4.5 Review

Recent developments on photovoltaic thermal drying systems: a clean energy production

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Article Thermodynamics

Experimental and numerical analysis of a grooved hybrid photovoltaic-thermal solar drying system

Azim Dogus Tuncer et al.

Summary: A sustainable solar drying system with a modified PVT-air collector was designed and tested in this study. Numerical analysis showed improved outlet temperature for the modified collector, and experimental results demonstrated high thermal efficiency, overall exergy efficiency, and sustainability index.

APPLIED THERMAL ENGINEERING (2023)

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An environmental and economic evaluation of solar photovoltaic thermal dryer

A. Gupta et al.

Summary: The study presents a PVT-based solar dryer with high efficiency and a new mathematical drying model for predicting tomato drying characteristics. Environmental and economic parameters of the system were evaluated for different system life spans.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2022)

Article Energy & Fuels

Improving the performance of an active greenhouse dryer by integrating a solar absorber north wall coated with graphene nanoplatelet-embedded black paint

Fatih Selimefendigil et al.

Summary: By modifying the greenhouse drying system with solar absorber and thermally insulated north wall, as well as coating the designed north wall with graphene nanoplatelet-embedded black paint, drying time can be significantly reduced and efficiency improved.

SOLAR ENERGY (2022)

Article Energy & Fuels

Development and testing of novel photovoltaic-thermal collector-based solar dryer for green tea drying application

Ankur Gupta et al.

Summary: A sustainable solar based PVT tea drying system has been developed to reduce dependence on nonrenewable commercial tea drying systems. The performance of the system under different operating conditions, dried tea modes, and weather conditions has been investigated. A new drying model is proposed to predict the drying kinetics of green tea leaves more accurately.

SOLAR ENERGY (2022)

Article Green & Sustainable Science & Technology

Toward natural convection solar drying of date palm fruits (Phoenix dactylifera L.): An experimental study

Sunil Kumar Sansaniwal et al.

Summary: The drying characteristics and energy efficiency of date palm fruits using a natural convection greenhouse dryer and a natural convection indirect solar dryer were investigated. The greenhouse dryer exhibited higher convective heat transfer coefficient resulting in reduced drying time, while the indirect solar dryer achieved higher energy efficiency.

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY (2022)

Article Food Science & Technology

Experimental investigations on latent heat storage based modified mixed-mode greenhouse groundnuts drying

Shimpy et al.

Summary: This work examines the impact of latent heat storage on a passive-type mixed-mode greenhouse dryer for groundnut drying. The study compares the performance of different drying methods and analyzes energy and exergy efficiencies. Statistical analysis confirms the suitability of the page model for predicting drying behavior. The modified mixed-mode greenhouse dryer shows shorter energy payback time and higher CO2 mitigation, making it suitable for small farms and rural areas.

JOURNAL OF FOOD PROCESSING AND PRESERVATION (2022)

Article Thermodynamics

Enhancing the performance of a greenhouse drying system by using triple-flow solar air collector with nano-enhanced absorber coating

Fatih Selimefendigil et al.

Summary: This research demonstrates the significant improvement in thermal efficiency and drying performance, as well as the reduction in energy consumption, by utilizing nano-embedded absorber coating in the auxiliary heater of a greenhouse drying system.

CASE STUDIES IN THERMAL ENGINEERING (2022)

Article Green & Sustainable Science & Technology

Performance evaluation of an industrial solar dryer in Indian scenario: a techno-economic and environmental analysis

Ankit Srivastava et al.

Summary: The study aims to explore the feasibility of integrating indirect solar drying technology with industrial drying systems. Through simulation analysis, it is found that solar drying systems can save a significant amount of energy and are economically viable in specific temperature and airflow conditions in six cities in India. The findings provide guidance for investors in the food drying sector and emphasize the need for government incentives.

CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY (2022)

Article Thermodynamics

Exergy and environmental analysis of an active greenhouse dryer with Al2O3 nano-embedded latent heat thermal storage system: An experimental study

Fatih Selimefendigil et al.

