Author: "Sarkar, Jahar" - PubAg Search Results

Author:: Sarkar, Jahar, et al. ; Kumar, Vivek; Show all 2 Author
Source:: Powder technology 2019 v.345 pp. 717-727
ISSN:: 0032-5910
Subject:: Reynolds number; aluminum oxide; convection; friction; heat transfer coefficient; mixing; models; nanofluids; nanoparticles; powders; synergism; temperature
Abstract:: ... Heat transfer and pressure drop characteristics of minichannel heat sink are analysed experimentally and numerically (two-phase mixture model) by using hybrid nanofluids. Minichannel heat sink consists of 9 parallel rectangular shaped minichannels having depth of 3 mm and width of 1 mm. The Al2O3–TiO2 hybrid nanofluid with nanoparticles volume concentration of 0.1% with different nanoparticle mixt ...
DOI:: 10.1016/j.powtec.2019.01.061
: https://dx.doi.org/10.1016/j.powtec.2019.01.061

Author:: Sarkar, Jahar
Source:: Energy 2018 v.143 pp. 141-150
ISSN:: 0360-5442
Subject:: ammonia; heat recovery; mass flow; pentane
Abstract:: ... Novel methodology for pinch point design and optimization of subcritical and supercritical organic Rankine cycles is proposed for maximum heat recovery. The proposed method is able to predict pinch point locations in both evaporator and condenser simultaneously. As a main advantage, both evaporator and condenser pressures can be optimized simultaneously by optimizing only working fluid mass flow r ...
DOI:: 10.1016/j.energy.2017.10.057
: http://dx.doi.org/10.1016/j.energy.2017.10.057

Author:: Sarkar, Jahar, et al. ; Singh, Akhilesh; Sahoo, Rashmi Rekha; Show all 3 Authors
Source:: Food and bioproducts processing 2019 v.117 pp. 1-13
ISSN:: 0960-3085
Subject:: air; bananas; carrots; drying; exergy; flammability; food quality; heat pumps; model validation; specific energy; water activity; water content
Abstract:: ... The simulation of batch type open cycle heat pump dryer has been performed to study the system performances and food quality using promising low GWP refrigerants (R290, R600a, R32, R152a and R1234yf) as a substitute of R134a for carrot and banana drying. The experimentation with heat pump dryer test facility using R134a has been performed for model validation. Effects of drying time and material m ...
DOI:: 10.1016/j.fbp.2019.06.009
: https://dx.doi.org/10.1016/j.fbp.2019.06.009

Author:: Sarkar, Jahar
Source:: Energy 2015 v.81 pp. 344-351
ISSN:: 0360-5442
Subject:: carbon dioxide; heat exchangers; heat transfer; nitrous oxide; temperature
Abstract:: ... Analyses and operating pressure optimization of the supercritical Rankine cycles with and without regenerator and reheating for low-grade heat conversion have been conducted using N2O as a working fluid and compared with its counterpart CO2 based on various performance indicators. N2O is better in terms of net power output, thermal efficiency and exergetic efficiency and N2O works at much lower pr ...
DOI:: 10.1016/j.energy.2014.12.047
: http://dx.doi.org/10.1016/j.energy.2014.12.047

Author:: Sarkar, Jahar, et al. ; Bhattacharyya, Souvik; Show all 2 Author
Source:: Energy 2015 v.90 pp. 1618-1625
ISSN:: 0360-5442
Subject:: ambient temperature; ammonia; climate; electricity generation; feasibility studies; finance; heat; heat exchangers; pentane; power generation; renewable energy sources; wastes; India
Abstract:: ... India has great potential to employ the ORC (organic Rankine cycle) technology for conversion of low temperature waste heat and renewable energy. In this study, available waste heat and relevant renewable heat sources in India are reviewed and suitable working fluids for ORC have been selected based on operational, environmental and safety criteria. A feasibility study and comparison of selected f ...
DOI:: 10.1016/j.energy.2015.07.001
: http://dx.doi.org/10.1016/j.energy.2015.07.001

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