地下能源系统研究现状及亟待开展的工作

Research Status and the Urgent Task for Ground Energy System

地下能源系统把地基和地下水作为热源或冷却池,降低了能耗,提高了建筑环保效能。在系统中,地下部分的设计和使用是系统造价及运行费用的主要方面。从岩土的角度出发,对一些已有设计方法进行讨论,并指出潜在的不可行的地下能源系统模型(短期型、长期型及受规范约束的模型)。短期型可能是由于系统地下部分的供给能力过低,或是地下结构和岩土联系不够紧密。长期型可能是由于对负荷或岩土热参数估计错误造成的。对地下能源系统可能的设计方向进行了探讨,并指出岩土概念对地下能源系统设计的重要性。

The ground source and ground water are taken as the heat source or cooling pond for the ground energy systems to reduce energy costs and to improve the environmental performance of buildings.The design and performance of the ground element of these systems are dominant factors in the capital and operating costs of the system.Some of the design approaches are expounded from a geotechnical perspec tive,and the potential failure modes of ground systems are proposed including the short-term mode,the long-term mode and the mode limited by regulations.The short-term mode may caused by the deficiencies from underground part of the system and/or from poor connection between the infrastructure and the ground.The long-term failures may derive from mis-estimation on loads and/or thermal parameters of ground.Possi ble directions in the design of ground energy systems are discussed,proposing the concept of ground is necessary for underground energy system design.