Whole-year performance detection method for ground source heat pump system

The invention provides a whole-year performance detection method for a ground source heat pump system. The method comprises the following steps: step 1, calculating extreme values of cold and hot loads of a building and annual operation time distribution proportions of a system under different load rate intervals; step 2, calculating the real-time hourly load of the building according to the outdoor temperature at the current detection moment; step 3, calculating a system operation load rate according to the extreme value of the cold and hot load of the building and the real-time hourly load of the building, and updating the operation cumulative duration; step 4, calculating system operation energy efficiency ratios under different load rate intervals according to system inlet and outlet water temperatures, flows and equipment power consumption; step 5, judging whether the operation cumulative time length is greater than a preset time length or not, and if yes, executing the step 6; and step 6, outputting the