So, when the gas (initially at the heater temperature T1) is compressed isothermally, it does not come into contact with the cooler, and in order to prevent the gas temperature from exceeding the ...

I don't understand why the reverse Carnot Cycle works. Let's consider the isothermal expansion of a gas (body). The gas does work, but its temperature remains constant. For this to happen, the gas ...

I am studying the derivation of Carnot's theorem that is outlined here. For the sake of this post, I will focus on (I) in the proof.In the proof, it is stated that we can run a carnot engine $E_C$ in ...

My question comes from another very simple question: If I want to heat my house by a electric heater or a heat pump driven by electricity, which cost me more? As far as I've learned, the efficiency of ...

Here is my best understanding of a 4-stroke engine $pV$ diagram:The net work done is (area of the main loop) - (area of the pumping loop).If you want to calculate the efficiency (assuming ideal gas) ...

I'm having trouble understanding the sign convention for chemical work in a thermodynamic cycle represented in the $(T, \mu)$ plane, where $\mu$ is the chemical potential and $T$ the temperature. The ...

Jet aircraft engines use gas turbines for power generation. We usually use the Brayton cycle to model it, but in the naïve interpretation, air goes in the front, gets compressed, fuel gets injected ...

In Kardar's Statistical Physics of Particles:An idealized heat engine works by taking in a certain amount of heat $Q_H$ ,from a heat source (for example a coal fire), converting a portion of it to ...

BackgroundTrying to understand how this equation for small heat transfers is obtained [quote is just slightly abbreviated]:From the first law of thermodynamics and the inner energy as a function of ...

In our syllabus we have discussed around the Carnot Cycle and his heat machine idea. From what I have understood until now, is that Carnot wanted to imagine the ideal heat machine, the one that ...

Efficiency of a 2-stroke spark-ignition IC engineThe slope of $\eta$ vs $r$ graph is steep at less $r$, so is it possible to use more than one cylinder, with less compression ratio with the nth ones ...

The Clausius Statement: "It is impossible to construct a device that OPERATES IN A CYCLE and produces no effect other than the transfer of heat from a heat source to sink". So, is a non-...

Consider$$e= \frac{T_h-T_c}{T_h}.$$What is $T_c$ in Carnot efficiency for internal combustion engine, atmosphere or exhaust temperature?If $T_c$ is atmosphere temperature, does that mean engine is ...

In a 4-stroke engine, it is extremely difficult to have high efficiency because the hot gases are not allowed to expand until they are atmospheric pressure. But what if they weren't expanding against ...

I'm trying to analyze a gaseous working fluid at the exit of the heating chamber as it heads to a nozzle in a Brayton cycle. My understanding is that the injection of heat creates a rise in internal-...