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In the Netherlands the greenhouse sector is a major user of energy. It accounts for 7% of the total national energy use and for 79% of the total energy use in agriculture. In order to sustain this sector on the long term, it is important that its use of energy is lowered. One way of reducing energy use by horticultural producers is investing in energy-saving systems. The purpose of this paper is to provide a better understanding of the investment behavior of firm operators in the adoption of energy-saving systems. Research objectives of the paper are (1) to analyze factors underlying the decision to invest, (2) to explore factors underlying the optimal size of investments. Three investment theories were used to construct an empirical model of investment. Consequently, this model was estimated in a two-stage procedure to analyze the factors influencing the decision of farmers to invest and the level of investments. The paper ends with policy implications. 相似文献
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[目的]介绍各种光源特性,筛选最佳大棚花卉生产补光灯配光方案。[方法]选用菊花切花生产为试材,采用白光复合光照,在大棚里配置高压钠灯、荧光节能灯、LED农业专用灯,根据3种灯具的光形特点和植物生长需求,进行实地测试,比较各种灯具的实际应用效果。[结果]结果表明,LED新型光源在整灯实际应用中节能效果明显优于其他两种灯具;LED方形灯具设计呈蝙蝠翼光形配光曲线最有利于温室实施有效布灯。[结论]LED农业专用补光灯优于目前最常用的钠灯,具有节能易布灯等特点,具有实际推广应用价值。 相似文献
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节能是我国经济和社会发展的一项长远战略方针,也是当前一项极为紧迫的任务,随着社会各项事业的长足发展,水、电、气、地等各种资源、能源消费需求与供给的矛盾日趋突出。节能型高校是宏观政府运用科学发展观,建立和谐社会在高校领域的一个长远规划,它需要从整体上建立高等学校校园运行节能监管体系。 相似文献
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采用脲醛树脂(UF)/聚合异氰酸酯(PDMI)组合胶黏剂,以不同的组合配比在较低热压温度(160℃)条件下用高含水率(9.0%)杂木刨花制备刨花板,检测其静曲强度、内结合强度以及2h和24h吸水厚度膨胀率。结果表明:聚合异氰酸酯(PDMI)的引入,可以显著提高刨花板的物理力学性能和耐水性能;将刨花终含水率提高至9.0%可节约刨花干燥能耗达13.0%以上;与脲醛树脂胶黏剂(UF)相比,使用PDMI/UF配比为1∶9的(10.0wt%PDMI)组合胶黏剂可以提高刨花板静曲强度80%,提高内结合强度150%;在不添加防水剂的条件下,可以将板材的2h吸水厚度膨胀率由31.0%提高至21.0%。该研究可为刨花板节能环保生产提供新思路。 相似文献
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简要介绍了植物纤维墙体材料的发展状况,阐述了其对建材业节能环保的重要意义,并对植物纤维墙体材料的应用前景进行了展望。 相似文献