Author
Bidyut Baran Saha
Other affiliations: Indian Institute of Science, International Institute of Minnesota, University of Tokyo ...read more
Bio: Bidyut Baran Saha is an academic researcher from Kyushu University. The author has contributed to research in topics: Adsorption & Activated carbon. The author has an hindex of 58, co-authored 383 publications receiving 11263 citations. Previous affiliations of Bidyut Baran Saha include Indian Institute of Science & International Institute of Minnesota.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, an experimental approach for the determination of thermodynamic characteristics of silica gel-water working pair is described, which is essential for the sizing of adsorption chillers.
308 citations
TL;DR: In this paper, the authors presented a transient model for a two-bed, silica gel-water adsorption chiller and found that regardless of the initial mass distribution, the chiller was able to achieve the same cyclic-steady state within four cycles or 1800s.
Abstract: This article presents a transient model for a two-bed, silica gel-water adsorption chiller. Compared with our previous cyclic-steady-state model, we found very good agreement between our model prediction and experimental data. We found that, regardless of the initial mass distribution, the chiller was able to achieve the same cyclic-steady-state within four cycles or 1800 s. We also demonstrated that the manufacturer had empirically evolved to select a fixed switching and cycle time such that the best peak evaporator temperature suppression, and near maximum cooling capacity can be achieved by a compact design.
265 citations
TL;DR: In this paper, the authors trace the evolution of the technology and analyze the obstacles to wide spread use of adsorption chillers and highlight the potential of nano-technology in the development of adsorbent material.
260 citations
TL;DR: In this paper, the physical adsorption of silica gel, working principle and features of a two-stage chiller are described, and experimental temperature profiles of heat transfer fluid inlets and outlets are presented.
251 citations
TL;DR: In this article, a dual-mode silica gel-water adsorption chiller design is outlined along with the performance evaluation of the innovative chiller, which utilizes effectively low-temperature solar or waste heat sources of temperature between 40 and 95°C.
Abstract: Over the past few decades there have been considerable efforts to use adsorption (solid/vapor) for cooling and heat pump applications, but intensified efforts were initiated only since the imposition of international restrictions on the production and utilization of CFCs and HCFCs. In this paper, a dual-mode silica gel–water adsorption chiller design is outlined along with the performance evaluation of the innovative chiller. This adsorption chiller utilizes effectively low-temperature solar or waste heat sources of temperature between 40 and 95 °C. Two operation modes are possible for the advanced chiller. The first operation mode will be to work as a highly efficient conventional chiller where the driving source temperature is between 60 and 95 °C. The second operation mode will be to work as an advanced three-stage adsorption chiller where the available driving source temperature is very low (between 40 and 60 °C). With this very low driving source temperature in combination with a coolant at 30 °C, no other cycle except an advanced adsorption cycle with staged regeneration will be operational. The drawback of this operational mode is its poor efficiency in terms of cooling capacity and COP. Simulation results show that the optimum COP values are obtained at driving source temperatures between 50 and 55 °C in three-stage mode, and between 80 and 85 °C in single-stage, multi-bed mode.
226 citations
Cited by
More filters
2,687 citations
TL;DR: Criteria for choosing the optimum isotherm model is established through a critical review of different adsorption models and the use of various mathematically error functions such as linear regression analysis, nonlinear regressionAnalysis, and error functions for adsorption data optimization.
1,151 citations
TL;DR: In this paper, the authors present a cost analysis of the reverse osmosis process and the main parameters influencing the total water cost produced by different desalination technologies, including capital and operating costs, as well as local incentives or subsidies.
1,132 citations
TL;DR: The design and demonstration of a device based on a porous metal-organic framework that captures water from the atmosphere at ambient conditions by using low-grade heat from natural sunlight at a flux of less than 1 sun (1 kilowatt per square meter).
Abstract: Atmospheric water is a resource equivalent to ~10% of all fresh water in lakes on Earth. However, an efficient process for capturing and delivering water from air, especially at low humidity levels (down to 20%), has not been developed. We report the design and demonstration of a device based on a porous metal-organic framework {MOF-801, [Zr6O4(OH)4(fumarate)6]} that captures water from the atmosphere at ambient conditions by using low-grade heat from natural sunlight at a flux of less than 1 sun (1 kilowatt per square meter). This device is capable of harvesting 2.8 liters of water per kilogram of MOF daily at relative humidity levels as low as 20% and requires no additional input of energy.
1,041 citations
TL;DR: In this article, the authors review thermal comfort research work and discuss the implications for building energy efficiency, and propose to increase the summer set point temperature in order to save energy in buildings.
992 citations