【作者】 李宁；

【导师】 闫秋会；

【作者基本信息】 西安建筑科技大学 ， 供热、供燃气、通风及空调工程， 2012， 硕士

【摘要】 目前，我国北方村镇供热采暖以分散式为主，不但会造成环境污染，而且能源利用效率低。因此，基于我国北方采暖地区太阳能丰富以及村镇生物质能源无需运输等特点，研发清洁的生物质锅炉辅助太阳能供热采暖系统，对形成具有我国特色的清洁、高效、低成本、可持续的村镇供热采暖模式，具有重要的现实意义。为了确定经济合理的辅助热源方案，本文以西安地区某村镇一栋单体住宅楼为例，对具有代表性的天然气锅炉、电锅炉、燃煤锅炉及生物质锅炉四种不同辅助热源的太阳能供热采暖系统进行比较研究，结果表明，在西安地区村镇利用生物质锅炉作为太阳能供热采暖系统的辅助热源是可行的。进而，利用TRNSYS软件，对本文设计的生物质锅炉辅助太阳能供热采暖系统参数进行优化。首先模拟了系统太阳能保证率随蓄热水箱容积和集热器面积配比值（Vt/Ac）的变化，根据西安地区的气象条件和水箱价位，得到不同水箱价位对应的最佳Vt/Ac值；之后，结合TRNSYS软件对系统太阳能保证率随集热器面积变化的模拟结果，利用费用年值法，确定出系统最佳集热器面积。本文通过对西安地区村镇太阳能供热采暖系统的设计、辅助热源的选择及系统优化，获得了适合西安地区村镇的节能、经济、低碳的特色供热采暖模式，对我国类似其它地区的供热采暖具有一定的借鉴价值。更多还原

【Abstract】 Currently, the heating systems in northern towns of our country are distributedprimarily. The traditional heating methods can not only cause environmental pollution,but also the energy efficiency is low. Therefore, based on the fact that solar energy isrich in heating area of north China and biomass energy doesn`t need transportation, toresearch and develop clean solar heating system with biomass boiler as its auxiliary heatsource, and to form clean,efficient,low cost and sustainable heating mode of our countryhas important practical significance.In order to determine the economic and reasonable plan of auxiliary heat source, thispaper took a monomer residential building in a town of Xi’an for an example, andcompared solar heating systems with four different auxiliary heat sources——gas boiler,electric boiler, coal boiler and biomass boiler.The results showed that using biomassboiler as the auxiliary heat source of solar heating system is completely feasible in thetowns of xi’an. Furthermore,TRNSYS software was used to optimize the designparameters of collector heating system with biomass boiler as its auxiliary heat source.Firstly,this paper simulated changes of the solar fraction over ratio of heat storage tankto collector area（Vt/Ac）. The best Vt/Ac corresponding to different water tank pricewas gotten according to the weather conditions and Water tank price in xi`an. Secondly,based on the TRNSYS simulation results of changes of the solar fraction over collectorarea, the best collector area of the system was determined using the method of annualcost.This paper provided a reference for the design of solar heating systems, theselection of auxiliary heat source and systems optimization. Meanwhile, it obtained acharacteristic heating mode which is energy-efficient, economic, low carbon and environmental in Xi’an area. It also has favourable reference value for other similarareas in our country.更多还原