Mean temperature difference for countercurrent flow and cocurrent flow in steady continuous heat transfer has been deduced uniformly. 采用统一的方法对定态传热逆流和并流的平均温差进行了推导。热是由于温度差造成的能量传递。
In the deducing process, no specific flow mode is presupposed, and the conclusion of temperature subtracting by the same side for logarithmic mean temperature difference can be easily drawn. 推导过程无需假定冷热流体的特定流向,并利于得到对数平均温差同侧相减的规律。
Analysis and Application of Weighted Mean Temperature Difference for Condenser 冷凝器加权平均温差原理分析及应用
Influence of logarithmic mean temperature difference on heat transfer area of heat exchangers 对数平均温度差对换热器传热面积影响
Influence of Changes of Mean Temperature Difference on Heat Absorption Deviation and Its Application in Boiler Reconstruction 平均温压变化对吸热偏差的影响及在锅炉改造中的应用
The incidence and mortality of liver cancer were higher in the people who lived in both the mound land and the flat country where the annual mean temperature difference was great and the metamorphic rock and friable rock of quaternary system were seen; 研究结果表明,年平均温差大,变质岩和第四系松散岩分布的岗地、平原地区、所居住的人群中肝癌的发病率和死亡率高;
Analytical formulas for logarithmic mean temperature difference and heat-exchange area 计算流体对数平均温差和换热面积的解析式
The mean temperature difference of CROSS-FIOW heat exchangers with one fluid mixed and the other unmixed together with an improved mathematical model better describing the heat transfer process in the exchanger 垂直环管内紊流同向混合对流放热过程试验研究一侧流体混合,一侧流体不混合的叉流换热器的平均温差和改进的数学模型
Nanjing's linear trend is basically similar to all China's trend in mean temperature, but there is also some difference. 与全国平均温度相比,线性变化趋势大体相似,但也存在一定差别。
This article discusses the calculation of heat flux in the evaporator, in order to improve the conventional logarithmic mean temperature difference method. 本文讨论表面式蒸发器管路内热流密度计算,以改进传统的对数平均温差法。
Minimum redundance rate of heat exchange area is the product of variation of heat flux and mean temperature difference of heat exchanger caused by temperature change. 最小换热面积富裕系数为温度变化引起换热量变化及换热器平均温差变化两部分的乘积。
According to the relationship between the logarithmic mean temperature difference correction factor and the inlet and outlet temperatures of the exchanger, the maximum temperature cross extent of the exchanger which has single shell and even tube pass at the operable condition is pointed out. 根据换热器对数平均传热温差校正因子与换热器进出口温度之间的关系,指出了单壳程偶数管程换热器在可操作条件下的最大温度交叉程度。
The correlation index between protein content and sedimentation volume decreased with mean temperature and daily temperature difference increasing during grain filling. 随着灌浆期日均温的升高以及日较差的增大,蛋白质含量与沉淀值的相关系数减小;
The Calculation of Mean Temperature Difference in Strength Design of Single-pass Fixed Sheet Heat Exchanger 单程固定管板式换热器强度设计中平均温度差的计算
INVESTIGATION ON INTEGRAL MEAN TEMPERATURE DIFFERENCE OF HEAT TRANSFER Discussion on Approximation of Coulomb Correct Factor 积分平均传热温差的探讨库仑校正因子近似处理的比较
The proposed approximate equations of logarithmic mean temperature difference in the literatures are discussed, it is pointed out that Chen J J J's approximate equation is suitable to the optimum design of heat exchanger. 对有关文献中已提出的近似计算方法进行了讨论,指出ChenJJJ提出的近似方程最适合于应用在换热器的优化设计中。
Based on the above temperature model, a novel method of designing heat exchanger margin was studied by computing the local and total Effective Mean Temperature Difference ( EMTD). 基于以上温度模型,通过计算换热器局部温度差和整体有效平均温度差,探讨计算换热器富余量的设计方法。