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Actual Coefficient

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Xiuwei Li – One of the best experts on this subject based on the ideXlab platform.

  • capacitive deionization regeneration as a possible improvement of membrane regeneration method for absorption air conditioning system
    Applied Energy, 2016
    Co-Authors: Xiuwei Li, Xiaosong Zhang, Hao Wang, Zhuo Zhang
    Abstract:

    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.

  • capacitive deionization regeneration as a possible improvement of membrane regeneration method for absorption air conditioning system
    Applied Energy, 2016
    Co-Authors: Xiuwei Li, Xiaosong Zhang, Hao Wang, Zhuo Zhang
    Abstract:

    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.

  • 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, 2004
    Co-Authors: Jin-lung Guan
    Abstract:

    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.

  • 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, 2004
    Co-Authors: Jin-lung Guan
    Abstract:

    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.