Simulation of an alternative energy system for district heating company in the light of changes in regulations of the emission of harmful substances into the atmosphere.

At the present time Poland is going through a lot of changes, also from the energy generation and energy law point of view. In the nearest future the polish energy industry, according to the EU 2020 Climate and Energy Package, will have to significantly modernize most of its power plants. Dynamically changing situation results in higher demand for different, both energy and economy, analyses helping with setting the frames for future functioning of power engineering companies.One of the polish power companies, PEC Legionowo, is reshaping its infrastructure to meet the new requirements and from this particular company authors are using data for test case. The first conceptual work related to the development of the PEC Legionowo energy system is underway in terms of increasing its energy efficiency and reducing harmful exhaust emissions. Due to the need of significantly reducing exhaust emissions by 2022, PEC Legionowo is seriously considering the reduction of the heat generative power from coal-fired boilers. Among others the resulting energy gap is planned to be covered by installing high-efficiency combined heat and power (CHP) systems.The article analyzes and verifies the model of an existing CHP plant and checks the modernization possibilities of the existing installation in terms of reducing the emission of harmful gases to the atmosphere. The new installation of gas boilers designed to replace coal-fired boilers is checked to meet the new emission requirements, while maintaining the demand for heat and electricity.For the modelling a test case the combined techno-economic optimization and analysis software energyPRO is used. The software optimizes the operation of the modelled system in accordance to all input conditions such as generation and economic data obtained from a functioning heat and power plant in polish industry.The results show the quantitative and economic difference related to the introduced changes in the heat and power plant system. The analysis also focuses on the size of the investment outlay and the return time of the project.

当前，波兰正经历诸多变革，在能源生产与能源法领域亦是如此。短期内，根据欧盟2020气候与能源一揽子计划，波兰能源行业需对其大部分电厂进行大规模现代化改造。动态变化的形势导致对各类能源与经济分析的需求上升，这些分析有助于为电力工程企业未来的运营设定框架。

波兰电力公司PEC Legionowo正重塑其基础设施以满足新要求，作者使用该公司的数据作为测试案例。PEC Legionowo能源系统发展的首批概念性工作已启动，重点在于提高能效与减少有害废气排放。由于需在2022年前大幅减少废气排放，PEC Legionowo正认真考虑降低燃煤锅炉的供热功率。其中，计划通过安装高效热电联产（CHP）系统来填补由此产生的能源缺口。

本文分析并验证了现有热电联产（CHP）厂的模型，同时检查了现有设施在减少大气有害气体排放方面的现代化可能性。新设计的燃气锅炉装置需替代燃煤锅炉，需确保其满足新排放要求，同时维持热电需求。

在测试案例建模中，使用了技术经济优化与分析软件energyPRO。该软件根据所有输入条件（如从波兰行业内运行的热电厂获取的生产与经济数据）优化模型系统的运行。

结果显示了热电厂系统变革带来的定量与经济差异，分析还关注了投资规模与项目回报周期。