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Volume 207 (2020)

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E3S Web of Conferences

Volume 207 (2020)

25^th Scientific Conference on Power Engineering and Power Machines (PEPM’2020)

Sozopol, Bulgaria, September 19-21, 2020
I. Nastase, A.H. Wierling, T. Totev, A. Terziev, R. Atanasova, D. Krasteva, M. Zlateva, I. Dukov and K. Filipov (Eds.)

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About the conference

Published online: 18 November 2020

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Statement of Peer review

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Preface 00001

Totyo Totev, Ilinca Nastase and August Hubert Wierling

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020700001

Thermal Equipment, Heat and Mass Transfer Processes

Open Access

Application of polymer thermal store material in fixed honeycomb regenerative heat exchanger 01001

Angel Penev and Lyubomir Tsokov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701001

Open Access

Analysis of energy efficiency of air handling unit with integrated air to air heat exchanger in heating mode 01002

Slav Valchev and Ivan Mihaylov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701002

Open Access

Moisture accumulation analyses over windowpane, based on onsite measurements in sleeping room 01003

Martin Ivanov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701003

Open Access

A study of the thermal properties of an alternative straw-containing building material 01004

Penka Zlateva, Krastin Yordanov and Rositsa Petkova-Slipets

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701004

Open Access

Modelling and numerical simulation of the heat transfer and natural ventilation in storage halls 01005

Nina Penkova, Kalin Krumov, Boian Mladenov and Yordan Stoyanov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701005

Open Access

Electronic equipment measuring device for heat quantity through a flat wall 01006

Krastin Yordanov, Iliya Hadzhidimov and Penka Zlateva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701006

Open Access

Methodology for determination of heat losses from infiltration and ventilation and heat gains from people in overall energy balance of the building 01007

Dana Brazhanova, Vyacheslav Stoyak, Madina Ibragimova and Angel Terziev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701007

Open Access

Analysis of the efficiency of an embedded floor heating for snow melting and freeze protection 01008

Nina Penkova, Merima Zlateva and Boian Mladenov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701008

Open Access

Heat transfer performance of R1234yf for convective boiling in horizontal micro-fin and smooth tubes 01009

Thanh Nhan Phan, Van Hung Tran, Nikola Kaloyanov and Momchil Vassilev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701009

Open Access

The Prediction of Drying Uniformity in Dryer Chamber System Using Computational Fluid Dynamics (CFD) 01010

Daniela Chakyrova, Anastas Yangyozov, Dimitar Rusev and Nadezhda Doseva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701010

Open Access

Investigation of the possibilities for energy economy in continuous dryers through reduction of the drying time 01011

Nina Penkova and Boian Mladenov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701011

Open Access

Efficiency evaluation of water production from the atmospheric air in Vietnam 01012

Van Hung Tran, Thanh Nhan Phan, Nikola Kaloyanov and Momchil Vassilev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701012

Open Access

Influence of the capillary pipe geometry on the energy efficiency of household refrigerator 01013

Hristo Hristov, Apostol Simitchiev and Donka Stoeva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701013

Open Access

Life cycle cost analysis of different residential heat pump systems 01014

Nadezhda Doseva and Daniela Chakyrova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701014

Open Access

Energy Performance of a Kalina Cycle based CHP plant driven by low-enthalpy geothermal sources 01015

Gabriel Mocanu, Ion V. Ion and Florin Popescu

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701015

Open Access

Reduction of energy demand during ultrafiltration of goat’s milk 01016

Mariya Dushkova and Siyka Kodinova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701016

Open Access

Optimization of energy demand during ultrafiltration of cow’s milk with different membranes 01017

Siyka Kodinova and Mariya Dushkova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701017

Open Access

Sorption isotherms of tobacco (Nicotiana tabacum L.) seeds 01018

Lazar Lazarov, Nesho Toshkov, Tanya Ivanova, Venelina Popova and Nikolay Menkov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701018

Open Access

Thermodynamics of moisture sorption in tobacco (Nicotiana tabacum L.) seeds 01019

