Abstract A new flow calorimeter is developed to analyze the isobaric heat capacity of liquid. The characteristics of calorimeter have been studied at temperatures from 293 K to 353 K and pressures from 0.1 MPa to 15 MPa. The design of the calorimeter includes the innermost part of the calorimeter with two thick-walls, aluminum shields and microheater. The function of thick-walls with aluminum shields is to replace the conventional constant temperature bath for minimizing heat loss and precisely controlling the temperature of calorimeter. In order to verify the feasibility and reliability of the apparatus, the heat loss is checked by pure water under given pressure and various temperatures. The heat capacity of toluene, heptane and cyclohexane are measured at various temperatures and pressures. The experimentally measured data as a whole is in good agreement with the literature values available. Compared with the literature data, the experimental results by using the new calorimeter show that the deviations are less than 2%.

中文翻译：

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新型流动量热仪测定液体的等压热容

摘要 研制了一种新型流动量热仪，用于分析液体的等压热容。已在 293 K 至 353 K 的温度和 0.1 MPa 至 15 MPa 的压力下研究了量热计的特性。量热计的设计包括量热计的最里面部分有两个厚壁、铝制屏蔽罩和微型加热器。铝屏蔽厚壁的作用是代替传统的恒温槽，最大限度地减少热量损失，精确控制热量计的温度。为了验证装置的可行性和可靠性，在给定压力和各种温度下用纯水检查热损失。在各种温度和压力下测量甲苯、庚烷和环己烷的热容量。实验测量的数据作为一个整体与可用的文献值非常吻合。与文献数据相比，采用新型量热仪的实验结果表明，偏差小于2%。