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Abstract
This paper presents an efficient data mining strategy to reveal the operational problems of ground source heat pump (GSHP) systems. Symbolic Aggregate approXimation was employed to identify typical daily load patterns and provide a reference for data partition. Kernel Density Estimation was used to evaluate overall system performance in different operation patterns identified. To find the root causes of inefficient operations, a customized association rule mining model was developed to discover the associations among different attributes. Lastly, the inference tree technique was applied to demonstrate the discovered associations for better comparative analysis. This strategy was evaluated using one-year operational data of a GSHP system. It was found that only 25% of the operations of this GSHP system in cooling seasons during 00:00–06:00 were considered as energy efficient, while above 79% of the operations in heating seasons were considered as energy efficient. Ex ....

Density Estimation , Association Rule Mining , Data Mining , Ground Source Heat Pump , Sustainable Development , Ymbolic Aggregate Approximation ,