The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform
Xiuwei Li - One of the best experts on this subject based on the ideXlab platform.
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capacitive deionization regeneration as a possible improvement of membrane regeneration method for absorption air conditioning system
Applied Energy, 2016Co-Authors: Xiuwei Li, Xiaosong Zhang, Hao Wang, Zhuo ZhangAbstract:Driven by renewable energy and being environment friendly, the absorption air-conditioning system is a good choice for green buildings. Concentrating the absorbent solution with electrodialysis method, the membrane regeneration absorption system has higher performance than the traditional absorption system. Its theoretical Coefficient of performance can approach 6 under certain working conditions. However, the experimental data in this paper reveals the Actual Coefficient of performance of the membrane regeneration system is about 1–2, much lower than expected. It is caused by the energy loss in heating and electrochemical reactions. To improve, a capacitive deionization regeneration method is proposed: strong absorbent solution and pure water are acquired with the joint work of two units. Analysis has been made on the absorption air-conditioning system adopting this method. The mass and energy equations have been developed and some parameters have been investigated for performance optimization. Even with conservative prediction, the results show the capacitive deionization method has better performance than the membrane regeneration method. The Coefficient of performance can be enhanced by 100% with the energy recovery strategy. Capacitive deionization method also has advantages on the cost and maintenance, which makes it a promising choice for the absorption air-conditioning system.
Zhuo Zhang - One of the best experts on this subject based on the ideXlab platform.
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capacitive deionization regeneration as a possible improvement of membrane regeneration method for absorption air conditioning system
Applied Energy, 2016Co-Authors: Xiuwei Li, Xiaosong Zhang, Hao Wang, Zhuo ZhangAbstract:Driven by renewable energy and being environment friendly, the absorption air-conditioning system is a good choice for green buildings. Concentrating the absorbent solution with electrodialysis method, the membrane regeneration absorption system has higher performance than the traditional absorption system. Its theoretical Coefficient of performance can approach 6 under certain working conditions. However, the experimental data in this paper reveals the Actual Coefficient of performance of the membrane regeneration system is about 1–2, much lower than expected. It is caused by the energy loss in heating and electrochemical reactions. To improve, a capacitive deionization regeneration method is proposed: strong absorbent solution and pure water are acquired with the joint work of two units. Analysis has been made on the absorption air-conditioning system adopting this method. The mass and energy equations have been developed and some parameters have been investigated for performance optimization. Even with conservative prediction, the results show the capacitive deionization method has better performance than the membrane regeneration method. The Coefficient of performance can be enhanced by 100% with the energy recovery strategy. Capacitive deionization method also has advantages on the cost and maintenance, which makes it a promising choice for the absorption air-conditioning system.
Jin-lung Guan - One of the best experts on this subject based on the ideXlab platform.
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real time measurement approach for tracking the Actual Coefficient of spl delta v spl delta v sub 10 of electric arc furnace
IEEE Transactions on Power Delivery, 2004Co-Authors: Jin-lung GuanAbstract:This investigation develops a new definition of the voltage fluctuation (/spl Delta/V) electric arc furnace. Analysis of voltage flicker spectrum in the 0.25-30-Hz range reveals that the magnitude of each modulation frequency component decreases with frequency, while the standard deviation of each frequency component is high. From the statistics of electric arc furnace real time test data, the loads can be classified as weakly stationary processes, but lack a Gauss probability distribution. Traditionally, the equivalent 10-Hz voltage fluctuation (/spl Delta/V/sub 10/) value can be obtained from /spl Delta/V/3.6. However, the real world tests and statistics indicate that the ratios of /spl Delta/V//spl Delta/V/sub 10/ are 1.8, not 3.6.
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Real-time measurement approach for tracking the Actual Coefficient of /spl Delta/V//spl Delta/V/sub 10/ of electric arc furnace
IEEE Transactions on Power Delivery, 2004Co-Authors: Jin-lung GuanAbstract:This investigation develops a new definition of the voltage fluctuation (/spl Delta/V) electric arc furnace. Analysis of voltage flicker spectrum in the 0.25-30-Hz range reveals that the magnitude of each modulation frequency component decreases with frequency, while the standard deviation of each frequency component is high. From the statistics of electric arc furnace real time test data, the loads can be classified as weakly stationary processes, but lack a Gauss probability distribution. Traditionally, the equivalent 10-Hz voltage fluctuation (/spl Delta/V/sub 10/) value can be obtained from /spl Delta/V/3.6. However, the real world tests and statistics indicate that the ratios of /spl Delta/V//spl Delta/V/sub 10/ are 1.8, not 3.6.
Mahmoud S. Audi - One of the best experts on this subject based on the ideXlab platform.
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Performance of a solar LiBr-water absorption refrigeration system
Renewable Energy, 1992Co-Authors: Mahmoud Hammad, Mahmoud S. AudiAbstract:Abstract This paper describes the performance of a nonstorage, continuous, solar operated absorption refrigeration cycle. The solar collectors and the refrigeration experimental unit are manufactured locally. The results presented in this paper are based on the operation of the unit when there was enough solar energy to power its generator. This amounted to 4–5 h per day during the months of August and September in Amman, Jordan. These results include the variation of both the generator and evaporator temperatures during the test periods, the performance of the unit as a function of these temperatures and available solar intensity, and the ideal performance of the unit based on the measured temperatures. The maximum ideal Coefficient of performance was determined as being equal to 1.6, while the peak Actual Coefficient of performance was determined to be equal to 0.55. These values are very close to published values.
E.d. Rogdakis - One of the best experts on this subject based on the ideXlab platform.
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R22‐E181 absorption water chilling package thermodynamics and performance in the range of ARI 560‐2000 standard rating conditions
International Journal of Energy Research, 2003Co-Authors: E.d. RogdakisAbstract:The purpose of this work is the thermodynamic analysis and the performance prediction of R22–E181 absorption water chilling package for standard rating conditions according to ARI 560-2000. The analysis is based on the description of the exact thermodynamic cycle plotting the enthalpy–mass fraction and the temperature–enthalpy charts. The thermodynamic properties of the R22–E181 are given in a new set of equations using extended experimental data from the literature. A step-by-step calculation model was established in order to predict the characteristic points of the thermodynamic cycle of the R22–E181 ARU and to simulate its performance. The influence of the ambient conditions on the operation of the ARU is shown graphically when the saturated condensing temperature ranges from 30 to 45°C. Regression analysis is carried out to express the Actual Coefficient of performance and the cooling load as functions of the condenser temperature and the absorber–condenser temperature difference. According to ARI Standard 560-2000 for an absorption water chilling package, it has been found that the integrated part-load value of the COP ranges from 53 to 60%. When the saturated condensing temperature is 41.1°C, the saturated evaporating temperature is 4°C and the ABS/COND temperature difference ranges from 6 to 9°C. The decrease of the chilled water temperature passing through evaporator is 5.6°C. Copyright © 2004 John Wiley & Sons, Ltd.
