Himangshu Bhowmik, Ruhul Amin
Solar collectors are the main components of a solar heating system. The collectors collect the sun’s energy, transform this radiation into heat, and then transfer this heat into a fluid, water or air, which has many household or industrial applications. This paper introduces a new technology to impr...
Himangshu Bhowmik, Kwan-Soo Lee
Himangshu Bhowmik, C.P. Tso, K.W. Tou, Feng Tan
Paul C. Okonkwo, Himangshu Bhowmik, Ibrahim B. Mansir, Mohammed Ahmed Awadh Al Sarj Al Marhoon et al.
The paper presents an experimental study of hydrogen production by alkaline water electrolysis using a homemade alkaline electrolyzer. The effect of electrode spacing on hydrogen production was investigated. The results demonstrated that electrode spacing plays a significant role in hydrogen product...
Paul C. Okonkwo, El Manaa Barhoumi, Ibrahim B. Mansir, Wilfred Emori et al.
Himangshu Bhowmik, C.P. Tso, K.W. Tou
Steady-state experiments are performed to study the convection heat transfer from four in-line simulated chips in a vertical rectangular channel using water as the working fluid. The experimental data cover a wide range for laminar flow under natural, mixed, and forced convection conditions with the...
Paul C. Okonkwo, Ikram Ben Belgacem, O.O. Ige, Wilfred Emori et al.
The field of proton exchange membrane fuel cells (PEMFCs) has been of primary interest in transportation applications as a result of their low pollutant emissions and relatively high efficiency. Bipolar plates are the vital components of these devices and are often exposed to corrosive environments ...
Himangshu Bhowmik, A. Gharibi, Ahmed Al Yaarubi, Nabil Al Alawi
Experiments are conducted to analyze the power-on transient natural convection heat transfer around a horizontal cylinder heated in air. The heat flux ranges from 177 W/m2 to 2426 W/m2 and Rayleigh number from 4.13 × 104 to 4.35 × 104. The effects of transient heat transfer data on different angular...
Himangshu Bhowmik, K.W. Tou
Himangshu Bhowmik, K.W. Tou
Experiments are performed to study the single-phase transient forced convection heat transfer on an array of 4×1 flush-mounted discrete heat sources in a vertical rectangular channel during the pump-on transient operation. Water is the coolant media and the flow covers the wide range of laminar flow...
Mohammad Azizur Rahman, Himangshu Bhowmik, Shuma Talukdar, C Kobus et al.
Three dimensional numerical models were developed to make prediction free convection heat transfer at steady state condition from radial flow heat sink. The air was considered as the medium of heat transfer. In radial flow heat sink, heat conducts through base in radial pattern and is uniformly tran...
Ruhul Amin, Himangshu Bhowmik, Mainuddin Mainuddin, Sahadat Hossain
The cutting speed and drilling depth of a drilling machine while drilling manually is very difficult to measure. In many cases, after completing the drilling work, it is also very difficult to measure the depth; especially for thin holes. However, this paper aimed to design and fabricate an automat...
Himangshu Bhowmik
Himangshu Bhowmik
An experimental study is performed to investigate the heat transfer characteristics of the unsteady natural convection over a horizontal cylinder heated in air. During the heater power-on transient operations, the effect of heat transfer on the circumference of the cylinder is observed. Surface heat...
Sanwarul Haque, Himangshu Ranjan Ghosh, N.C. Bhowmik
Now-a-days absorption chillers have become popular in commercial complexes for air conditioning in Bangladesh. Grid electricity or generator is commonly used for heating of the absorbent in the chiller. In this research work a feasibility study has been carried out on solar thermal energy based abso...