The Research Ofmultifunctional Ground-resource Heat Pump Air-conditionging System

Ground-source heat pump system is a new technology, which is energy saving and environmental protection. It uses renewable energy, and has been made a very wide range of applications in the buildings in our country.Especially in thesystem design of air conditioning, the application of ground-source heat pump technology has been made more progress. It uses the condensing recycled heatto providehot water for us. The multifunctional ground-source heat pump technology to further improves the energy-saving of the system, and has been applied in more and more green buildings.This work presents the rearch of classification, working principl and application on the multifunctional ground-source heat pump syetem. On the basis of this, first completed the study on multifunctional ground-source heat pump unit.Throughthe theoretical calculation and selection on theunit components, completedunit design, and finished oil return scheme design ofthe full liquid type screw unit.By optimizing the control program, completed the design vision of the functions aboutmultifunctional ground-source heat pump unit. In addition, through the analysising and researching the application of multifunctional ground-source heat pump system, discussedthe problem of cooling load was insufficientin summer, while the hot water load demand was large.Putted forward the methods of optimizing the system of central control logic and system structure design,which solved the problem effectively.Provided agood design guidance on the system design of multifunction ground-source heat pump system.Finally, through the calculation of hot water system on a practical case,introduced the economic of multifunction ground source heat pump units,whichusethe condensing recoveriedheat for domestic hot water.This work gavea guiding significance for the marketing promotion and applicationsof multifunctional ground-source heat pump system.