Summary: This study investigates the effects of integrating nanoparticles into a paraffin-based thermal energy storage system on the thermal and drying behaviors of a greenhouse dryer. The results indicate that employing a nano-embedded latent heat storage unit improves the drying performance and energy efficiency of the greenhouse dryer. The findings provide specific performance metrics and emission data.

APPLIED THERMAL ENGINEERING (2022)

Article Entomology

Comparison of groundnut drying in simple and modified natural convection greenhouse dryers: Thermal, environmental and kinetic analyses

Shimpy et al.

Summary: This study compares the performances of simple and modified greenhouse dryers for groundnut drying. The results show that the modified greenhouse dryer has higher convective heat transfer coefficient, evaporative heat transfer coefficient, and moisture evaporation compared to the simple greenhouse dryer. The greenhouse energy and exergy efficiencies are also higher for the modified greenhouse dryer, while the specific energy consumption is lower. The energy payback time is shorter and the CO2 mitigation and total carbon credit earned are higher for the modified greenhouse dryer.

JOURNAL OF STORED PRODUCTS RESEARCH (2022)

Article Green & Sustainable Science & Technology

Environmental and economic sustainability of PVT drying system: A heat transfer approach

Sumit Tiwari et al.

Summary: This study explores the best PV technology suitable for PVT solar drying system through experimental validation and environmental and economic evaluation, finding that c-Si technology performs the best after five years.

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY (2021)

Article Engineering, Chemical

Performance assessments and techno and enviro-economic analyses on forced convection mixed mode solar dryer

Jasinta Poonam Ekka et al.

Summary: Solar drying is an energy-efficient and eco-friendly process commonly used in low-temperature drying. This study presents the year-round performance and techno enviro-economic assessments of a mixed-mode solar dryer, showing positive results in drying various agricultural products and providing economic viability. The developed dryer not only dries products efficiently under hygienic conditions but also has a quick payback period and high internal rate of return, making it a practical solution for farmers to reduce post-harvest losses and improve economic feasibility.

JOURNAL OF FOOD PROCESS ENGINEERING (2021)

Article Green & Sustainable Science & Technology

Energy and exergy analysis of a photovoltaic thermal (PVT) system used in solar dryer: A numerical and experimental investigation

Erdem Ciftci et al.

Summary: A vertical hybrid PVT solar dryer was developed and analyzed in this study, with the use of fins to enhance heat transfer. Experimental results showed that the application of fins significantly improved drying performance.

RENEWABLE ENERGY (2021)

Article Energy & Fuels

Performance evaluation of hybrid photovoltaic thermal (PVT) solar dryer for drying of cassava

E. Veeramanipriya et al.

Summary: A prototype hybrid Photovoltaic Thermal (PV - T) solar dryer has been developed and tested in India for drying cassava slices. The dryer was found to significantly reduce the moisture content of cassava, improving the drying efficiency and quality of the final product.

SOLAR ENERGY (2021)

Article Energy & Fuels

Thermal performance improvement of an indirect solar dryer with tube-type absorber packed with aluminum wool

Adnan Sozen et al.

Summary: Recent years have seen a rise in the demand for energy and a push towards utilizing renewable and sustainable energy sources, with solar thermal systems playing a key role in generating clean electricity and thermal energy. This study developed a single pass heater with tube-type absorber, using numerical simulations to optimize the absorber plate's shape and placement. Addition of aluminum wool into the tubes improved thermal efficiency, leading to a 30% reduction in drying time and enhanced performance in the modified dryer compared to unmodified dryer.

SOLAR ENERGY (2021)

Article Engineering, Chemical

Performance analysis of stand-alone solar photovoltaic thermal dryer for drying of green chili in hot-humid weather conditions of North-East India

Ankur Gupta et al.

Summary: In this study, an innovative stand-alone photovoltaic thermal dryer was designed and tested for drying green chili in hot-humid weather conditions of North-East India. The hybrid PVT solar dryer showed improved performance compared to conventional solar dryers in terms of drying kinetics and efficiency. The results suggest that the PVT solar dryer can be a cost-effective solution for farmers in off-grid areas to dry agricultural products efficiently.

