Use of Municipal Solid Waste Landfill as Heat Source of Heat Pump
Use of Municipal Solid Waste Landfill as Heat Source of Heat Pump
复制标题
DOI：
10.1016/j.egypro.2016.11.045
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
G. Emmi;A. Zarrella;A. Zuanetti;M. Carli
中科院分区：
文献类型：
--
作者：
G. Emmi;A. Zarrella;A. Zuanetti;M. Carli
热泵系统今天被认为是一种环保技术，与其他可再生能源的能源生产系统一起，是减少能源消耗和由于建筑物空调而产生的温室气体排放的基础。与使用空气作为热源的更常见的系统相比，地源热泵使用地面作为热源，能够提供更好的能源性能。由于废物的分解，城市固体废物（MSW）受控垃圾填埋场内温度的升高可以使废物量成为这种情况下可行的替代方案，用作产生热量的热源。本研究的目的是分析利用城市生活垃圾填埋场通过热泵加热空间的潜力。本文第一部分分析了城市生活垃圾填埋场的主要特点，从系统设计到有机物的生物降解过程。随后，讨论了在垃圾填埋场内插入或覆盖的热交换器的可能配置。基于文献中的发现，为意大利东北部城市生活垃圾填埋场的实际案例研究创建了一个动态模型。为了利用有限元方法进行年度模拟，在模型中施加边界条件（即土壤的年温度循环，与周围空气和辐射的对流换热，分布在质量上的产热函数），从而获得了质量废物所达到的温度值。通过创建一组用户的热负荷概况，可以确定从垃圾填埋场提取的总能量和热泵运行所需的电力。通过与采用水平管道的地源热泵进行比较，得出了该装置可实现的潜在节能效果。
The heat pump systems are considered today an environmentally friendly technology and, together with other energy production systems from renewable sources, are fundamental for reducing energy consumption and the resulting greenhouse gas emissions due to air conditioning of buildings. The ground source heat pumps use the ground as a heat source able to provide the better energy performance if compared with more common systems which using air as source. The increase of the temperatures inside the controlled landfills of municipal solid waste (MSW), due to the decomposition of waste materials can make the volume of waste a viable alternative in this context, to be used as a heat source for the production of heat. The present work has the objective of analyzing the potential of use of a MSW landfill for space heating through a heat pump.The first part of the work analyzes the main features of a landfill of municipal solid waste starting from system design through to biological degradation processes of organic matter. Subsequently the possible configurations of heat exchangers to be inserted within or covering the landfill is discussed.Based on the findings found in the literature, a dynamic model has been created for a real case study of a MSW landfill located in the north-east of Italy. Boundary conditions (i.e. annual temperature cycles for the soil, heat exchange by convection with the ambient air and radiation, a heat generation function distributed on the rejection of mass) have been imposed to the model in order to carry out annual simulations by means of finite element method, thanks to which the values of temperature reached by the mass of waste have been obtained. By means of the creation of a thermal load profile of a group of users it has been possible to determine the total energy extracted from the landfill and the electricity needed for the operation of the heat pump. The potential energy saving achievable with this type of plant was obtained by comparison with a ground source heat pump using horizontal pipes.