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Comparative study of Exergetic and Economic analysis of Multi-evaporator NH3 and NH3-CO2 CRS for a Seafood Processing Plant

Dasgupta, Mani Sankar (Bepress, 2021)

In a seafood processing plant, refrigeration is a vital and energy intensive process. In India, NH3 is predominately used to cater to such refrigeration demands. These industrial refrigeration systems have the multi-evaporator ...

CFD supported thermodynamic analysis of a CO2 pressure exchanger based refrigeration system for supermarkets

Dasgupta, Mani Sankar (Elsevier, 2023-04)

This manuscript presents a method to thermodynamically model a pressure exchanger device. CFD-based model of a rotary energy recovery device used in desalination process is developed and validated with published experimental ...

Natural Refrigerant Based Cascade System for Seafood Application

Dasgupta, Mani Sankar (Springer, 2023-04)

Refrigeration plays a vital role to ensure quality and safety of seafood. In a tropical country like India, the seafood industry has relatively larger cooling load throughout the supply chain due to higher temperature ...

Energy and exergy analysis of a novel dual-ejector booster transcritical CO2 refrigeration system for applications in warm climates

Dasgupta, Mani Sankar (Springer, 2022-09)

This paper presents a thermodynamic analysis of a novel dual-ejector transcritical CO2 refrigeration system for applications in warm climate. Dual-ejector flow-pressurization and flow-splitting for higher ambient temperature ...

E-waste Management -- A Study in Perspective of Pilani

Dasgupta, Mani Sankar (CURIE, 2010)

E-waste management is an emerging issue, driven by the rapidly increasing quantities of complex end-of-life electronic equipments. E-waste contains large amount of both toxic and valuable substances. The international ...

Designing a modular rope climbing bot

Dasgupta, Mani Sankar (IEEE, 2015)

This paper discusses design of an autonomous rope climbing robot for identified industrial applications. Modified design goals are drawn up after analyzing the same from prior publications. A modular design with wheel based ...

A Trans-critical CO2 Heat Pump System for Waste Heat Utilization in Warm Weather Condition Applied to a Milk Refrigeration Plant

Dasgupta, Mani Sankar (Bepress, 2016)

Based on field data from a medium scale ammonia based milk refrigeration plant located in northern part of India, a trans-critical CO2 based heat pump system is conceptualized to utilize the waste heat from the plant to ...

Evaluating Applicability of a Scroll Expander for CO2 Refrigeration System at Warm Climate

Dasgupta, Mani Sankar (World Scientific, 2017)

Performance of a trans-critical CO2 refrigeration cycle equipped with a scroll work recovery expander is investigated using a semi-empirical model of the scroll, for high ambient temperature application. Maximum isentropic ...

Comparative study of various supermarket refrigerating systems in European climate context

Dasgupta, Mani Sankar (IIR, 2018)

Due to the enormous carbon footprint of food retail stores the interest in natural working fluids, such as propane (R290) and CO2 (R744), has recently intensified in the commercial refrigeration sector. In this theoretical ...

Energetic, environmental and economic assessment of multi-evaporator CO2–NH3 cascade refrigeration system for seafood application

Dasgupta, Mani Sankar (Springer, 2022-09)

Refrigeration plays a vital role in ensuring quality and safety of seafood. In a tropical country like India, the seafood industry has a relatively larger cooling load throughout the supply chain due to higher temperature ...

Simulation and performance evaluation of air-cooled finned-tube gas cooler for trans-critical carbon dioxide refrigeration system in Indian context

Dasgupta, Mani Sankar (IIR, 2013-04)

This paper presents, the mathematical modeling, validation and simulation of air-cooled finned tube gas cooler for trans-critical carbon dioxide (CO2) refrigeration system in typical Indian conditions. Environmental ...

Thermodynamic analysis of trans-critical CO2 refrigeration cycle in Indian context

Dasgupta, Mani Sankar (IJSTA, 2015)

The coefficient of performance for CO2 based trans-critical system is lower at high ambient temperature regions like India due to higher energy required for compression to a high temperature beyond critical point. This ...

Smart control of electric lamp using artificial intelligence based controller

Dasgupta, Mani Sankar (IEEE, 2015)

There is need and scope of controlling the power consumed by conventional electric lamps in presence of some natural light. An artificial intelligence based control system has been developed to control a lamp dimmer circuit ...

Thermal and economic analysis of an on-board compensatory refrigeration system for small fishing boats

Dasgupta, Mani Sankar (Begell House, 2019)

In this work, the feasibility of a novel low capacity on-board compensatory refrigeration system is proposed for small motorized boats that are used by fisherman in western coast of India for fishing. The proposed refrigeration ...

ANN controller trained with steady state input-output data for a heat exchanger

Dasgupta, Mani Sankar (NISCAIR, 2021-05)

This paper discusses the design and implementation of an Artificial Neural Network (ANN) based adaptive controller for a heat exchanger. The control strategy chosen is that of explicit nonlinear model predictive control. ...

Performance evaluation of a CO2 scroll expander for work recovery using artificial neural network

Dasgupta, Mani Sankar (Taylor & Francis, 2017-10)

CO2 trans-critical refrigeration systems operate in sub-critical zone for major part of the up-time even for warm climate regions. Recovery of expansion work from CO2 refrigeration systems is viewed as a workable solution ...

Human detection based on explicit skin colour space thresholding and minor motion detection

Dasgupta, Mani Sankar (IEEE, 2014)

In this paper, a novel approach for human presence detection from digital image is presented. This approach is based on combined clue from skin colour and minor motion detection. For skin colour detection, explicit ...

A comparison of the equilibrium and the droplets based non-equilibrium compressible phase change solvers for condensation of carbon dioxide inside nozzles

Dasgupta, Mani Sankar; Yadav, Shyam Sundar (Global Digital Central, 2022)

In the current work, we simulate the condensation of supercritical CO2 during its high speed flow inside two different converging-diverging nozzles. We use the homogeneous equilibrium method and the classical nucleation ...

Parametric analysis and optimization of CO2 trans-critical cycle for chiller application in a warm climate

Dasgupta, Mani Sankar (Elsevier, 2019-03)

This article presents parametric analysis and subsequent optimization of a CO2 trans-critical chiller system operating in a warm climate. High side pressure and gas cooler face velocities are two controllable parameters ...

Performance evaluation of a multi-evaporator NH3-CO2 cascade refrigeration system with IHX for seafood processing industry

Dasgupta, Mani Sankar (IIR, 2020)

Seafood processing typically has cooling demands at four different temperatures within the range -40 °C to 0 °C. An NH3-CO2 cascade refrigeration system equipped with an internal heat exchanger (IHX) is proposed for the ...

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Department of Mechanical engineering: Recent submissions

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