Abstract
In order to effectively predict the performance of ground source heat pump system, a performance prediction method is proposed in this paper. Based on the basic model of forward neural network, the algorithm predicts the performance data of ground source heat pump system by inputting the time series of system performance and 12 variables including 7 drilling parameters, 2 u-pipe parameters, 2 ground parameters and 1 circulating liquid parameter. The training of the model is divided into three subtasks by the strategy of multi-task learning and co-evolution, where CMA-ES is used as the evolutionary algorithm of the subtask. The experimental results show that the RMSE of the predicted results obtained by the proposed algorithm is less than 0.2, which verifies the effectiveness of the method. At the same time, this algorithm fully considers various influencing factors and has good versatility, which can be used as a reference for the design of ground source heat pump system.
Highlights
The ground source heat pump system is an energy-efficient and environmentally-friendly air-conditioning system that utilizes geothermal resources in shallow underground to provide both heating and cooling
When predicting the performance of a ground source heat pump system, each variable has a different range of variation, which has a detrimental effect on the following data mining process
1) This method can be used to predict long-term continuous performance of ground source heat pump systems. This data mining-based method does not require complex physical system modeling and energy analysis. It considers more factors affecting the performance of ground source heat pump systems
Summary
The ground source heat pump system is an energy-efficient and environmentally-friendly air-conditioning system that utilizes geothermal resources in shallow underground to provide both heating and cooling. It can transfer energy from a low-temperature heat source to a high-temperature heat source by inputting a small amount of high-grade energy (electric energy). The heat in the soil is ‘‘taken out’’ and used to raise the temperature by the heat pump technology to supply indoor heating. The heat indoor is ‘‘taken out’’ and released into the soil, which can balance the underground temperature throughout the year [1]. What’s more, compared with conventional air-source heat pump systems, it has higher performance
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