Yazarlar
- Askin, M.(2)
- Aydogdu, O.(2)
- Salti, M.(2)
- Askin, Muzaffer(1)
- Aydogdu, Oktay(1)
- Salti, Mustafa(1)
- Zengin, B.(1)
Yayınlar
- MakaleYalnız künye2023Scopus SJRQ3Thermal Device Beyond the Carnot Limit
Zengin, B.; Askin, M.; Salti, M.; Aydogdu, O.
Based on the Carnot cycle, we construct a theoretical heat engine working through the agency of the generalized polytropic gas. A heat engine described by using a thermodynamic equation-of-state defines a thermodynamical relation among state quantities such as internal energy U, volume V, entropy S, temperature T and heat capacity C. Investigating the thermal efficiency of the constructed heat engine shows that more efficient heat engine is obtained from the Carnot heat engine when the pressure of the working material takes certain values.
AtıfOpenAlex1
İncele - MakaleYalnız künye2019Scopus SJRQ2Polytropic Carnot heat engine
Askin, M.; Salti, M.; Aydogdu, O.
Recent astrophysical datasets have implied that the universe has entered a speedy expansion phase. The Polytropic gas model, which describes a unified formulation of dark contents (matter plus energy), is one of the most reasonable definitions of this mysterious phenomenon. This interesting formulation allows to simulate the dark contents in the cosmic form of the perfect fluid and gives an interesting point of view in the discussion of fundamental theories of physics. In the first step of our investigation, we discuss the thermal equation-of-state (EoS henceforth) and obtain the EoS and deceleration parameters as explicit functions of temperature. Subsequently, we obtain a relation for the thermal efficiency of the Carnot heat engine which depends on free parameters given in the cosmological Polytropic gas description and the limits of maximal and minimal temperatures imposed on the Carnot cycle.
AtıfScopus8WoS8OpenAlex9İncele - MakaleYalnız künye2017Scopus SJRQ2Cosmology via thermodynamics of polytropic gas
Askin, Muzaffer; Salti, Mustafa; Aydogdu, Oktay
We study cosmological scenarios of the polytropic gas (PG) dark matter-energy proposal in a Friedmann-Robertson-Walker (FRW) Universe. As a first step, we obtain an exact expression for the energy density of PG model by making use of the thermodynamics. Later, we investigate some cosmological quantities and perform neo-classical analyzes. Finally, we implement a connection between the PG and a homogenous minimally coupled scalar field by introducing its self-interacting potential.
AtıfScopus10WoS10OpenAlex13İncele