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Appl. Sci. 2017, 7(8), 797;

Dynamic Performance Analysis for an Absorption Chiller under Different Working Conditions

Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Department of Building Science, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Received: 4 July 2017 / Revised: 31 July 2017 / Accepted: 31 July 2017 / Published: 5 August 2017
(This article belongs to the Special Issue Sciences in Heat Pump and Refrigeration)
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Due to the merits of energy saving and environmental protection, the absorption chiller (AC) has attracted a lot of attention, and previous studies only concentrated on the dynamic response of the AC under a single working condition. However, the working conditions are usually variable, and the dynamic performance under different working conditions is beneficial for the adjustment of AC and the control of the whole system, of which the stabilization can be affected by the AC transient process. Therefore, the steady and dynamic models of a single-effect H2O-LiBr absorption chiller are built up, the thermal inertia and fluid storage are also taken into consideration. And the dynamic performance analyses of the AC are completed under different external parameters. Furthermore, a whole system using AC in a process plant is analyzed. As a conclusion, the time required to reach a new steady-state (relaxation time) increases when the step change of the generator inlet temperature becomes large, the cooling water inlet temperature rises, or the evaporator inlet temperature decreases. In addition, the control strategy considering the AC dynamic performance is favorable to the operation of the whole system. View Full-Text
Keywords: absorption refrigeration; water-lithium bromide; single effect; transient; relaxation time absorption refrigeration; water-lithium bromide; single effect; transient; relaxation time

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wang, J.; Shang, S.; Li, X.; Wang, B.; Wu, W.; Shi, W. Dynamic Performance Analysis for an Absorption Chiller under Different Working Conditions. Appl. Sci. 2017, 7, 797.

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