Municipal solid waste landfills as geothermal heat sources
Municipal solid waste landfills as geothermal heat sources
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DOI：
10.1016/j.rser.2012.07.028
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发表时间：
2013-03
影响因子：
15.9
通讯作者：
C. Coccia;Ranjiv Gupta;Jeremy W. F. Morris;J. McCartney
中科院分区：
文献类型：
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作者：
C. Coccia;Ranjiv Gupta;Jeremy W. F. Morris;J. McCartney
众所周知，与传统的建筑供暖和制冷系统相比，地源热泵需要更少的外部能量输入，因为它们与地下土壤和岩石进行热量交换，与外部空气相比，地下土壤和岩石具有稳定的温度。为了解决实施地源热泵的障碍，正在研究将热交换器纳入土木工程基础设施，以降低安装成本。在这些基础设施中，城市固体废物(MSW)垃圾填埋场可能是GSHP的一个潜在热源，因为它们的温度较高，与废物中有机物质的长期放热分解有关。为了评估这一潜力，本文对垃圾填埋场热源特性的研究进行了综述。此外，还评估了热交换对甲烷产生率、垃圾填埋场衬垫水力性能以及渗滤液收集系统堵塞的潜在影响。根据垃圾填埋场的建设要求和实践中使用的不同地源热泵安装方式，提出了不同垃圾填埋场运行和关闭方案下的地热换热器配置方案。对垃圾填埋场地热交换的经济分析表明，垃圾填埋场有望提供一种可获得和可持续的热能资源。
It is well established that ground-source heat pumps (GSHPs) require less external energy input than conventional heating and cooling systems for buildings because they exchange heat with the subsurface soil and rock, which has a steady temperature compared to that of the outside air. To address barriers to implementation for GSHPs, incorporation of heat exchangers into civil engineering infrastructure is being investigated to reduce installation costs. Of these infrastructures, municipal solid waste (MSW) landfills may be a potential source of heat for GSHPs due to their elevated temperatures associated with the long-term, exothermic decomposition of organic materials within the waste. To assess this potential, this paper provides a review of studies focused on characterization of the thermal resource of landfilled MSW. Further, the potential impacts of heat exchange on rates of methane generation, hydraulic performance of landfill liners, and clogging of leachate collection systems are evaluated. Based on landfill construction requirements and different approaches for GSHP installation used in practice, configurations for geothermal heat exchangers in landfills are proposed for different landfill operational and closure scenarios. An economic analysis of geothermal heat exchange in MSW landfills indicates that they are expected to provide an accessible and sustainable thermal energy resource.