Nearly all energy conversion systems, and especially electricity generation plants do not operate at nominal conditions throughout their useful life: periodic or semi-periodic changes in the availability of the resource affect solar (thermal and PV), wind, hydraulic and geothermal plants, which in reality operate at off-design conditions for most of their life. To a smaller scale, fossil-fuelle...

We use fuel oil as an alternative in compression ignition engines without modification. In this study, we performed tests at different engine speeds using diesel blends a engine. Energy and exergy analysis was carried out the performance emission values got from these tests. Through energy analysis, distribution of determined thermal efficiency calculated. The highest is 34.76% on F40 2250 rpm....

biomass co-firing with lignite represents an attractive solution for operating lignite-fired thermalpower plants (tpp) with the dual advantage of using local renewable resources and simultaneously reducingemissions. the subject of this study is technical and environmental investigation of the feasibility of the cofiring of soma lignite with some dried agricultural residues in the soma thermal p...

This paper discusses whether the exergy destruction minimization or energy efficiency maximization comes first in resolving climate emergency problem and provides sustainable solution options regarding 2nd Law of thermodynamics. It has been shown that low-temperature district systems with renewable sources waste heat are effective minimizing destructions, while a secondary impact. The research ...

The objectives of this study are to (a) evaluate the exergy and energy demand for constructing a hydrofractured shale gas well and determine its typical exergy and energy returns on investment (ExROI and EROI), and (b) compute the gas flow and intrinsic exergy analysis in the shale gas matrix and created fractures. An exergy system analysis of construction of a typical U.S. shale gas well, whic...

biomass co-firing with lignite represents an attractive solution for operating lignite-fired thermalpower plants (tpp) with the dual advantage of using local renewable resources and simultaneously reducingemissions. the subject of this study is technical and environmental investigation of the feasibility of the cofiring of soma lignite with some dried agricultural residues in the soma thermal p...

In the present research, energy in geothermal fluid is utilized to generate power. first case of power generation, model double-effect instantaneous evaporation cycle employed, and second one, single-effect combined Rankine with different organic fluids are utilized. The effect several examined. SPECO method has also been applied economic analysis. Given analysis, net generation highest for wat...

This paper presents an abbreviated method for estimating exergy destruction in a heat exchanger, requiring only black-box data of the exchanger’s inputs and outputs, and eliminating part of the mathematical difficulties associated with the calculations. A well-known model for temperature distributions in an exchanger is adapted for this case, and is used to distinguish between the contributions...