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Performance analysis of an R744 supermarket refrigeration system integrated with an organic rankine cycle

Dasgupta, Mani Sankar (MDPI, 2023-11)

The energy and economic performance of a transcritical R744 booster supermarket refrigeration system with and without parallel compression and integrated with an organic Rankine cycle (ORC) was investigated. The results ...

Investigation of economizer with screw compressor to provide subcooling and enhance cop in various natural refrigerant-based cascade freezer

Dasgupta, Mani Sankar (Springer, 2024-09)

This study examines two configurations of a cascade refrigeration system using natural refrigerants-R744 in the low-temperature circuit (LTC) and one from this list of R717, R290, R1270, or R600a in the high-temperature ...

Investigation on temperature heterogeneity for angled placing of crates in a cold storage, during precooling

Dasgupta, Mani Sankar (Springer, 2025-05)

Precooling conditions in cold storage are essential for preserving horticultural produce and reducing food and moisture loss. Inside a cold storage, the chilling rate and temperature heterogeneity are determined by the ...

Modelling of an onboard R290 refrigerated sea water (RSW) system for ice production on small fishing vessels in India

Dasgupta, Mani Sankar (NTNU, 2024)

India is one of the world's leading fish exporting nations. The fishing sector is expected to grow and already has a large economic and social impact. It is currently dominated by small fishing boats, which use ice to cool ...

Performance analysis of an active on-board refrigeration system using propane for improved fish preservation in small fishing boats

Dasgupta, Mani Sankar (International Institute of Refrigeration, 2024)

With a seafood production of 16.25 million metric tonnes in fiscal year 2022-23, India secures third rank globally in seafood production. To ensure the nation's food security and improve export earnings, it is critical to ...

Performance analysis of an ejector based CO2 transcritical refrigeration system with integrated mechanical subcooling for dairy application

Dasgupta, Mani Sankar (AIP, 2024-01)

Refrigeration system plays a crucial role in the dairy sector to preserve quality and prevent spoilage of milk. This sector also have enormous heating requirement for various processes such as pasteurization and heating ...

Study on various hot-gas defrosting configurations for CO2-NH3 cascade deep freezer

Dasgupta, Mani Sankar (Springer, 2024)

Four hot-gas bypass defrosting configurations for CO2-NH3 cascade blast freezer for application in fish processing firm are numerically investigated. Due to the high moisture content of fish, defrosting is necessary after ...

Energy, environmental, and economic analysis of novel R744/R290 cascade refrigeration systems designed for warm ambient conditions utilizing ejector

Dasgupta, Mani Sankar (Elsevier, 2024-08)

There is a growing global awareness about the need to reduce total carbon equivalent emissions and other environmental problems caused due to synthetic refrigerants. The study utilizes cascade refrigeration systems (CRS) ...

Mitigating temperature heterogeneity in cold storage: a numerical investigation using a cassette fan coil unit for air flow distribution

Dasgupta, Mani Sankar (IOP, 2024)

Inadequate storage conditions for agricultural harvests can result in significant economic losses. Cold storage plays a crucial role in preserving horticultural produce, where proper airflow distribution is essential for ...

A comparison of classical nucleation theory and thermal phase change based condensation models

Yadav, Shyam Sunder; Dasgupta, Mani Sankar (IOP, 2024)

In this work, we perform numerical simulations of the condensation process of CO2 inside a converging-diverging nozzle. We use Ansys Fluent for the simulation work. The real gas properties of CO2 are generated in tabular ...

Study of thermoelectric subcooling on small-scale CO2 transcritical systems for performance improvement with and without ejector and heat recovery

Dasgupta, Mani Sankar (IOP, 2024)

In this study, performance of TEC and TEC-TEG modules for providing subcooling in multi evaporator CO2 booster systems with and without ejector operating at high ambient is explored. Effect on heat recovery potential is ...

Optimizing cold storage for uniform airflow and temperature distribution in apple preservation using CFD simulation

Dasgupta, Mani Sankar (Springer Nature, 2024-10)

Apples are preserved in cold storage within standard size crates to avoid injury during handling and are stacked in a specific manner to promote adequate air circulation. This research builds an air flow and heat transfer ...

Pressure drop analysis for u-tube evacuated tubular collector

Dasgupta, Mani Sankar (Taylor & Francis, 2023-12)

The objective of this study is to determine the effect of water temperature and volume flow rate on the pressure drop across a U type evacuated tubular collector. The findings are expected to be useful for pump selection ...

Waste heat utilization: energy and economic benefits from multi-ejector chiller sub-cooling R744 supermarket refrigeration systems

Dasgupta, Mani Sankar (Elsevier, 2024-12)

This study investigated the energy and economic benefits of a novel sub-cooling technique using a heat-driven multi-ejector chiller (HDEC) in R744 supermarket refrigeration systems. Two configurations were evaluated: a ...

New approach to improve COP and heat recovery in transcritical CO2 refrigeration system for milk processing application

Dasgupta, Mani Sankar (Springer Nature, 2025-02)

In hot climates, subcooling or after-cooling is an effective method to enhance the coefficient of performance (COP) of CO2 transcritical refrigeration system. This study investigates improvement of two contemporary subcooling ...

Assessment of risk propagation in an e-waste collection system using Bayesian networks

Routroy, Srikanta; Dasgupta, Mani Sankar (Springer, 2025-03)

The widespread use of electrical and electronic devices has become integral to modern life, transforming communication and day-to-day work; however, this has led to a significant challenge in effectively managing the growing ...

Transcritical R744 supermarket refrigeration system integrated with a heat-driven ejector chiller

Dasgupta, Mani Sankar (MDPI, 2025-03)

The subcooling potential of a novel R717-based waste heat-driven multi-ejector chiller (HEC) integrated with an R744 refrigeration system was evaluated for use in supermarkets. The performance was compared with an R744 ...

Thermodynamic comparison of various refrigerants for an on-board R290 refrigeration system with economizer subcooling in small fishing boats

Dasgupta, Mani Sankar (Elsevier, 2025-04)

The Indian seafood sector faces a critical challenge in maintaining fish quality and reducing post-harvest losses, primarily due to inefficient cooling practices on small fishing vessels. This inefficiency not only reduces ...

Influence of pallet height on energy consumption and cooling effectiveness in an apple cold storage

Dasgupta, Mani Sankar (Springer Nature, 2025-04)

This study investigates the influence of pallet height on energy consumption and cooling effectiveness using a validated cold storage model based on CFD simulations. The model was validated against experimental temperature ...

Indoor plants’ effect on occupants’ performance, perceived comfort, and affect in an open-plan space in composite climatic regions, India

Dasgupta, Mani Sankar (Elsevier, 2025-04)

Biophilic designs with indoor plants are being increasingly recognized for their potential to enhance indoor environmental quality (IEQ) and occupant satisfaction. This can contribute to sustainable and green buildings. ...

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