·          

Synopsis: A polymer composite consisting of hybrid filler epoxy composites is composed of graphene microparticles, nanoplatelets, and boron nitride, which are used as a thermal paste or a thermally conductive chemical compound. When this compound is placed between a heat source and a heat sink during the installation of electrical equipment or a CPU on a substrate as a heat sink, it improves heat transfer and ensures efficient cooling. This, in turn, leads to a higher power density of electronic devices and helps prevent overheating.

·          

Investigation of Muffler Performance on Environmental Pollution, Air Quality Control Company, under contract No. AQ765398, finished in 2017.

Synopsis: In this study, we enhance exhaust performance to decrease noise and emission by optimizing the muffler part through the conjugate gradient method. We conducted a measurement of both noise and emission to evaluate the muffler's performance. The measurements were done by comparing the muffler without and with a re-heater. The test result showed that utilizing a re-heater can reduce CO, CO2, and HC compared to the muffler without re-heater. These results indicate that the muffler with re-heater designed in this study is effective in reducing noise and emission from the roar and combustion of the engine, respectively.

·          

Effect of Carbon Nanotubes Doping on the Thermal Conductivity of Solid Materials, Iran National Science Foundation (INSF), under contract No. 89004000, finished in 2012.

Synopsis: This project aims to investigate the effect of combining carbon nanotubes with polymer on their thermal conductivity. The other objective is to explore the relationship between the nanocomposite's thermal conductivity and the carbon nanotube micro- and nano-structure. One of the main challenges of achieving high thermal conductivity is the significant interfacial thermal resistance between the carbon nanotube particles and the surrounding polymer matrix, which can impede the heat transfer. The thermal conductivity of polymer composites depends on various factors such as the thermal conductivity of the constituent components, tube size, and polymer morphology, among others. Thermally conductive polymer composites could potentially replace metal parts in heat-sink applications, with advantages such as being lightweight, corrosion-resistant, and easy to process.

·          

Simulation of Air Flow and Heat Transfer between Rotor and Stator of Generator, TY105-Ansaldo, Engineering Company and Manufacturing of MAPNA Generator, under contract No. 175420, finished in 2012.

Synopsis: In electric generators, if the internal temperature of the generator exceeds its critical value (Tc=150°C), the rotor becomes demagnetized, and the resistance of the copper windings in the stator increases as the temperature increases due to the ohmic loss. An increase in temperature also negatively affects the generator's efficiency. Therefore, it is essential heat transfer analysis of the rotor-stator system in the generator is accomplished for design purpose, especially to prevent overheating. Depending on overall heat removal and installation requirement, A compact cooling improvement structure, axial ventilation guide vane, is proposed to strengthen the heat dissipation capacity of the motor.

·          

Simulation of Accidents Consequences of Natural Gas Release in Pipelines, National Iranian Gas Company, Tehran, Iran, under contract No. 76398525, finished in 2007.

Synopsis: The objective is to analysis a transient flow of a compressible gas generated in a pipeline after an accidental rupture. The numerical simulation is performed by solving the conservation equations of an axisymmetric, transient, viscous, subsonic flow in a circular pipe including the breakpoint. The numerical technique is a combined
finite element finite volume method applied on the unstructured grid. A modified k-epsilon model with a two-layer equation for the near wall region and compressibility correction is used to predict the turbulent viscosity. The results show that, for example, after a time period of 0.16 seconds, the pressure at a distance of 61.5 m upstream of the breakpoint reduces about 8%, while this value for the downstream pressure located at the same distance from the rupture is about 14% at the same time. Also, the mass flow rate released from the rupture point will reach 2.4 times its initial value and become constant when the sonic condition occurs at this point after 0.16 seconds. Also, the average pressure of the rupture reduced to 60% of its initial value and remained constant at the same time and under the same condition.

·          

Experimental Investigation of Cooling Short Circuit Generator During Start Up, Electric Power Research Center, Tehran, Iran, Finished in 2006.

Synopsis: A short circuit in a generator occurs when a large amount of electric current flows, which causes overheating and can result in damage to mechanical, thermal, and stress equipment. This research aims to explore the various cooling systems that can be used to prevent generators from overheating, including air-cooled open and fully enclosed ventilation systems, as well as liquid-cooled systems. A short circuit is caused when electricity flows down an unintended or incorrect path with little to no resistance. This can occur due to abnormal system conditions, internal or external factors. Additionally, running a generator at excessively high RPM can cause overheating. A generator converts mechanical energy to electrical energy by moving electrical conductors in a magnetic field. On the other hand, the impedance, which is the combined reactance and resistance, controls the flow of current in an alternating current circuit.

·          

Design and analysis of a spectral window, funded by Iranian Fuel Conservation Organization, Tehran, Iran, under contract No. 1396573, finished in 2005.

Synopsis: The main objective of this project is to evaluate the effect of various parameters, such as transition temperature, solar and long-wave thermal radiation properties, on the performance of thermochromic windows to improve their energy efficiency. These windows use adhesive coatings such as Vanadium dioxide (VO2) to adjust tinting passively with window surface temperature. During summer, the undesirable radiation is absorbed by the thermochromic materials, which then converts absorbed radiation into heat that is transferred into the indoor environment through thermal radiation and convection. This significantly reduces energy consumption. Additionally, a window with low emissivity coating on the indoor side can prevent long-wave thermal radiation from entering the room in summer and also keep the thermal radiation from indoor surfaces from escaping the room in winter, leading to decreased energy consumption in both seasons. On the other hand, In perfect windows, the spectral transmittance of undesirable radiation is indeed zero due to the completely reflecting radiation, and the corresponding spectral absorptivity is also zero.

·          

·          

Reduction in Water Consumption of Air Washer / Internship project, Iran-Khodro Company, Tehran, Iran, Finished in 2005.

·          

Experimental Investigation of Vacuum Influence on the Solar Collector Performance, Electric Power Research Center, Tehran, Iran, under contract No. 98254371, finished in1998.