热力学中表示物质系统能量的一个状态函数，常用符号H表示。数值上等于系统的内能U加上压强p和体积V的乘积，即H=U+pV。焓的变化是系统在等压可逆过程中所吸收的热量的度量。 一个体系从状态1变化到状态2的过程中，若其焓值不变，则称之为等焓过程。 过程中所经历的状态可由热力学关系式和状态方程来确定，也可由Mollier图读得。 等焓过程有等温可逆膨胀，等温可逆压缩，Joule-Thomsond的节流过程。
等焓 [děng hán]
adj. isenthalpic
misc. isoenthalpy
双语例句原声例句
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本文利用一条等熵参考线和两个等焓偏导数建立了火箭发动机性能参数的外推公式。
In this paper, the extrapolation formulas of rocket engine performance parameters are established utilizing one isentropic reference line and two partial derivatives for fixed enthalpy.
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如果井口压力超过管道所需的压力，则可使气体通过节流件，以等焓焦耳-汤姆逊膨胀获取冷量。
If the wellhead pressure exceeds that of the pipeline, then the gas can be passed through a choke or throttled in a constant-enthalpy Joule-Thomson expansion to provide cooling.
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为此，利用基于BWRS状态方程的绝热节流模型计算了板876储气库回采天然气的高压节流温变等焓线。
At present, an adiabatic throttle model based on BWRS equation of state is used to obtain the temperature variation of Ban876 UGS's RNG at constant enthalpy condition.
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What we've been talking about, the Joule-Thomson experiment, constant enthalpy process?
首先，刚才说的，那些有什么问题吗？,焦耳-汤姆逊实验，等焓过程？
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And I want to make sure everybody figured out that it really was an irreversible expansion.
或者多孔塞的,不可逆的等焓过程。
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This is equal to zero. So this irreversible process this Joule-Thomson process, is a constant enthalpy process. Delta h for this process is equal to zero.
等于0。所以这个不可逆过程,也就是焦耳-汤姆逊过程,是一个等焓过程。
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