Nesho Toshkov, Lazar Lazarov, Venelina Popova, Tanya Ivanova and Nikolay Menkov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701019

Open Access

Thermodynamic investigations of the copigmentation process between strawberry anthocyanins and rose petal polyphenols (Rosa damascena Mill.) at different temperatures 01020

Ivalina Petrova, Kiril Mihalev, Vasil Shikov and Vanya Gandova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701020

Open Access

Physicochemical and thermodynamic properties of solutions of clary sage (Salvia sclarea L.) essential oil in ethanol-water system 01021

Stanislava Tasheva, Vanya Gandova, Krasimira Dobreva, Vanya Prodanova-Stefanova, Krasimira Marinova, Ivayla Dincheva and Albena Stoyanova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701021

Open Access

Physicochemical, thermodynamic and thermal properties of linalyl acetate-ethanol-water system 01022

Vanya Gandova, Stanislava Tasheva, Krasimira Dobreva, Vanya Prodanova-Stefanova, Krasimira Marinova and Albena Stoyanova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701022

Open Access

Material Balance of Fuel Cycles for Plutonium Recycling in Pressurised Water Reactors 01023

Zlatina Mancheva and Ivaylo Naydenov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701023

Open Access

Long-Term Radiotoxicity Evaluation of PWR Spent Uranium and MOX Fuel and Highly Active Waste 01024

Petar Paunov and Ivaylo Naydenov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701024

Open Access

The concept of measurement of calorific value of gaseous fuels 01025

Jaroslaw Markowski, Pawel Imilkowski, Marcin Nowacki, Damian Olejniczak, Jacek Madry, Krzysztof Netter, Krzysztof Jesionek and Grzegorz Wieczorkiewicz

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701025

Open Access

Adaptation of activated sludge with anammox to low temperatures 01026

Igor Gulshin and Nikolay Makisha

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701026

Open Access

An option for integration of Carnot Battery into a small Nuclear Power Plant 01027

Ana Borissova and Dimityr Popov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020701027

Renewable Energy and Environmental Protection

Open Access

Energy from municipal solid wastes: Galati city case study 02001

Bogdan Gabriel Carp, Gabriel Mocanu, Ion V. Ion and Florin Popescu

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702001

Open Access

Solid bio-fuel production at Moscow wastewater treatment plant 02002

Nikolay Makisha and Igor Gulshin

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702002

Open Access

Possible solutions for the reduction of carbon emissions during operation of lignite power unit 02003

Totyo Totev and Borislav Ignatov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702003

Open Access

Model research of the energy efficiency of a cogeneration backpressure steam turbine installation 02004

Ivan Genovski and Kaloyan Hristov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702004

Open Access

Study of the thermodynamic efficiency of solid fuel preparation systems of a thermal power plant based on an exergy analysis of the operation of subsystems 02005

Saule Kamarova, Saule Abildinova and Angel Terziev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702005

Open Access

Model of a building heating system with renewable energy sources 02006

Nicolay Komitov, Nicolay Shopov and Violeta Rasheva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702006

Open Access

Assessment of the annual performance of solar collectors by means of the utilizability method 02007

Merima Zlateva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702007

Open Access

Renewable energy and green construction in the Arctic 02008

Violetta Gassiy and Vasiliy Stoikov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702008

Open Access

Renewable energy and green market development in Russia 02009

Violetta Gassiy and Vasiliy Stoikov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702009

Open Access

Validation study for Large-Eddy Simulation of Forest Flow 02010

George Pitchurov, Christof Gromke, Jordan A. Denev and Flavio Cesar Cunha Galeazzo

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702010

Open Access

A Study of a Darrieus Vertical Axis Wind Turbine with a guiding nozzle 02011

Valentin Obretenov and Rossen Tliev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702011

Open Access

A CFD analysis of the performance characteristics of different Darrieus turbine runners 02012

