Publication

Energetic investigation of Saccharomyces cerevisiae during transitions. Part 2. Energy balance and thermodynamic efficiency

Urs von Stockar
1995
Journal Articles

Abstract

The technique for evaluating the material balance during transitions was presented in Part 1 of this series. In the present paper we investigate the energy balance in order to det. the consistency of the data. The same statistical test as used for the material balance can be applied to evaluate the error and, potentially, to reject the data consistency. Energy efficiency is calcd. using cumulative quantities, and our results show that the efficiency based on the enthalpy and on the free energy remained const., even for a changing metab. The results reported complete the data on themodynamic efficiency at steady state under various growth conditions. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/9c70985b-64dc-4c6f-a747-0678a8f47e4f

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Urs von Stockar
1995
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9c70985b-64dc-4c6f-a747-0678a8f47e4f

About this result

Related concepts (31)

Thermal efficiency

In thermodynamics, the thermal efficiency () is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc. For a heat engine, thermal efficiency is the ratio of the net work output to the heat input; in the case of a heat pump, thermal efficiency (known as the coefficient of performance) is the ratio of net heat output (for heating), or the net heat removed (for cooling) to the energy input (external work).

Detailed balance

The principle of detailed balance can be used in kinetic systems which are decomposed into elementary processes (collisions, or steps, or elementary reactions). It states that at equilibrium, each elementary process is in equilibrium with its reverse process. The principle of detailed balance was explicitly introduced for collisions by Ludwig Boltzmann. In 1872, he proved his H-theorem using this principle. The arguments in favor of this property are founded upon microscopic reversibility.

Energy conversion efficiency

Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. Energy conversion efficiency depends on the usefulness of the output. All or part of the heat produced from burning a fuel may become rejected waste heat if, for example, work is the desired output from a thermodynamic cycle.

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Energetic investigation of Saccharomyces cerevisiae during transitions. Part 2. Energy balance and thermodynamic efficiency

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