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地埋管地源热泵系统水平集管连管方式的研究 被引量:1
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作者 辛立明 高朋 +3 位作者 王玉超 朱永强 刘启明 甄璐莹 《制冷与空调(四川)》 2022年第3期517-522,共6页
地埋管地源热泵系统因土壤温度稳定、受环境影响小、不占用地上面积,且相对于地表水地源热泵和地下水地源热泵,维护和运行较为简单,故其应用越发广泛。以往的研究多注重竖直地埋管的布孔方式以及布孔深度的研究,而对于地埋管水平集管的... 地埋管地源热泵系统因土壤温度稳定、受环境影响小、不占用地上面积,且相对于地表水地源热泵和地下水地源热泵,维护和运行较为简单,故其应用越发广泛。以往的研究多注重竖直地埋管的布孔方式以及布孔深度的研究,而对于地埋管水平集管的连管方式相对较少。水平集管连管方式既影响地源热泵系统管路的水力平衡,还与施工过程的工程量相关。结合工程实例对地埋管地源热泵系统三种水平集管连管方式进行研究。结果表明:完全同程分散式连管方式总水力损失最大,异程集中式连管方式总水力损失最小;异程集中式连管方式,所需的PE管长度最小,钢管长度最大,施工开挖的土方量最小;局部同程分散式连管方式,所需的管长之和最小,施工开挖的土方量最大。 展开更多
关键词 地埋管地源热泵系统 施工工艺 水平管连管方式 对比分析
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西安地区GSHP地埋管换热关键影响因素测试
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作者 杨永健 《中国煤炭地质》 2023年第10期58-62,共5页
地下埋管换热器是地源热泵空调系统的核心部分,其换热性能的优劣直接影响地源热泵的工作效率和经济性能。西安地区以地表深厚黄土为显著特点,其地埋管换热量与其他地方具有明显差异。平均地温、换热器管径、连管方式、换热器型式、媒介... 地下埋管换热器是地源热泵空调系统的核心部分,其换热性能的优劣直接影响地源热泵的工作效率和经济性能。西安地区以地表深厚黄土为显著特点,其地埋管换热量与其他地方具有明显差异。平均地温、换热器管径、连管方式、换热器型式、媒介流速是影响换热器换热效果的几个主要因素,也是决定换热器换热量、影响地源热泵系统效率的最大因素。为了准确评判西安地区以上各因素对换热器换热量的影响,分析各因素的影响程度,本测试共施工了不同管径、不同型式的6口地源热泵换热井,经多次反复测试,测定各种组合形式的换热量,研究成果为地源热泵系统的优化设计和运行提供科学的参考依据。 展开更多
关键词 地源热泵 管径 连管方式 换热性能
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A Spatio-Temporal Odyssey Around the Concepts of Sustainable Development and Corporate Social Responsibility: Boundaries to Be Determined?
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作者 Azzedine Tounes Wafa Chakroun Fafani Gribaa 《Journal of Modern Accounting and Auditing》 2011年第10期1158-1168,共11页
The aim of this research is to analyze the emergence of the concepts of sustainable development (SD) and corporate social responsibility (CSR) in companies in time and space. A spatio-temporal reading will indicat... The aim of this research is to analyze the emergence of the concepts of sustainable development (SD) and corporate social responsibility (CSR) in companies in time and space. A spatio-temporal reading will indicate the most important socio-political and environmental events that have emerged with these two concepts. In order to complete the odyssey, a spatio-temporal analysis has retraced the epistemological evolution of these latter, whilst at the same time remarking the appropriation that has been made by the different institutional and organizational actors. The historical and epistemological reviews tell us that these two concepts, which came into existence almost 80 years, have indefinite outlines; one can be substituted for the other. However, thanks to this odyssey, we have reduced the boundaries even further between sustainable development and social responsibility and shown their theoretic and historical association. The perspective adopted shows that the concept of corporate social responsibility is closely connected to that of sustainable development. This connection means that researchers in management science are faced with more new problem issues reaching further than the simple lack of conceptual consensuses. 展开更多
关键词 corporate social responsibility eco-development spatio-temporal analysis sustainable development
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