The Performance Analysis And Improvement Of The Core Parts Of Ground Source Heat Pump

In recent decades, the heat pump product obtained in our country has promoted well, on to Governmental agency's widespread use, down to the state-owned private enterprise's independent research and development, urged the domestic heat pump market to have the good development. The source heat pump takes in heat pump's one kind, it not only may reduce the air source heat pump effectively easily the seasonal variation influence, moreover also has the water source heat pump that kind of building cost of projects cost to be low, the coefficient of performance higher merit, also has simultaneously solved the problem which the ground water type water source heat pump returns irrigates, thus has protected the groundwater resources effectively. Therefore, the source heat pump uses the renewable energy source, the highly effective energy conservation, the environmental protection by it not to have the pollution fully, to be possible to realize the function to be many, the life is long, the structure to be compact as well as the automaticity higher merit, has become now one in central air-conditioning system plan first choice forms.The GSHP unit takes the entire heat pump's core, its quality immediate influence heat pump performance height, but in the unit performance's fit and unfit quality also have close contacting with its core part; At the same time, unit's performance with soil heat interchanger's heat transfer effect related, but the heat transfer effect will also receive the seasonal variation the influence, this will cause the soil heat interchanger's water leakage temperature to produce along with the season change fluctuates correspondingly, will then cause the unit to have the different performance parameter under the different operating mode. Therefore, based on the above two spots, unifies the place source heat pump unit which some company produces, according to the part influence whole's principle, has carried on unit's performance analysis the unit division, namely divides into the single screw rod compressor's performance analysis and the design improvement, the evaporator and condenser's heat transfer numerical simulation and the structure improvement, as well as the addition spray restores vital energy the system to the unit performance influence experiment. Through this kind of unit division, may promulgate each unit clearly to unit's performance influence, thus provides the essential theory support and the optimized method for the design or the optimized heat pump unit. At the same time, in view of changes the operating mode question, has designed the special test facility, uses in testing under the same vaporization temperature the different condensing temperature to the unit performance influence, had determined when winter summer two seasons the water source side best saliva is in and out warm.This article revolves"coming from the project, servicing project"in this principle, the use applied mathematics related knowledge and the numerical simulation technology with emphasis, has carried on the performance analysis and the improvement to the place source heat pump unit's two big core part, concrete manifestation: 1st, has established the corresponding mathematical model using applied mathematics' method, inferred has been suitable in the single screw rod compressor loses the spirit, the pressure compared to and so on formulas, the single screw rod compressor's primary structure parameter and the compressor performance parameter related effectively in together, has analyzed the influence compressor performance factor in detail, and according to the analysis result, has given designed when the compressor the optimize structure parameter. Therefore, to a certain extent, also has increased the home to the single screw rod compressor's fundamental research content.2nd, uses the Fluent formidable numerical simulation function, has carried on the flow field and the thermal field analysis to the original heat pump unit's dry shell type evaporator, the basis analysis conclusion, has made the improvement with Solidworks to the original structure's deficiency, simultaneously, this has also realized CAE (computer auxiliary analysis) and CAD (computer-aided design) good union.