Ahmed M. Khaira

Tanta University · Department of Mechanical Power Engineering

The rapid increase in energy consumption around the world is the main challenge that compromises and affects the environment. Electricity generation, which mainly depends on fossil fuels, produces around 80% of CO2 emissions released into the atmosphere. Renewables are a remarkable alternative for energy production. However, they are intermittent s...

The present study aims to construct an innovative configuration of a desiccant air conditioner that achieves thermal comfort conditions with the lowest electrical power consumption rates. To achieve this, an innovative configuration of a desiccant dehumidifier channel with multi-stages of silica-gel pads and heat exchangers for inter-cooling (DDC-M...

The present study aims to develop an innovative hybrid system powered by solar energy to dry plants and produce pure water, suitable for remote regions that suffer from power problems and the problem of lack of pure drinking water. This was done by integrating a two-stage dryer unit with modified solar still with an air injection system and externa...

The present study aims to innovate small hybrid desalination plants suitable for remote regions working with higher productivity and lower cost of the produced fresh water. To achieve this idea, the small RO desalination plant was combined with the solar still, as well as this innovative hybrid desalination system was combined with the photovoltaic...

The desiccant air conditioning system has multiple advantages (e.g., no use of ozone-depleting refrigerants, highly efficient moisture control, easy regenerative integration) over traditional vapor-compression refrigeration systems, thus increasingly attracting more research interest. Recently, several studies have been conducted that primarily aim...

Heat transfer characteristics in terms of heat transfer coefficient, overall heat transfer coefficient and heat exchanger effectiveness of a vertical counter flow Gasket plate heat exchanger (GPHE) are experimentally investigated. The tested PHE is made of stainless-steel plates with 30° chevron angle (β=30°). The surface enlargement factor, Ф for...

In the present study, an experimental investigation for heat transfer performance of γAl2O3-water nanofluid through a gasketed plate heat exchanger (GPHE) subjected to a low amplitude mechanical vibration was studied. γAl2O3-water nanofluid with four different volume fractions have been prepared and used as the hot working fluid. Corrugated plate h...

Heat transfer characteristics in terms of heat transfer coefficient, overall heat transfer coefficient and heat exchangereffectiveness of a vertical counter flow Gasket plate heat exchanger (GPHE) are experimentally investigated. The testedPHE is made of stainless-steel plates with 30° chevron angle (β=30°). The surface enlargement factor, Ф for al...

Investigation of a novel parameter that considerably enhances the performance of disk oil skimmers is introduced. This is of a great significance for the contingency plans of removing oil spills from aquatic environments and deciding their scenarios. Efficiency of a conventional disk oil skimmer could be nearly doubled by careful optimization of th...

In the present study, the interaction between a large number of adhering surfaces and spilled oil was experimentally studied throughout an extensive research program aiming toward enhancing the performance of the oleophilic disk skimmers commonly applied for recovery of oil spills from aquatic environment. Therefore, nine kinds of materials with di...