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首页> 外文期刊>Acta Horticulturae >Conversion of a high-demanding thermal-energy level greenhouse from conventional oil heating system to wood-based renewable sources heating system for tropical plants production in Mediterranean conditions.
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Conversion of a high-demanding thermal-energy level greenhouse from conventional oil heating system to wood-based renewable sources heating system for tropical plants production in Mediterranean conditions.

机译：将高要求的热能级温室从传统的油加热系统转换为木质的可再生资源加热系统，以在地中海条件下生产热带植物。

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摘要

Ornamental plant production under protected conditions is one of the most energy-consuming sector of agriculture. In Mediterranean regions, growers are faced with rising costs for microclimate control. The situation is worse in high-quality cultivations as tropical flowers where the reduction of energy inputs is not always sufficient to restore profitability. Also investing in new low-energy consuming greenhouses is not always achievable due to the high initial costs. The optional strategy presented is to investigate cheaper fuels. A study case was analysed considering a commercial installation located in Liguria Region, Italy, specialized in moth orchids (Phalaenopsis spp.) production. The greenhouse plant was very traditional with 20-year-old steel, single glass gutter-connected frame, 3 m maximum height and 4 124 m2 total floor area articulated in six productive units (PU). The heating schedule was programmed for 12 months year-1 heating. Three temperature regimes were adopted (15-18 degrees C; 18-20 degrees C and 23-26 degrees C); five PU were provided with thermal screens. The conventional heating system was based on a central diesel oil boiler 1.16 MWt power and an under-bench hot water pipes system. The oil consumption resulted 126,000 kg year-1 ranging from 1,680 kg month-1 (July) and 18,480 kg month-1 (January) with a specific yearly cost of 23.6 to 27.3 Euro m-2. Any investment focused in oil saving was evaluated unfeasible in comparison with the use of a cheaper fuel without changing the frame structure. A biomass boiler 1.39 MWt power was added to the conventional one. A pre-insulated thermal pipe with reduced number of pipe joints was used to deliver hot water inside the greenhouses. The biomass boiler was fed both with wood chips coming from certified forests (FSC, Forest Stewardship Council) management standard located at distances <40 km and sawdust pellets lowering the yearly specific cost to expected value of 14-16 Euro m-2. Detailed cost analysis and management aspects are provided.
机译：受保护条件下的观赏植物生产是农业中最消耗能源的部门之一。在地中海地区，种植者面临着微气候控制成本上升的问题。在作为热带花卉的高质量栽培中，情况更加糟糕，减少能源输入并不总是足以恢复利润。由于高昂的初始成本，并非总能实现对新的低能耗温室的投资。提出的可选策略是研究更便宜的燃料。分析了一个研究案例，并考虑了一个位于意大利利古里亚地区的商业装置，该装置专门用于蝴蝶兰（蝴蝶兰）的生产。温室植物非常传统，具有20年历史的钢结构，单玻璃檐槽连接框架，最大高度3 m和6个生产单元（PU）铰接的总建筑面积4 124 m 2 。加热时间表被编程为1年12个月的加热时间。采用了三种温度模式（15-18摄氏度; 18-20摄氏度和23-26摄氏度）;以及五个PU配有隔热屏。传统的供暖系统是基于中央柴油锅炉1.16 MW t 的功率和台下热水管系统。每年的石油消耗量为126,000千克 -1 ，范围从1680千克每月 -1 （7月）到18480千克每月 -1 （1月），每年的特定成本为23.6至27.3欧元m -2 。与使用更便宜的燃料而不改变车架结构相比，任何专注于节油的投资都被认为是不可行的。在传统的锅炉中增加了1.39 MW t 的生物质锅炉。使用减少了管道接头数量的预绝缘热管在温室内输送热水。给生物质锅炉供应来自距离<40 km的经认证的森林（FSC，森林管理委员会）管理标准的木屑和木屑颗粒，将每年的单位成本降低至14-16 Euro m -2的期望值。提供了详细的成本分析和管理方面。

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