Research On The Holistic Design Method Of Geothermal Structure Based On Ontology Model

The usage of clean and rich geothermal energy has been a feasible way to solve the energy crisis and global warming for today's world advocating new energy.However,there are still some limitations for the design of ground source heat pump system which is the main way to utilize the geothermal energy.At the first,the design methods of the GSHP is so complicated and the usage conditions of the GSHP in the standards is so rigid,which is greatly blocked its use.At the second,it's so difficult to holistically design GHPS according to multiply performance indicators,e.g.safety,economy,safety,heat exchange,etc,due to the correct use of GSHP needs the cooperation of multi fields and sub technologies.At the last,the lack of accurate understanding and knowledge of the new-type GSHP leads to misunderstanding and distortion of its information transmission in different stages and apartments,resulting in unnecessary losses.Thanks to the ontology,it can construct the knowledge domain and has the advantages of cross the field,which could effectively solve the limitations of GSHP.This research combined the ontology and SWRL rules to develop a holistic decision-making system for new-type GSHP,namely the OntoEPS system,OntoBDDS system and OntoETS system,and to construct the knowledge domains ontology of them.In further,the model verification and case verification of the developed comprehensive decision-making system are carried out to prove the scientificity and practicability of the developed tools.The main contents are as follows:(1)For the energy pile system of buildings,this research develops a holistic design tool,named OntoEPS,and the performance indexes of the energy pile system can be reasoned and calculated from the macro level,in order to achieve the best design of the energy pile system.(2)For the bridge deck deicing-system using the energy pile,this research combines the ontology and SWRL rules to develop OntoBDDS decision-making tool to holistically design the energy pile bridge deck deicing system.In that way,the safety,economy and heat transfer of the deicing system design such as bearing capacity,equipment cost and heat flux are measured and calculated to achieve the selection and optimization of the best design scheme.(3)For the.energy tunnel system,a comprehensive decision-making tool named OntoETS is developed to reason and calculate the cost,transferred heat,produced heat,heat flux and system evaluation of energy tunnel system,which can achieve the aim to holistically design energy tunnel system.The developed comprehensive decision-making.systems of this research solve the limitations of the new-type GSHP design and energy structure to some extent,whose scientificity and practicability have also been verified.The details follow:(1)In this research,the accurate knowledge field of new-type GSHP is built,which enriches the knowledge field of traditional ground source heat pump system,avoids the loss caused by information transmission and misunderstanding,and promotes the application of new-type GSHP to a certain extent.(2)the ontology and SWRL rule are combined in this research to connect the multi fields of the new-type GSHP to reason and calculate the multi performance index from a macro level such as cost,transferred heat,produced heat,heat flux and system evaluation,etc,which overcomes the defect that the traditional design method can only consider limited design objectives to some extent.(3)The developed comprehensive decision system is simple and easy to use,and it can be easily used by professionals and designers who have little knowledge of knowledge engineering.By transforming the rules and calculation methods in the specification into SWRL rules,the developed decision system logically overlaps and correlates the data,so that it can infer the performance indexes of different aspects of the system explicitly or implicitly in the complex system design To a certain extent,it overcomes the limitation that traditional design methods rely on complex simulation software and strict use conditions in specifications,which not only greatly reduces the workload of designers,but also relaxes the professional requirements for designers to a certain extent,and promotes the popularization and use of GSHP system.