Solar and pellet combisystem for apartment buildings: Heat losses and efficiency improvements of the pellet boiler
Solar and pellet combisystem for apartment buildings: Heat losses and efficiency improvements of the pellet boiler
复制标题
公寓楼的太阳能和颗粒组合系统：颗粒锅炉的热损失和效率改进
DOI：
10.1016/j.apenergy.2012.03.049
复制
发表时间：
2013
期刊：
影响因子：
11.2
通讯作者：
M. Rošā
中科院分区：
文献类型：
--
作者：
A. Žandeckis;L. Timma;D. Blumberga;C. Rochas;M. Rošā
本文基于对拉脱维亚锡古尔达一栋 4 层公寓楼安装的太阳能组合系统的分析。该组合系统由：42m2平板太阳能集热器、2.35m3蓄热罐和辅助加热器100kW颗粒锅炉组成。本文重点研究颗粒锅炉热性能的优化。在 25kW 颗粒锅炉的实验室测试中，确定了助燃空气的供应比例、烟气中的化学和热损失对锅炉性能的影响。结果证明了最佳热性能、CO 排放、化学和热损失，这些都与烟气中的游离氧 (O2) 量有关。然后将实验室测试的结果用于优化 100kW 颗粒锅炉的运行。对 100kW 锅炉进行烟气测量，以确定 O2 浓度、CO 排放量和烟气温度。结果表明，优化性能所需的是减少供应到锅炉燃烧室的空气量。对锅炉的控制算法进行了更改，以达到预期的结果。此外，通过改变进气点的位置也提高了锅炉性能。通过修改锅炉的控制算法来降低蓄热罐的温度。
This paper is based on the analysis of the solar combisystem installed in a 4-storey apartment building in Sigulda, Latvia. The combisystem consists of: 42m2of flat plate solar collectors, a 2.35m3accumulation tank and a 100kW pellet boiler as the auxiliary heater. This paper focuses on the optimisation of the thermal performance of the pellet boiler. During laboratory tests on the 25kW pellet boiler, the influence of the supply ratio of the combustion air, the chemical and heat losses in the flue gases on the performance of the boiler was established. The results demonstrate the optimum thermal performance, CO emissions, chemical and heat losses, which are related to the amount of free oxygen (O2) in the flue gases. The results of the laboratory tests were then applied to optimise the operation of the 100kW pellet boiler. The flue gas measurements for the 100kW boiler were performed in order to identify the O2concentration, CO emissions and flue gas temperature. The results showed that what is required to optimise performance is to reduce the amount of air supplied to the boiler’s combustion chamber. Changes were made to the boiler’s control algorithms to achieve the desired result. Additionally, boiler performance was improved by changing the location of the air intake point. Decreasing temperatures in the heat accumulation tank were achieved by making modifications to the boiler’s control algorithms.