E3S Web of Conferences

Open Access

Preface 00001

Totyo Totev, Ilinca Nastase and August Hubert Wierling

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132700001

• PDF (1.571 MB)
• NASA ADS Abstract Service

Open Access

Comparative analysis between methane and hydrogen regarding ignition and combustion in diffusive mode 01001

Lucian Mihăescu, Dorin Stanciu, Gheorghe Lăzăroiu, Ionel Pîșă and Gabriel Negreanu

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701001

• PDF (998.4 KB)
• References
• NASA ADS Abstract Service

Open Access

Energy and economic analysis of an ORC combined to steam boiler 01002

Gabriel Mocanu, Ion V. Ion and Cristian Iosifescu

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701002

• PDF (931.5 KB)
• References
• NASA ADS Abstract Service

Open Access

Investigating the kinetics at low temperature heat pump drying and conventional drying of osmotic dehydrated blueberries 01003

Hristo Hristov, Svetoslav Aleksandrov, Todorka Petrova, Milena Ruskova, Velitchka Gotcheva and Nikolay Penov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701003

• PDF (1.092 MB)
• References
• NASA ADS Abstract Service

Open Access

Comparative technical and economic analysis of innovative methods for waste heat recovery from flue gases for boiler type BKZ 220-100 01004

Hristo Beloev, Iliya Iliev, Angel Terziev, Andrey Kibarin and Madina Aliyarova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701004

• PDF (2.338 MB)
• References
• NASA ADS Abstract Service

Open Access

Moisture transfer in outer walls with layers of different density 01005

Andrey Rymarov, Dmitriy Titkov and Aleksey Ananiev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701005

• PDF (1.604 MB)
• References
• NASA ADS Abstract Service

Open Access

An experimental study for drying Pisum sativum on an electric dryer and a heat pump dryer 01006

Thanh Nhan Phan, Van Hung Tran, Nikola Kaloyanov and Merima Zlateva

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701006

• PDF (2.446 MB)
• References
• NASA ADS Abstract Service

Open Access

Modelling and numerical simulation of fire in a coffee storage hall 01007

Kalin Krumov, Nina Penkova, Boian Mladenov and Yordan Stoyanov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701007

• PDF (3.050 MB)
• References
• NASA ADS Abstract Service

Open Access

Verification and validation of a CFD model of a fixed regenerator for heat recovery from air 01008

Angel Penev, Lyubomir Tsokov and Momchil Vassilev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701008

• PDF (2.238 MB)
• References
• NASA ADS Abstract Service

Open Access

Air-to-water heat pump assessment: Part 1 – Experimental setup 01009

Nadezhda Doseva, Daniela Chakyrova, Svetoslav Stoianov and Ilia Hadhidimov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701009

• PDF (2.298 MB)
• References
• NASA ADS Abstract Service

Open Access

Air-to-water heat pump assessment: Part 2 – Exergetic and exergoeconomic analyses 01010

Nadezhda Doseva and Daniela Chakyrova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701010

• PDF (2.455 MB)
• References
• NASA ADS Abstract Service

Open Access

Modelling and numerical simulation of the transport phenomena in water thermal energy storage tanks 01011

Nikola Kaloyanov, Rosen Tsecov and Nina Penkova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701011

• PDF (3.836 MB)
• References
• NASA ADS Abstract Service

Open Access

An approach for reducing the air conditioning costs in office buildings in Vietnam 01012

Van Hung Tran, Thanh Nhan Phan and Momchil Vassilev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701012

• PDF (2.587 MB)
• References
• NASA ADS Abstract Service

Open Access

Thermal-hydraulic analysis of a VVER-1000 core in MSLB conditions 01013

Svetlomir Mitkov, Ivan Spasov and Nikola Kolev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701013

• PDF (2.363 MB)
• References
• NASA ADS Abstract Service

Open Access

Thermodynamic and kinetic parameters of biomass from black pine (PINUS NIGRA ARN.) 01014

