The most common energy application for biogas is on-site power generation using gas engine units. The introduction of a bottoming cycle based on Scroll expander Organic Rankine Cycle (ORC) technology within a biogas plant is of high interest since the excess heat produced by biogas engines can be used to produce additional power. This paper describes the retrofit of a plant consisting of a dige...

A novel high-efficiency device comprised of three subsystems, a solar collector, sodium thermal electrochemical converter, and non-recuperative Brayton heat engine, is modeled by taking into account the main internal external irreversibility sources. The model extends previous works in which waste converter used as input gas turbine to study its performance feasibility when energy added. operat...

Gas turbines play an important role in supplying power for the country especially in peak electricity load. The main disadvantages are the turbines, they produce large changes are a result of climate change. However, in times of peak electricity grid and at the same time warm months, can produce gas turbines under the effect of ambient temperature, the amount of reduced considerably. The method...

To determine the amount of air pollutants, produced by Iranian automakers, and compare it with old and retrofitted vehicles have become one of the important tools of urban management. The present research uses International Vehicle Emission (IVE) modeling software in order to verify SAIPA Co. fleet emissions, based on Euro 4 emission standard (SAIPA Co. recognized as a superior Iranian brand in...

In the present study, energy and exergy analyses of a simple supercritical, split supercritical cascade CO2 cycle are conducted. The bottoming cycles coupled with main two-stroke diesel engine 6800 TEU container ship. An economic analysis is carried out to calculate total capital cost these installations. functional parameters optimized minimize electricity production (EPC) using genetic algori...