, Refrigerating and Air-Conditioning Engineers. Task Group on Energy Requirements for Heating and Cooling of Buildings and published by . This book was released on 1975 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy efficient High tech Buildings written by William Tshudi and published by . This book was released on 2008 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air cooled Heat Exchangers and Cooling Towers written by Detlev G. Kröger and published by PennWell Books. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new text represents the most detailed and comprehensive book presenting modern practice and theory relevant to the thermal-flow performance evaluation, design, and optimization of air-cooled heat exchangers and cooling towers. Kroger provides modern analytical and empirical tools used to evaluate the thermal-flow performance and design of air-cooled heat exchangers and cooling towers. He also covers how to prepare improved specifications and evaluate more critical bids with respect to thermal performance of new cooling systems. Further, Kroger explores improvement possibilities with respect to retrofits of existing cooling units as well as possible impacts of plant operations and environmental influences.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Evaluation of Cooling Tower Drift Eliminator Performance written by Massachusetts Institute of Technology. Energy Laboratory and published by . This book was released on 1977 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Building Services Design for Energy Efficient Buildings written by Paul Tymkow and published by Routledge. This book was released on 2013-07-18 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role and influence of building services engineers is undergoing rapid change and is pivotal to achieving low-carbon buildings. However, textbooks in the field have largely focused on the detailed technicalities of HVAC systems, often with little wider context. This book addresses that need by embracing a contemporary understanding of energy efficiency imperatives, together with a strategic approach to the key design issues impacting upon carbon performance, in a concise manner. The key conceptual design issues for planning the principal systems that influence energy efficiency are examined in detail. In addition, the following issues are addressed in turn: Background issues for sustainability and the design process Developing a strategic approach to energy-efficient design How to undertake load assessments System comparison and selection Space planning for services Post-occupancy evaluation of completed building services In order to deliver sustainable buildings, a new perspective is needed amongst building and services engineering designers, from the outset of the conceptual design stage and throughout the whole design process. In this book, students and practitioners alike will find the ideal introduction to this new approach.

Download or read book Energy Planning for Buildings written by Michael M. Sizemore and published by . This book was released on 1979 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Equations for Estimating Performance Losses of Natural draft Dry Cooling Towers written by Franklin Kingston Moore and published by . This book was released on 1976 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air cooled Heat Exchangers and Cooling Towers written by and published by . This book was released on 1998 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fossil Energy Update written by and published by . This book was released on 1976 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diagnosis and Robust Control of Complex Building Central Chilling Systems for Enhanced Energy Performance written by Dian-Ce Gao and published by Springer Nature. This book was released on 2019-12-12 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses enhancing the overall energy performance of building central air-conditioning systems through fault diagnosis and robust control strategies. Fault diagnosis strategies aim to determine the exact cause of problems and evaluate the energy impact on the system, while robust control strategies aim to manage chilled water systems to avoid the occurrence of low delta-T syndrome and deficit flow problems. Presenting the first academic study of the diagnostic method and control mechanism of “small temperature difference syndrome”, the book describes the highly robust and adaptive fault-tolerant control method developed to overcome the influences of external disturbance on the process control in practical applications. The diagnostic technology developed provides a predictive assessment of the energy dissipation effect of the fault. This book is a valuable reference resource for researchers and designers in the areas of building energy management and built environment control, as well as for senior undergraduate and graduate students.

Download or read book Cooling Tower Fan Control for Energy Efficiency written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates the economics of alternative cooling tower capacity control methods. Annual fan electrical energy requirements are calculated for towers with single-speed, two-speed, and variable-speed fans. Fan energy requirements are determined for counter-flow and cross-flow towers designed for low initial cost and for energy efficiency. Effectiveness-NTU equations are solved to predict cooling tower performance at various fan speeds. Natural convection, which determines the cooling capacity when the fan is off, is accounted for using a mean enthalpy difference. Ambient conditions are simulated using typical meteorological year data for five locations. The results show that potential savings are not strongly dependent on the approach temperature, but do increase with increasing range in colder climates. The potential for saving is greatest for cooling towers designed for low initial cost, and is generally higher in locations where the wet-bulb temperature remains relatively constant throughout the year. Two-speed fans that can operate at half speed are generally more suitable for low-cost cooling towers. Two-speed fans that can operate at two-third speed are better for towers designed for energy efficiency and are generally better when the range exceeds 10 F.