Integrated systems for trigeneration and district energy: modelling, optimization and improvement

将热电联产系统，即同时生产热、冷、电与地区能源相结合，可以为社区、区域和国家提供有利的电力、供暖和制冷服务。尽管具有这些属性(例如，热电联产、区域能源)的系统的应用已经存在或正在规划中，但综合集成系统目前并不广泛。这种缺乏使用的部分原因是，对这类系统在所有运行条件下的行为和表现缺乏了解。由于这类系统及其运作的复杂性，因此必须对这些领域进行研究，并开发适当评估的工具。 拟议的研究旨在满足这些需求。目标是改进和优化现有的和计划中的综合热电联产地区能源系统的设计。适当的优化将建立在效率、经济和环境考虑的基础上。将考虑使用替代能源，以及使用火用分析等先进方法减少排放和提高效率的措施。研究计划的范围包括可靠性和安全性等其他因素。 所采用的方法将涉及热力学组件和系统的建模和模拟，包括能量以及热和流体流动方面。将制定包含多个目标和约束的优化例程。将考虑替代技术，例如先进的吸收冷冻机。将审查翻新和潜在的新系统的案例研究。 拟议的研究将产生各种好处，并对能源和建筑系统的工程产生重大影响，方法是改进/优化热电联产地区能源系统的设计并增加应用，更好地了解此类系统的行为，向社会提供效率更高、经济更好、环境行为更少的供暖、制冷和电力服务，并扩大加拿大经济这一部门的经济增长和就业。

The integration of systems for trigeneration, i.e., the simultaneous production of heat, cool, electricity, with district energy permits advantageous provision of electrical, heating and cooling services for communities, regions and countries. Although applications of systems with some of these attributes (e.g., cogeneration, district energy) exist or are planned, comprehensive integrated systems are presently not widespread. This lack of use is attributable, in part, to a poor understanding of the behaviour and performance of such systems over all operating conditions. The complexity of such systems and their operation makes essential research on these areas as well as the development of tools for proper assessments. The proposed research aims to address these needs. The objectives are to improve and optimize existing and planned designs for integrated trigeneration-district energy systems. The appropriate optimum will be based on efficiency, economic and environmental conisderations. The use of alternative energy resources will be considered, along with measures to reduce emissions and to enhance efficiency, using advanced methods such as exergy analysis. The scope of the research program includes other factors such as reliability and safety. The approach utilized will involve thermodynamic component and systems modelling and simulation, including energy as well as heat and fluid flow aspects. Optimization routines will be developed, incorporating multiple objectives and constraints. Alternative technologies will be considered, such as advanced absorption chillers. Case studies of retrofits and potential new systems will be examined. The proposed research will yield various benefits and greatly impact the engineering of energy and building systems, by leading to improved/optimal designs for trigeneration-district energy systems and increased applications, to better understanding of the behaviour of such systems, to the provision to society of heating, cooling and electrical services with enhanced efficiency, economics and reduced environmental behaviour, and to expanded economic growth and employment in this sector of Canada's economy.