Khosrow Ebrahimi

• PhD in Mechanical Engineering
• Professor (Assistant) at Texas State University

The Organic Rankine Cycle (ORC) is a promising technology for waste heat recovery in data centers due to its low-cost production of electricity, which can be used elsewhere in the data center. In this paper, an analysis is presented which assesses the effectiveness of ORC systems in repurposing data center waste heat energy from both thermodynamic...

Our theoretical studies showed that absorption refrigeration (AR) system and organic Rankine cycle (ORC) are the most promising technology candidates in utilizing the waste heat dissipated by data centers. Since both candidates work with heat of temperatures not less than 65°C, this study is limited to water-cooled and hybrid two-phase cooled data...

The depletion of the world0s limited reservoirs of fossil fuels, the worldwide impact of global warming and the high cost of energy are among the primary issues driving a renewed interest in the capture and reuse of waste energy. A major source of waste energy is being created by data centers through the increasing demand for cloud based connectivi...

In order to study the capability of computational methods in investigating the mecha- nisms associated with disease and contaminants transmission in aircraft cabins, the com- putational fluid dynamics (CFD) models are used for the simulation of turbulent airflow and tracer gas diffusion in a generic aircraft cabin mockup. The CFD models are vali- dat...

The first step in understanding different mechanisms associated with contagious disease transmission in airliner cabins is adequately resolving the airflow field. A Computational Fluid Dynamic (CFD) approach is used to study the behavior of turbulent airflow and calculate the velocity data in a full-scale, 11-row, Boeing 767 aircraft cabin mockup....

Computational study of dispersion of particles is one way to evaluate the spread of contaminants and viruses amongst occupants of an enclosure, such as an aircraft cabin. In this investigation, the turbulent dispersion of particles in a ventilated generic cabin is studied. The generic cabin resembles one-half of a Boeing 767-300 aircraft cabin. In...

Study of particle dispersion in ventilated indoor environments is a very useful and effective way to understand the mechanism for disease transmission in an enclosed environment. In this investigation, a computational approach is adopted in order to gain more knowledge about the transport of particulate materials in a simplified half cabin model of...

This study is a continuation of a previous research in numerical simulation of a turbulent airflow in a generic aircraft cabin model. Specifically, the primary objective of this project is to use Computational Fluid Dynamics (CFD) to simulate transport of a tracer gas injected into the generic aircraft cabin. The research work reported herein is co...