JOURNAL OF FOOD PROCESS ENGINEERING (2021)

Article Food Science & Technology

Performance evaluation and economic analysis of modified solar dryer with thermal energy storage for drying of blood fruit (Haematocarpus validus)

Rajesh Kondareddy et al.

Summary: The study designed a modified solar dryer with thermal energy storage, which increased the air temperature and drying time while maintaining the quality of dried products. Analysis showed that the energy and cost payback periods of MSD were better than traditional tray dryers.

JOURNAL OF FOOD PROCESSING AND PRESERVATION (2021)

Article Green & Sustainable Science & Technology

Environmental and economic analysis of novel hybrid active greenhouse solar dryer with evacuated tube solar collector

Pushpendra Singh et al.

Summary: The novel hybrid active greenhouse solar dryer features a heat exchanger and evacuated tube collectors, significantly reducing drying time for three different crops and mitigating substantial amount of CO2 emissions over its lifetime.

SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS (2021)

Article Green & Sustainable Science & Technology

Energy-exergy and sustainability analysis of a PV-driven quadruple- flow solar drying system

Ataollah Khanlari et al.

Summary: Solar energy is being widely explored as a clean energy source to meet a large portion of energy demand in the future. A square-spiral finned quadruple-flow solar collector has been designed and compared with a finless collector in this study, demonstrating higher efficiency.

RENEWABLE ENERGY (2021)

Article Green & Sustainable Science & Technology

Thermal performance and kinetic analysis of vermicelli drying inside a greenhouse for sustainable development

Mahesh Kumar et al.

Summary: This study evaluates the efficiency and energy consumption of vermicelli drying in a greenhouse under forced convection mode in Rohtak, India. The results show that greenhouse drying is a more cost-effective and energy-saving method compared to traditional drying methods.

SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS (2021)

Article Entomology

Garlic dehydration inside heat exchanger-evacuated tube assisted drying system: Thermal performance, drying kinetic and color index

Anand Kushwah et al.

Summary: An experimental investigation was conducted on an advanced evacuated tube-assisted solar drying system under different water flow rates, resulting in the highest drying rate and efficiency of solar collector and solar dryer at 30 L/h water flow rate. The drying process of garlic in the system maintained good quality, with color preservation better than traditional drying methods.

JOURNAL OF STORED PRODUCTS RESEARCH (2021)

Article Entomology

Enviro-economical feasibility of groundnut drying under greenhouse and indoor forced convection hot air dryers

Mahesh Kumar et al.

Summary: This study compared the drying cost of groundnut under different modes and found that greenhouse drying modes have lower cost. Critical parameters such as EPBT, CO2 mitigation, and carbon credit earn were evaluated to study the cost analysis of a greenhouse dryer. EPBT was found to be about 1.66, 1.72, and 4.67 years for different drying modes.

JOURNAL OF STORED PRODUCTS RESEARCH (2021)

Article Energy & Fuels

Experimental and numerical analysis of a compact indirect solar dehumidification system

Faraz Afshari et al.

Summary: The study focused on designing and testing compact type solar dryers, with the ones featuring baffles showing better performance. Specific moisture extraction rates and exergy efficiency were higher in dryers with baffles compared to those without baffles. Overall, the study demonstrated the successful development of a compact solar dryer using simple and lightweight materials.

SOLAR ENERGY (2021)

Article Green & Sustainable Science & Technology

Energy, exergy, economic and environmental (4E) analysis of greenhouse dryer in no-load condition

Laxman Mishra et al.

Summary: A lab-scale greenhouse dryer was developed and tested in the humid climate of hilly region in North East India, showing differences in performance under natural convection and mixed-mode forced convection through energy, exergy, economic, and environmental analyses. The system achieved higher energy and exergy efficiency under natural convection, earning carbon credits and having short energy payback periods. Suggestions for improving thermal performance and increasing utilization of solar based dryers in industry were also presented.

SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS (2021)

Article Green & Sustainable Science & Technology

Exergo-environmental analysis of an indirect forced convection solar dryer for drying bitter gourd slices

S. Vijayan et al.

RENEWABLE ENERGY (2020)

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Evaluation of specific energy consumption and GHG emissions for different drying methods (Case study: Pistacia Atlantica)

Mohammad Kaveh et al.

JOURNAL OF CLEANER PRODUCTION (2020)

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FORCED CONVECTION GREENHOUSE GROUNDNUT DRYING: AN EXPERIMENTAL STUDY

Ravinder Kumar Sahdev et al.

HEAT TRANSFER RESEARCH (2018)

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Energy analysis of hybrid solar tunnel dryer with PV system and solar collector for drying mint (MenthaViridis)

Mohamed A. Eltawil et al.

JOURNAL OF CLEANER PRODUCTION (2018)

Article Environmental Studies

Performance and CO2 mitigation analysis of a solar greenhouse dryer for coconut drying

S. Ayyappan

ENERGY & ENVIRONMENT (2018)

Article Engineering, Chemical

EFFECT OF DRYING ON TEXTURE AND COLOR CHARACTERISTICS OF GINGER AND TURMERIC IN A SOLAR BIOMASS INTEGRATED DRYER

A. Borah et al.

JOURNAL OF FOOD PROCESS ENGINEERING (2017)

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Environ economic analysis of various types of photovoltaic technologies integrated with greenhouse solar drying system

Vineet Saini et al.

JOURNAL OF CLEANER PRODUCTION (2017)

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Life Cycle Cost of Solar Biomass Hybrid Dryer Systems for Cashew Drying of Nuts in India

Saravanan Dhanushkodi et al.

ENVIRONMENTAL AND CLIMATE TECHNOLOGIES (2015)

Article Engineering, Chemical

Handbook of Industrial Drying, Fourth EditionEdited by A. S. Mujumdar

Bhesh Bhandari

DRYING TECHNOLOGY (2014)

Article Food Science & Technology

Environomical Analysis and Mathematical Modelling for Tomato Flakes Drying in a Modified Greenhouse Dryer under Active Mode

Om Prakash et al.

INTERNATIONAL JOURNAL OF FOOD ENGINEERING (2014)

Article Energy & Fuels

Energy matrices analysis of hybrid PVT greenhouse dryer by considering various silicon and non-silicon PV modules

Sujata Nayak et al.

INTERNATIONAL JOURNAL OF SUSTAINABLE ENERGY (2014)

Article Engineering, Chemical

Saffron Drying with a Heat Pump-Assisted Hybrid Photovoltaic-Thermal Solar Dryer

Hamid Mortezapour et al.

DRYING TECHNOLOGY (2012)

Article Energy & Fuels

Solar drying

V. Belessiotis et al.

SOLAR ENERGY (2011)

Review Green & Sustainable Science & Technology

Review of solar dryers for agricultural and marine products

A. Fudholi et al.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2010)

Article Engineering, Chemical

Exergy Analysis of Drying Process: An Experimental Study in Solar Greenhouse

Leyla Ozgener et al.

DRYING TECHNOLOGY (2009)

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Solar-energy drying systems: A review

Atul Sharma et al.

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Article Construction & Building Technology

Energy and exergy analysis of photovoltaic/thermal integrated with a solar greenhouse

Sujata Nayak et al.

ENERGY AND BUILDINGS (2008)

Article Biotechnology & Applied Microbiology

Microwave-assisted drying of biomaterials

V. Orsat et al.

FOOD AND BIOPRODUCTS PROCESSING (2007)

Article Food Science & Technology

A comparative study between intermittent microwave and infrared drying of bioproducts

KJ Chua et al.

INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY (2005)

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Solar energy investments in a developing economy

OI Okoro et al.

RENEWABLE ENERGY (2004)

Article Energy & Fuels

Exergy of undiluted thermal radiation

R Petela

SOLAR ENERGY (2003)

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Solar drying of sweet pepper and garlic using the tunnel greenhouse drier

M Condorí et al.

RENEWABLE ENERGY (2001)