Rossen Iliev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702012

Open Access

Development of Wind Energy and the Installed Wind Power Plants in Turkey 02013

Cansev Genç, Abdulla Sakalli, Ivaylo Stoyanov, Teodor Iliev, Grigor Mihaylov and Ivan Beloev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702013

Open Access

Wind Energy Potential for Electricity Production in Hatay, Turkey 02014

Cansev Genç, Abdulla Sakalli, Ivaylo Stoyanov, Teodor Iliev, Grigor Mihaylov and Ivan Beloev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702014

Open Access

Assessment of the effect of climate change on the floods in Bulgaria 02015

Rositsa Velichkova, Radostina A. Angelova and Iskra Simova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702015

Open Access

Experimental investigation of acid mining water 02016

Martin Pushkarov and Rositsa Velichkova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020702016

Design and Technologies for Clothing and Textiles

Open Access

Application and technologies for textile sensors production used in pressure distribution measurement - a critical review 03001

Daniela Sofronova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703001

Open Access

Deformation behavior of textile electrodes during compression 03002

Diana Germanova-Krasteva and Elena Nikolova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703002

Open Access

Study of the influence of compressive force on the coefficients of friction for wool-containing fabrics 03003

Raya Stoyanova, Sasho Aleksandrov and Umme Kapanak

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703003

Open Access

Evaluation of stitch length accuracy of embroidery machine by different speed and step 03004

Daniela Sofronova and Yavor Sofronov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703004

Open Access

Women’s clothing with eco design features 03005

Radka Atanasova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703005

Open Access

Developing a creative method for reuse of clothing 03006

Magdalena Pavlova and Radka Atanasova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703006

Open Access

Analysis of defects and their impact on the production losses using Pareto diagrams 03007

Diana Germanova-Krasteva and Irena Dimcheva

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703007

Open Access

The circular economy: a new paradigm for the textile and clothing industries 03008

Radostina A. Angelova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020703008

Hydraulic and Pneumatic Fluid Power Systems and Machinery

Open Access

Comparison of Model Predictive Control (MPC) and Linear-Quadratic Gaussian (LQG) Algorithm for Electrohydraulic Steering Control System 04001

Alexander Mitov, Jordan Kralev, Tsonyo Slavov and Ilcho Angelov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020704001

Open Access

Design of Adaptive Fuzzy PID Controller for Electropneumatic System 04002

Krasimir Ormandzhiev and Stanimir Yordanov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020704002

Open Access

Parametric Optimization of Electrohydraulic Servo System 04003

Krasimir Ormandzhiev, Stanimir Yordanov, Georgi Mihalev and Krasen Kostov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020704003

Open Access

Determining the minor loss coefficient of cone diffusers 04004

Gencho Popov, Kliment Klimentov, Boris Kostov and Reneta Dimitrova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020704004

Open Access

CFD computation of flow in the flow path of a torque flow pump 04005

Dmitry Svoboda, Igor Borshchev, Aleksandr Zharkovskii, Evgeniy Tvanov and Arsentiy Klyuyev

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020704005

Miscellaneous

Open Access

Two-dimensional numerical tests, of drag compensation device for on-road freight vehicles, based on CFD methods 05001

Martin Ivanov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020705001

Open Access

Cavitation treatment of water from a wastewater treatment plant 05002

Donka Stoeva, Apostol Simitchiev and Hristo Hristov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020705002

Open Access

The Development of the Method and Determination of the Relative Abrasiveness of Bulk Substances 05003

Gulmira Akimbek, Birlesbek Aliyarov and Shyryn Akimbekova

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020705003

Open Access

A Study on the Effects of Technical Parameters on the Tensile Strength of Bamboo Plywood 05004

Svetlin Antonov, Nguyen Thanh Nam, Tran Trong Hy and Le Khanh Dien

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020705004

Open Access

Study on the formability by TPIF technology for aluminium sheet at room temperature 05005

Ma Van Viet, Nguyen Truong Thinh, Le Van Sy and Svetlin Antonov

Published online: 18 November 2020

DOI: https://doi.org/10.1051/e3sconf/202020705005