...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy for sustainable development >Comparing fossil CO_2 emissions from vegetable greenhouses in Canada with CO_2 emissions from importing vegetables from the southern USA
【24h】

Comparing fossil CO_2 emissions from vegetable greenhouses in Canada with CO_2 emissions from importing vegetables from the southern USA

机译：比较加拿大蔬菜大棚的化石CO_2排放量与美国南部进口蔬菜的CO_2排放量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The energy consumption and fossil CO_2 emissions from the Canadian vegetable greenhouse industry were assessed using greenhouse statistics from 2002 to 2007. The fossil CO_2 emissions were compared to the fossil CO_2 emitted during transport of an equal weight of food by truck and by airplane from two horticultural production centers in the southern USA to four locations in Canada. The calculations in this paper for Canadian greenhouse energy use for heating were verified against farm energy use survey data collected from greenhouse operators in 1996. Allowing for extrapolations to 1996 from the 2002 to 2007 period, the survey data were underestimated by 12%. Since the survey data were not corrected for possible household energy use by greenhouse operators, some underestimation in the heat energy calculations was expected. The fossil CO_2 emissions from Canadian greenhouses were 0.35 Tg. This estimate is about twice as high as the diesel fuel CO_2 emissions required to truck the same weight of vegetables from south to north, but only slightly less than half the CO_2 emissions to ship the same vegetables by air. Quebec greenhouse crops had the lowest CO_2 emission intensity and the least difference with trucking CO_2 emissions, while BC greenhouse crops had the highest CO_2 emission intensity and the most difference with trucking CO_2 emissions. The study revealed some potential CO_2 mitigation practices including alternative fuels such as straw pellets or wood chips, non-recyde-able combustible urban waste and biogas from city waste treatment facilities or manure storage systems. Mitigation of heat energy loss could involve insulating heating lines within greenhouses and doorway designs that minimize the time and area open to the outside air. In order to reduce the CO_2 emission intensity, research should aim at a higher ratio of yield to fossil energy use, rather than simply trying to maximize greenhouse yields.
机译：使用2002年至2007年的温室统计数据评估了加拿大蔬菜温室产业的能源消耗和化石CO_2排放。将化石CO_2排放与卡车和飞机从两个园艺场运输等重量食物过程中排放的化石CO_2进行了比较。美国南部的生产中心到加拿大的四个位置。本文针对加拿大温室供暖能源使用的计算与1996年从温室经营者收集的农场能源使用调查数据进行了验证。考虑到2002年至2007年期间的1996年的推断，调查数据被低估了12％。由于未针对温室经营者可能的家庭能源使用对调查数据进行校正，因此预计热能计算会被低估。加拿大温室中化石的CO_2排放量为0.35 Tg。该估算值大约是从南向北运输相同重量蔬菜所需的柴油CO_2排放量的两倍，但仅比空运相同蔬菜的CO_2排放量少一半。魁北克温室作物的CO_2排放强度最低，与卡车运输的CO_2排放差异最小，而卑诗省温室作物的CO_2排放强度最高，与运输的CO_2排放差异最大。该研究显示了一些潜在的CO_2缓解措施，包括替代燃料，例如秸秆颗粒或木屑，不可回收的可燃城市废物以及来自城市废物处理设施或粪便存储系统的沼气。减少热能损失可涉及在温室和门口设计中对加热线进行保温，以最大程度地减少向外界空气开放的时间和面积。为了降低CO_2的排放强度，研究应针对更高的产量与化石能源利用比例，而不是简单地试图使温室产量最大化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号