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Special Issue "Selected Papers from BSE 2018: 9th International Conference on Biosystmes Engineering"

A special issue of Energies (ISSN 1996-1073).

Deadline for manuscript submissions: closed (31 August 2018)

Special Issue Editor

Guest Editor
Prof. Dr. Timo Kikas

Chair of Biosystems Engineering, Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia
Website | E-Mail
Interests: bioeconomy; biofuels; biomass conversion; biomethane; bioethanol; lingnocellulosic biomass; pretreatment; renewable transport fuels

Special Issue Information

Dear Colleagues,

Biosystems Engineering (BSE) aims to become the leading annual conference in the Baltic region for fields related to traditional and modern engineering techniques and technical solutions applied to biological systems. The goal of BSE 2018 is to gather scholars from all over the world to present advances in the field of biosystems engineering, and to foster an environment conducive to the exchange of ideas and information. This conference will also provide an ideal environment to develop new collaborations and meet experts on the fundamentals, applications, and products of the mentioned field.

Among the more prominent topics of the conference are energy and fuels from renewable sources, bioenergy, waste to energy, etc.

Prof. Dr. Timo Kikas
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Smart energy systems
  • Energy policy
  • Energy system analysis
  • Renewable energy resources
  • Advanced sustainable energy conversion systems
  • Renewable heat systems
  • Biofuels and biorefineries
  • Alternative fuels
  • Hybrid and electric vehicles
  • Energy storage
  • Energy efficient appliances
  • Energy efficiency in buildings

Published Papers (2 papers)

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Research

Open AccessArticle The Efficiency of Nitrogen and Flue Gas as Operating Gases in Explosive Decompression Pretreatment
Energies 2018, 11(8), 2074; https://doi.org/10.3390/en11082074
Received: 3 July 2018 / Revised: 3 August 2018 / Accepted: 7 August 2018 / Published: 9 August 2018
Cited by 1 | PDF Full-text (3007 KB) | HTML Full-text | XML Full-text
Abstract
As the pretreatment process is the most expensive and energy-consuming step in the overall second generation bioethanol production process, it is vital that it is studied and optimized in order to be able to develop the most efficient production process. The aim of [...] Read more.
As the pretreatment process is the most expensive and energy-consuming step in the overall second generation bioethanol production process, it is vital that it is studied and optimized in order to be able to develop the most efficient production process. The aim of this paper was to investigate chemical and physical changes in biomass during the process of applying the explosive decompression pretreatment method using two different gases—N2 and synthetic flue gas. The explosive decompression method is economically and environmentally attractive since no chemicals are used—rather it is pressure that is applied—and water is used to break down the biomass structure. Both pre-treatment methods were used at different temperatures. To be able to compare the effects of the pretreatment, samples from different process steps were gathered together and analysed. The results were used to assess the efficiency of the pretreatment, the chemical and physical changes in the biomass and, finally, the mass balances were compiled for the process during the different process steps of bioethanol production. The results showed that both pre-treatment methods are effective in hemicellulose dissolution, while the cellulose content decreases to a smaller degree. The high glucose and ethanol yields were gained with both explosive pretreatment methods at 175 °C (15.2–16.0 g glucose and 5.6–9.0 g ethanol per 100 g of dry biomass, respectively). Full article
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Open AccessArticle Increasing Solar Energy Usage for Dwelling Heating, Using Solar Collectors and Medium Sized Vacuum Insulated Storage Tank
Energies 2018, 11(7), 1832; https://doi.org/10.3390/en11071832
Received: 27 June 2018 / Revised: 9 July 2018 / Accepted: 10 July 2018 / Published: 12 July 2018
Cited by 2 | PDF Full-text (1497 KB) | HTML Full-text | XML Full-text
Abstract
This article describes a method for increasing the solar heat energy share in the heating of a dwelling. Solar irradiation is high in summer, in early autumn, and in spring, but during that same time, the heat demand of dwellings is low. This [...] Read more.
This article describes a method for increasing the solar heat energy share in the heating of a dwelling. Solar irradiation is high in summer, in early autumn, and in spring, but during that same time, the heat demand of dwellings is low. This article describes a solution for storing solar heat energy in summertime as well as the calculations of the heat energy balance of such a storage system. The solar heat energy is stored in a thermally insulated water tank and used in the heating period. The heat is also stored in the ground if necessary, using the ground loop of the heat pump if the water tank’s temperature rises above a certain threshold. The stored heat energy is used directly for heating if the heat carrier temperature inside the tank is sufficient. If the temperature is too low for direct heating, then the heat pump can be used to extract the stored energy. The calculations are based on the solar irradiation measurements and heating demand data of a sample dwelling. The seasonal storing of solar heat energy can increase the solar heat energy usage and decrease the heat pump working time. The long-term storage tank capacity of 15 m3 can increase the direct heating from solar by 41%. The direct heating system efficiency is 51%. Full article
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