应用热致变色玻璃对Venlo温室节能改造研究

Energy-saving reformation of Venlo greenhouse using thermochromic glass

中文关键词: Venlo温室  节能  热致变色玻璃  综合评价  碳减排

英文关键词: Venlo greenhouse  energy-saving  thermochromic glass  comprehensive evaluation  carbon emission reduction

中文摘要:

      针对严寒地区 Venlo 温室供暖与制冷能耗偏高的难题，创新性地将VO?热致变色玻璃应用于温室节能改造中以降低其制冷能耗。以典型 Venlo 温室为研究对象，研究热致变色玻璃的最佳安装位置以及温室不同部位玻璃的最优变色温度。明确各部位热致变色玻璃的最佳位置与变色温度后，为进一步降低供暖能耗，通过改变玻璃层数、中空气体层厚度及气体类型增加围护结构热阻，拟定了18种改造方案。运用熵值法，从节能、碳减排和成本等多目标维度对方案进行评估。结果表明：热致变色玻璃设置在围护结构最外侧方能发挥效用，可显著降低制冷能耗。温室不同位置的热致变色玻璃最佳变色温度各异，当东侧、北侧为 30℃，西侧、南侧与屋面为 40℃时，温室综合能耗最低。在 18 种方案中，Case (k) 为最优方案，其制冷节能率达 60.0%，供暖节能率 27.6%，综合节能率 39.5%，碳减排量 118,727.27kg，投资回收期 10.47 年，且能有效调控室内温度，利于农作物生长。研究成果为 Venlo 温室在严寒地区的节能改造提供有力的理论依据与技术支撑。

英文摘要:

      Aiming at the high energy consumption of heating and cooling in Venlo greenhouse in severe cold region, a VO2 thermochromic glass was innovatively introduced into the energy-saving reformation of greenhouse to reduce its cooling energy consumption. Taking a typical Venlo greenhouse as the research object, the optimal installation position of thermochromic glass and the optimal thermochromic temperature of glass in different parts of the greenhouse were studied. After determining the optimal position and discoloration temperature of thermochromic glass in each part, in order to further reduce heating energy consumption, 18 renovation cases were drawn up by changing the number of glass layers, the thickness of hollow gas layer and gas type, and increasing the thermal resistance of envelope structure. Using entropy method, the cases were evaluated from multi-objective dimensions such as energy saving, carbon emission reduction and cost. The results show that thermochromic glass can only be effective when it is placed on the outer side of the envelope, which can significantly reduce the refrigeration energy consumption. The optimal thermochromic temperature in different parts of the greenhouse is different. When the temperature is 30℃ in the east and north, and 40℃ in the west, south and roof, the comprehensive energy consumption of the greenhouse is the lowest. Among the 18 cases, Case (k) is the best case, with energy-saving rate of 60.0% for cooling, 27.6% for heating, 39.5% for comprehensive energy-saving, 118,727.27kg for carbon emission reduction, and payback period of 10.47 years. Moreover, it can effectively control indoor temperature and is beneficial to crop growth. The research results provide a strong theoretical basis and technical support for the energy-saving transformation of Venlo greenhouse in cold regions.