Long Term Performance of Ground Source Heat Pump Systems

地源热泵系统提供了一种可持续的方式，通过使用地面作为季节性储热来减少建筑物的供暖和制冷需求。进入热库的途径是通过地面热交换器，然后将其连接到热泵和建筑物供热和制冷输送系统。性能良好的地源热泵系统应该可以提供大约四个或更多的效率，这意味着大量的能源节约。然而，政府机构和其他研究人员对安装后性能的研究表明，在许多情况下，这种程度的能源效率并未实现。这种不佳的表现可能是由于许多原因，包括设计或规范问题、不适当的控制系统，或最终建筑使用与设计阶段假设不兼容。这些问题都可能因在入住前准确确定建筑物的热需求而变得更加复杂。从历史上看，英国的地源热泵系统在安装时没有考虑到任何后续监测。这意味着，关于设计和运营的宝贵经验教训还没有学到。GI Energy Ltd和利兹大学一直在收集一些已安装的地源热泵系统的性能数据。这提供了一个无与伦比的机会，可以评估当前设计和控制系统在日常使用中的适当性，将运行条件与设计期间假设的条件进行比较，并为未来更好的实践提出建议。PHD项目将解读英国一些运行中的地源热泵系统的能量性能，并确定成功方案所涉及的因素。对建筑数据集的分析还将允许基于实际性能的设计方法的系统验证，这是行业目前缺乏的。该项目的目标是：1.将分析方法应用于案例研究建筑的数据集，以确定热泵系统的性能，以及性能不佳/性能过高的潜在原因；2.开发和验证建筑和地面热交换器模型，以探索性能较差的原因，并测试现场数据集中没有的情景。3.制定可转让建议的摘要，以优化热泵系统的性能；4.设计智能监测系统和监测制度，纳入这些建议，以实现更高的效率。该项目将引起建筑开发商、地源供热中小企业、建筑设计师和运营商的兴趣，他们将能够利用这些成果来实现更好的建筑节能性能。

Ground source heat pump systems offer a sustainable way to reduce heating and cooling demand for buildings through the use of the ground as a seasonal thermal store. Access to the thermal store is made via ground heat exchangers, which are then connected to a heat pump and the building heating and cooling delivery system. Well performing ground source heat pump systems should offer efficiencies of around four or more, meaning substantial energy savings. However, studies of post installation performance by government agencies and other researchers suggest that this degree of energy efficiency is not being realised in many cases. This underperformance may be due to a number of reasons including, problems with design or specification, inappropriate control systems, or final building use incompatibility to design stage assumptions. These issues can all be compounded by the difficulty of accurately determining the thermal demand of buildings before their occupancy. Historically, ground source heat pump systems in the UK have been installed without any due regard to following up monitoring. This has meant that valuable lessons about design and operation have not been learnt. GI Energy Ltd and the University of Leeds have been gathering performance data for a number of installed ground source heat pump systems. This offers an unrivalled opportunity to assess the appropriateness of current design and control systems in routine use, compare operational conditions to those assumed during design and to make recommendations for better practice in the future. The PhD project will interpret the energy performance of a number of operating ground source heat pump systems in the UK and determine the factors involved with successful schemes. Analysis of datasets from the buildings will also allow systematic validation of design approaches based on real performance, something currently lacking in the industry.The project aims are to:1. Apply analytical method to data sets from case study buildings to determine the performance of the heat pumps systems, and potential causes for underperformance/over-performance;2. Develop and validate building and ground heat exchanger models to explore the reasons behind the underperformance, and to test scenarios not available from the field datasets. 3. Create a summary of transferrable recommendations to optimise performance of the heat pump systems; 4. Design a smart monitoring system and monitoring regime, incorporating the recommendations to achieve greater efficiencies. The project will be of interest to building developers, ground source heat SMEs, building designers and operators who will be able to use the results to achieve better building energy performance.