Stanislava Tasheva, Milen Dimov, Hafize Fidan, Stanko Stankov, Lazar Lazarov, Bozidar Bozadzhiev, Apostol Simitchiev and Albena Stoyanova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701014

• PDF (180.6 KB)
• References
• NASA ADS Abstract Service

Open Access

Investigating the kinetics at low temperature heat pump drying and conventional drying of osmotic dehydrated blueberries 01015

Hristov Hristo, Aleksandrov Svetoslav, Petrova Todorka, Ruskova Milena, Gotcheva Velitchka and Nikolay Penov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132701015

• PDF (1.816 MB)
• References
• NASA ADS Abstract Service

Open Access

Optimization of the distance between the rows in solar collectors’ arrays 02001

Merima Zlateva

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702001

• PDF (229.4 KB)
• References
• NASA ADS Abstract Service

Open Access

Simulation Investigation of the Wind Load of Photovoltaic Panels 02002

Ivaylo Stoyanov, Teodor Iliev and Grigor Mihaylov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702002

• PDF (2.643 MB)
• References
• NASA ADS Abstract Service

Open Access

Assessing the diversification of energy mix with the methods of entropy and hierarchy of information 02003

Iliyan Petrov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702003

• PDF (868.7 KB)
• References
• NASA ADS Abstract Service

Open Access

Renewable energies projects selection: block criteria systematization with AHP and Entropy-MOORA methods in MCDM 02004

Iliyan Petrov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702004

• PDF (168.5 KB)
• References
• NASA ADS Abstract Service

Open Access

Influence evaluation of the ship propulsion system on the energy efficiency for small, medium and large container vessels 02005

Viktor Nikiforov and Irina Kostova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702005

• PDF (1.562 MB)
• References
• NASA ADS Abstract Service

Open Access

Impact study of the fuel type used on the energy efficiency costs values and harmful emissions generation for small, medium and large container vessels 02006

Viktor Nikiforov and Irina Kostova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702006

• PDF (933.5 KB)
• References
• NASA ADS Abstract Service

Open Access

A design of solar battery cleaning system by modularity method 02007

L.K. Dien and Svetlin Antonov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702007

• PDF (1.742 MB)
• References
• NASA ADS Abstract Service

Open Access

Electronic measuring system design for photovoltaic panels analysis 02008

Krastin Yordanov, Iliya Hadzhidimov and Penka Zlateva

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702008

• PDF (4.532 MB)
• References
• NASA ADS Abstract Service

Open Access

Determination of the optimal air-fuel ratio for upgraded biogas engine operation 02009

Radostin Dimitrov and Penka Zlateva

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702009

• PDF (1.881 MB)
• References
• NASA ADS Abstract Service

Open Access

Possibilities for obtaining pellets by single-screw extrusion of biomass from black pine (Pinus nigra Arn.) 02010

Apostol Simitchiev, Bozidar Bozadzhiev, Lazar Lazarov, Stanko Stankov, Hafize Fidan and Albena Stoyanova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702010

• PDF (2.069 MB)
• References
• NASA ADS Abstract Service

Open Access

On the Development of a Real Time Water Monitoring System 02011

Sandel Zaharia, Gabriel Iana, Cristian Monea and Mihnea Sandu

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132702011

• PDF (1.657 MB)
• References
• NASA ADS Abstract Service

Open Access

Design and constructive – technological development for children’s art clothing 03001

Radka Atanasova, Magdalena Pavlova and Monika Merkova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703001

• PDF (4.287 MB)
• References
• NASA ADS Abstract Service

Open Access

Development of boutique denim clothing by the "upcycling" method 03002

Magdalena Pavlova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703002

• PDF (4.165 MB)
• References
• NASA ADS Abstract Service

Open Access

Methods for personal cooling in hot environment used in clothing and wearables 03003

Atanas Vasilev, Radostina A. Angelova and Rositsa Velichkova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703003

