Other affiliations: Dalhousie University
Bio: S. Syahrul is an academic researcher from University of Mataram. The author has contributed to research in topics: Medicine & Humanities. The author has an hindex of 6, co-authored 21 publications receiving 404 citations. Previous affiliations of S. Syahrul include Dalhousie University.
TL;DR: In this paper, energy and exergy analyses are conducted of the fluidized bed drying of moist materials for optimizing the operating conditions and the quality of the products, and the results show that exergy efficiencies are less than energy efficiencies due to irreversibilities which are not taken into consideration in energy analysis.
TL;DR: In this article, the effects of hydrodynamic and thermodynamic conditions such as the inlet air temperature, the fluidization velocity and the initial moisture content on the energy efficiency and the exergy efficiency were analyzed.
TL;DR: In this article, the effects of the inlet air temperature, the air velocity and the initial moisture content of the material (i.e., corn) on the process thermal efficiency were investigated.
TL;DR: In this paper, the inlet air temperature, the fluidization velocity, and the initial moisture contents of the material (e.g., wheat) are studied to determine their effects on the overall energy efficiency to optimize the fluidized bed drying process.
Abstract: Energy analysis of a fluidized-bed drying system is undertaken to optimize the fluidized-bed drying conditions for large wet particles (Group D) using energy models. Three critical factors; the inlet air temperature, the fluidization velocity, and the initial moisture contents of the material (e.g., wheat) are studied to determine their effects on the overall energy efficiency to optimize the fluidized bed drying process. In order to verify the model, different experimental data sets for wheat material taken from the literature are used. The results show that the energy efficiencies of the fluidized-bed dryer decrease with increasing drying time and become the lowest at the end of the drying process. It is observed that the inlet air temperature has an important effect on energy efficiency for the material where the diffusion coefficient depends on both the temperature and the moisture content of the particle. Furthermore, the energy efficiencies showed higher values for particles with high initial moisture content while the effect of gas velocity varied depending on the material properties. A good agreement is achieved between the model predictions and the available experimental results. Copyright © 2002 John Wiley & Sons, Ltd.
TL;DR: In this paper, an experimental performance investigation on thermoelectric cooler box with several positions of the thermistors was performed, where the positions of thermistors were at the top, on the bottom, and on the wall.
TL;DR: In this article, a comprehensive review of the exergetic analysis and performance evaluation of a wide range of renewable energy resources (RERs) for the first time to the best of the author's knowledge is presented.
Abstract: Energy resources and their utilization intimately relate to sustainable development. In attaining sustainable development, increasing the energy efficiencies of processes utilizing sustainable energy resources plays an important role. The utilization of renewable energy offers a wide range of exceptional benefits. There is also a link between exergy and sustainable development. A sustainable energy system may be regarded as a cost-efficient, reliable, and environmentally friendly energy system that effectively utilizes local resources and networks. Exergy analysis has been widely used in the design, simulation and performance evaluation of energy systems. The present study comprehensively reviews exergetic analysis and performance evaluation of a wide range of renewable energy resources (RERs) for the first time to the best of the author's knowledge. In this regard, general relations (i.e., energy, exergy, entropy and exergy balance equations along with exergy efficiency, exergetic improvement potential rate and some thermodynamic parameters, such as fuel depletion ratio, relative irreversibility, productivity lack and exergetic factor) used in the analysis are presented first. Next, exergetically analyzed and evaluated RERs include (a) solar energy systems; (a1) solar collector applications such as solar water heating systems, solar space heating and cooling, solar refrigeration, solar cookers, industrial process heat, solar desalination systems and solar thermal power plants), (a2) photovoltaics (PVs) and (a3) hybrid (PV/thermal) solar collectors, (b) wind energy systems, (c) geothermal energy systems, (c1) direct utilization (district heating, geothermal or ground-source heat pumps, greenhouses and drying) and (c2) indirect utilization (geothermal power plants), (d) biomass, (e) other renewable energy systems, and (f) country based RERs. Studies conducted on these RERs are then compared with the previously ones in tabulated forms, while the Grassmann (or exergy flow) diagrams, which are a very useful representation of exergy flows and losses, for some RERs are given. Finally, the conclusions are presented. It is expected that this comprehensive study will be very beneficial to everyone involved or interested in the exergetic design, simulation, analysis and performance assessment of RERs.
TL;DR: In this paper, the authors investigated the thin-layer drying characteristics in solar dryer with forced convection and under open sun with natural convection of mint leaves, and performed energy analysis and exergy analysis of solar drying process.
TL;DR: In this paper, a new model for thermodynamic analysis, in terms of exergy, of a drying process is presented, where exergy efficiencies are derived as functions of heat and mass transfer parameters, and an illustrative example is considered to verify the present model and to illustrate the applicability of the model to actual drying processes at different drying air temperatures.
TL;DR: In this paper, the authors present recent development in drying and dewatering technologies for low-rank coals, such as rotary-drying, fluidized-bed drying, hot oil immersion drying and hot oil-immersion drying.
TL;DR: In this article, the authors summarized the previous findings on energy and exergy analyses of different solar energy systems (solar drying, solar air conditioning and refrigeration, solar water heating, solar cooking and solar power generation through solar photovoltaic and concentrated solar power techniques used for various heat and power generation applications).
Abstract: The overuse of fossil fuels in real life applications has caused their rapid depletion and fast climate change due to global warming and thus access to eco-friendly energy resources has become essential to meet the growing demand of clean energy. With this view, solar energy has proven to be an effective alternative and clean source of energy for the sustainable development of the society worldwide. Solar energy is a cheap, abundant and everlasting source of renewable energy and thus it can be integrated with different systems deals with energy consumption to overcome the dependency of present society on conventional fuels. Such integration of solar energy has given an opportunity for several studies based on the energy and exergy approaches. The energy analysis is very crucial in the study of process effectiveness while the exergetic analysis is another important tool to investigate the realistic behaviour of process involving various energy losses and internal irreversibility. The main objective of this article is to bring out valuable recommendations for wide exploitation of solar energy systems for different applications, from a thermodynamics perspective. Therefore, the present article has summarized the previous findings on energy and exergy analyses of different solar energy systems (solar drying, solar air conditioning and refrigeration, solar water heating, solar cooking and solar power generation through solar photovoltaic and concentrated solar power techniques used for various heat and power generation applications).