cheng zhen

Mr. cheng zhen

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 January 2023 in Energies
Verified
Journal Article
Open access
PDF file
CZcheng zhen
cheng zhen
Jide NiuJide Niu
Jide Niu
Zhe TianZhe Tian
Zhe Tian
Model-based optimization is an important means by which to analyze the energy-saving potential of chiller plants. To obtain reliable energy-saving results, model calibration is essential, which strongly depends on operating data. However, sufficient data cannot always be satisfied in reality. To improve the prediction accuracy of the model with limited data, a model calibration method based on error reverse correction was investigated. A traditional optimization-based calibration method was first used for preliminary model calibration to obtain simulation data and simulation errors. Then, the sources of the simulation errors were analyzed to determine the distribution characteristics of the corresponding operating conditions of the model. Finally, the performance of the model was reversely corrected by adding a correction term to the original model. The proposed calibration method was tested on a chiller plant in Xiamen, China. The results showed that the proposed calibration method improved prediction accuracy by 2.61% (the coefficient of variation of the root mean square error (CV (RMSE)) was reduced from 3.96% to 1.35%) compared to the traditional method. The maximum mean bias error (MBE) for monthly chiller energy consumption was 2.66% with the proposed calibration method, while it was 10.42% with the traditional method. Overall, in scenarios with limited data, the proposed calibration method can effectively improve the accuracy of simulation results.

14 May 2025 in Energy and Buildings
Verified
Journal Article
Closed access
ZTZhe Tian
Zhe Tian
JLJunze Li
Junze Li
YLYakai Lu
Yakai Lu
JNJide Niu
Jide Niu
HZHaizhu Zhou
Haizhu Zhou
CZcheng zhen
cheng zhen