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Comparison of natural gas driven heat pumps and electrically driven heat pumps with conventional systems for building heating purposes

机译：天然气热泵和电动热泵与用于建筑物供热的常规系统的比较

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摘要

Electrically driven heat pumps achieve good efficiencies for space heating. If heat pumps are driven directly by a combustion engine instead of an electric motor, losses attributed to the production and transport of electricity are eliminated. Additionally, the use of the combustion engine's heat leads to a reduced temperature difference across the heat pump. This article presents annual efficiencies of these systems and compares internal combustion engine and electrically driven heat pumps in terms of primary energy consumption and CO_2 emissions. Because heat pump performance depends strongly on the heating circuit's flow temperature level, the comparison is performed for air-to-water and geothermal heat pump systems in two cases of maximum flow temperatures (40 ℃ and 60 ℃). These temperature levels represent typical modern buildings with large heating surfaces and older buildings with high-temperature radiators, respectively. In addition to the different heat pump setups, conventional space heating systems are included in the comparison. The calculations show that natural gas-driven heat pumps achieve about the same efficiency and CO_2 emissions as electrically driven heat pumps powered with electricity from the most modern natural gas-fired combined cycle power plants. The efficiency of such systems is about twice that of conventional boiler technologies.
机译：电动热泵在空间供暖方面具有良好的效率。如果热泵直接由内燃机而不是电动机驱动，则可消除因电力生产和运输而造成的损失。另外，使用内燃发动机的热量可降低热泵两端的温度差。本文介绍了这些系统的年效率，并从一次能源消耗和CO_2排放方面比较了内燃机和电动热泵。由于热泵性能在很大程度上取决于加热回路的流动温度水平，因此在两种最高流动温度（40℃和60℃）的情况下，对空气-水和地热热泵系统进行了比较。这些温度水平分别代表具有大采暖面积的典型现代建筑和具有高温散热器的老式建筑。除了不同的热泵设置之外，比较中还包括传统的空间加热系统。计算结果表明，天然气驱动的热泵的效率和CO_2排放量与电动驱动的热泵大致相同，而电动驱动的热泵则来自最先进的天然气联合循环发电厂。这种系统的效率大约是传统锅炉技术的两倍。

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  • 来源
    《Energy and Buildings》 |2010年第6期|p.904-908|共5页
  • 作者

    J. Brenn; P. Soltic; Ch. Bach;

  • 作者单位

    Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Internal Combustion Engines. UEberlandstrasse 129, 8600 Duebendorf Switzerland;

    rnEmpa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Internal Combustion Engines. UEberlandstrasse 129, 8600 Duebendorf Switzerland;

    rnEmpa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Internal Combustion Engines. UEberlandstrasse 129, 8600 Duebendorf Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    natural gas engine; heat pump; space heating; boilers; modelling; central europe; building's heating circuit;

    机译：天然气发动机热泵;空间供暖;锅炉;造型;欧洲中部;建筑物的加热回路;

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