• PDF (2.067 MB)
• References
• NASA ADS Abstract Service

Open Access

Modification of Leather Surface Using Low-Pressure Plasma and Antimicrobial Reagent 03004

Sanja Ercegović Ražić, Jadranka Akalović, Tomislav Ivanković, Anja Ludaš and Katarina Ištef

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703004

• PDF (4.560 MB)
• References
• NASA ADS Abstract Service

Open Access

Tangram based technology for clothing design 03005

Boryana Georgieva-Gushtanova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703005

• PDF (2.454 MB)
• References
• NASA ADS Abstract Service

Open Access

Application of ICT in the Online Education of Apparel Design and Production within the framework of ICT-TEX project 03006

Hassan Saeed, Yordan Kyosev, Radka Atanasova, Angel Terziev and Carla Hertleer

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132703006

• PDF (1.772 MB)
• References
• NASA ADS Abstract Service

Open Access

GA-tuning of Multivariable PID Controller for Electrohydraulic Load-Sensing Servo System 04001

Alexander Mitov, Tsonyo Slavov, Jordan Kralev and Ilcho Angelov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132704001

• PDF (2.070 MB)
• References
• NASA ADS Abstract Service

Open Access

Design of direct acting differential pressure control valve test bench 04002

Ognyan Bekriev and Radoslav Asenov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132704002

• PDF (1.866 MB)
• References
• NASA ADS Abstract Service

Open Access

Reduction of the Battery Capacity of Hybrid Electric Vehicle with the Help of Electrically Assisted Turbocharger 04003

Milen Mihaylov, Ivaylo Stoyanov and Teodor Iliev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132704003

• PDF (2.156 MB)
• References
• NASA ADS Abstract Service

Open Access

Experimental study of the accuracy of measuring of a central water meter 04004

Ognyan Bekriev and Aleksandar Stanilov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132704004

• PDF (426.6 KB)
• References
• NASA ADS Abstract Service

Open Access

Investigations of a vertical axis wind turbine with frontal cylindrical guide vane unit 04005

Valentin Obretenov and Rossen Iliev

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132704005

• PDF (3.512 MB)
• References
• NASA ADS Abstract Service

Open Access

Modelling indoor pollutant distribution via passive scalar and virtual box approach 05001

George Pitchurov, Detelin Markov, Iskra Simova, Rositsa Velichkova, Peter Stankov and Radostina Angelova

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705001

• PDF (1.153 MB)
• References
• NASA ADS Abstract Service

Open Access

Parameters influencing the droplet formation in a focusing microfluidic channel 05002

Emil Grigorov, Jordan A. Denev, Boris Kirov and Vassil Galabov

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705002

• PDF (1.407 MB)
• References
• NASA ADS Abstract Service

Open Access

The influence of the structure of laminar flows on the characteristics of equipment 05003

Vasyl Arsirii, Oleg Kravchenko, Bohdan Savchuk and Olena Arsirii

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705003

• PDF (587.2 KB)
• References
• NASA ADS Abstract Service

Open Access

Modularity design of the bamboo plastic fiber forming machine 05004

Nguyen Thanh Nam and Nguyen Hoang Hiep

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705004

• PDF (3.237 MB)
• References
• NASA ADS Abstract Service

Open Access

A Research on The Formability of PVC Sheet in Single Point Incremental Forming (SPIF) Technology 05005

Nguyen Thanh Nam, Nguyen Hoang Hiep, Nguyen Tan Hung, Tran Trong Hy and Ho Huu Han

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705005

• PDF (2.378 MB)
• References
• NASA ADS Abstract Service

Open Access

Modularity design of instant coffee powder packaging machine 05006

Svetlin Antonov and L.K. Dien

Published online: 22 November 2021

DOI: https://doi.org/10.1051/e3sconf/202132705006

• PDF (2.098 MB)
• References
• NASA ADS Abstract Service