Research On Combined Operation Modes Of Solar-ground Coupled Source Heat Pump

In recent years, increasingly severe environmental and energy situation has becom e an important factor in the threat of social stability, renewable clean energy develop ment is imminent, solar and geothermal energy as the two clean solar energy as a he at source-ground source heat pump the coupling system, to ease China’s current energy and environmental crisis will play an invaluable role. This article is in this context, t o Xi’an residents simulation study was conducted by a small example.This study is the basis for the main ground source heat pump is running on a se parate-based. Given the complexity of solar and ground source heat pump combined s ystem, the system can establish a simplified model. In this paper the system is divide d into three separate modules, namely ground heat module, module collectors, heat pu mp module, and then create a mathematical model for each module by coupling par a meter simulation system running between the modules. Collector heat transfer model i n the process of establishing the collector area and collector to determine the best ang le is very important. In determining the best angle, the paper matlab software Xi’an s olar collector receives the amount of radiation and its relationship diagram showing th e inclination angle, and ultimately determine the best Xi’an heater installation angle of about 30 degrees, were determining the area mainly estimated by solar fraction, unit COP and building load relationship ends, the paper collector area of about 6.5m2. The establishment of underground pipe heat transfer model, first introduce the soil thermal properties of some test methods, and gives an expression of soil initial temperature d istribution. In this paper, a mathematical model of underground pipe is a cylindrical h eat source theory established, taking into account the cyclical end load, the establishm ent of change in heat flow model based on a cylindrical heat source theory based.By establishing heat transfer model for the coupled simulation run results analysis:The system is running in parallel mode, the flow through underground pipe to try to increase the coupling system joint operation, the better the effect of one-line mode of operation. Because of the university’s multi-energy utilization in the laboratory(solar- ground source heat pump coupling system) has not yet formally put into operation, so the simulation results have yet to be further experimental verification.