共查询到20条相似文献,搜索用时 417 毫秒
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分别采用对4次相对湿度、4次含湿量、4次露点温度以及4次湿球温度进行直线插值或3次样条插值等8种计算方法生成的逐时相对湿度,从统计学和能耗模拟两个角度,与实测值进行对比分析。分析结果表明,由4次含湿量(或露点温度)进行线性插值计算生成的逐时相对湿度与实测相对湿度吻合较好;并据此给出了由逐时相对湿度根据关联性计算生成逐时含湿量、湿球温度、露点温度的方法。 相似文献
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《Planning》2017,(2)
克拉气田某处理厂采用三甘醇脱水工艺对原料气进行脱水处理,脱水后的干气水露点合格,但烃露点较高。由于天然气具有反凝析现象,随着干气在输送过程中压力的降低,会有液态烃析出,从而对管道、设备、下游用户造成不同程度的危害。为了达到合格的烃露点,避免液态烃的析出,根据我国国家标准对烃露点的不同规定,提出了烃露点控制的改进流程及两种烃露点的控制方案。使用HYSYS软件进行模拟比较,确定采用GB 17820-2012《天然气》对天然气烃露点的控制要求,以保证处理厂至轮南首站的外输管线内无液态烃析出。同时,对气-气换热器和低温分离器进行初步选型,并提出了反凝析现象的控制措施。 相似文献
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殷平 《建筑热能通风空调》1997,16(2):20-22,15
作为机器露点实验研究报告之二,作者根据大量的实验资料给出了喷水室机器露点的分布规律,分析了影响喷水室机器露点的各种因素。文章指出,由于目前采用的喷水室具有多种形式,不同形式的喷水室结构不同,热交换效率不同,因此其机器露点的分布规律亦不同。本文给出了国内最流行的三种形式的喷水室的机器露点分布规律。 相似文献
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通过对一燃气热水器进行效率测试,计算得出:将烟气温度降低到露点温度以下时,对烟气进行余热回收特别是潜热回收有重要的实际意义.热虹吸管冷凝换热器是增设在燃气热水器尾部烟道中的余热回收装置,可将排烟中大量的能量加以利用,从而提高热水器的效率. 相似文献
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LPG等压强制气化过程的再液化和水分冷凝 总被引:2,自引:1,他引:1
通过等压强制气化过程中各阶段液化石油气露点和水蒸气分压的计算,得出露点和水蒸气分压与环境温度、液化石油气成分之间的关系。分析了再液化或水分冷凝的可能性,提出了防范措施。 相似文献
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In radiant floor systems, the distribution of the floor surface temperature, which can be used to determine the mean temperature and the lowest/highest temperature of the floor surface, is an important parameter. The mean temperature of the floor surface determines cooling/heating capacity and indoor thermal comfort. The lowest surface temperature, which considers the dew point in an indoor environment, is a crucial factor in the prevention of condensation on a floor surface. The highest surface temperature is typically considered for local thermal comfort. In this paper, an analytical solution for heat transfer in a multilayer floor structure of a radiant floor system is proposed based on the analysis of the heat transfer process of a multilayer floor, equivalent thermal resistance and separation of variables method. The corresponding formulas are derived to estimate the distribution of floor surface temperature. The calculation results are validated by experiments. The calculation and experimental results show good accordance. The absolute error between the calculation and experimental results for floor surface temperature is within 0.3°C. A method for the calculation of the dimensionless temperature of the floor surface, which can be used for radiant heating and cooling systems, is provided. Using this proposed method, the distribution of floor surface temperature and the influence of floor structure parameters on the thermal performance of floors can be estimated and analyzed. 相似文献
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Dew point evaporative cooling system is an alternative to vapor compression air conditioning system for sensible cooling of ventilation air. This paper presents the theoretical performance of a novel dew point evaporative cooling system operating under various inlet air conditions (covering dry, moderate and humid climate) and influence of major operating parameters (namely, velocity, system dimension and the ratio of working air to intake air). A model of the dew point evaporative cooling system has been developed to simulate the heat and mass transfer processes. The outlet air conditions and system effectiveness predicted by the model using numerical method for known inlet parameters have been validated with experimental findings and with recent literature. The model was used to optimize the system parameters and to investigate the system effectiveness operating under various inlet air conditions. 相似文献
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针对烟气换热器壁面温度会低于排烟露点的情况,提出了正压通风燃气锅炉排烟热能利用系统。对排烟热能回收换热器热质交换进行了理论分析,提出了排烟热能回收换热器的设计计算过程,并对排烟热能利用系统进行了实验研究,阐述了工程应用中应注意的问题。 相似文献
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空调大温差研究(5):空调冷水大温差系统设计方法 总被引:4,自引:1,他引:3
就冷水机组、空调机组、水泵等的选择,介绍了空调冷水大温差系统的设计方法,指出空调冷水大温差系统与常规温差的空调系统有本质区别,应选用大温差专用空调机组,采用定露点设计法,水力计算宜采用优化设计,以使冷水大温差系统获得更佳的经济性。 相似文献