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Bi-level modeling of district heating systems with prosumers

Penkovskii, Andrey; Stennikov, Valery; Kravets, Angelica - In: Energy Reports 6 (2020) 2, pp. 89-95

The paper deals with the actual problem of the functioning and development of district heating systems in the framework of the transition to intelligent energy, in which the active consumers (prosumers) holds the key place. The paper proposes an optimization mathematical model for management the...

Persistent link: https://www.econbiz.de/10012652224

Methods for optimization of time redundancy of prosumer in district heating systems

Postnikov, Ivan - In: Energy Reports 6 (2020) 2, pp. 214-220

The paper deals with the problem of operating the reliability of prosumers as part of a district heating system, taking into account overload time redundancy that they possess. This time redundancy can be both passive, caused by heat accumulating effect and use of thermal energy storages, as...

Persistent link: https://www.econbiz.de/10012652243

Modifications of probabilistic models of states evolution for reliability analysis of district heating systems

Postnikov, Ivan; Stennikov, Valery - In: Energy Reports 6 (2020) 2, pp. 293-298

The analysis and synthesis of reliability of energy systems, particularly district heating systems (DHS), is based on probabilistic modeling of different system states and events connecting these states (usually, these are failures and restoration of system components). The paper deals with the...

Persistent link: https://www.econbiz.de/10012652254

Exploiting of geothermal energy reserve and potential in Saudi Arabia: A case study at Ain Al Harrah

Al-Douri, Y.; Waheeb, S. A.; Johan, Mohd Rafie - In: Energy Reports 5 (2019), pp. 632-638

Saudi Arabia is enriched by geothermal resources and related to the tectonic activity of Red Sea, volcanic rocks and … ridges. The geothermal energy reserve, potential and their reserve for possible energy production are investigated. Nowadays … national oil consumption continues, local demand will be doubled within a decade. The study of geothermal energy is covered. A …

Persistent link: https://www.econbiz.de/10012651979

Intermediate pressure reboiling in geothermal flash plant for increased power production and more effective non-condensable gas abatement

Novotny, Vaclav; Vitvarova, Monika; Spale, Jan; … - In: Energy Reports 6 (2020) 3, pp. 20-27

Non-condensable gases (NCG) in condensing geothermal flash plants have negative effects as they reduce heat transfer …

Persistent link: https://www.econbiz.de/10012652337

Energy and exergy assessments of modified Organic Rankine Cycles (ORCs)

Safarian, Sahar; Aramoun, Fereshteh - In: Energy Reports 1 (2015), pp. 1-7

This paper presents a theoretical framework for the energy and exergy evaluation of a basic as well as three modified Organic Rankine Cycles (ORCs). The modified ORCs considered incorporating turbine bleeding, regeneration and both of them. The results demonstrate that evaporator has major...

Persistent link: https://www.econbiz.de/10011937639

Exergy and economic analyses of replacing feedwater heaters in a Rankine cycle with parabolic trough collectors

Mohammadi, Amin; Ahmadi, Mohammad Hossein; Bidi, Mokhtar; … - In: Energy Reports 4 (2018), pp. 243-251

Fossil fuels are exhaustible and their consumption causes environmental problems. As a result, renewable energy resources, specifically solar energy, should be utilized more to overcome the aforementioned issues. The biggest problem with renewable energy utilization is that their capital cost is...

Persistent link: https://www.econbiz.de/10011937747

Exergy analysis of a four pan jaggery making process

Khattak, Sanober; Greenough, Richard; Sardeshpande, Vishal - In: Energy Reports 4 (2018), pp. 470-477

Jaggery is a non-traditional sweetener that is produced from boiling sugarcane juice. Due to the energy intensive nature of the combustion process in jaggery making, previous studies in literature have presented various process and equipment modifications to affect its energy efficiency. This...

Persistent link: https://www.econbiz.de/10012651892

Exergy analysis of solar desalination systems based on passive multi-effect membrane distillation

Signorato, Francesco; Morciano, Matteo; Bergamasco, Luca; … - In: Energy Reports 6 (2020), pp. 445-454

Improving the efficiency and sustainability of water treatment technologies is crucial to reduce energy consumption and environmental pollution. Solar-driven devices have the potential to supply off-grid areas with freshwater through a sustainable approach. Passive desalination driven by solar...

Persistent link: https://www.econbiz.de/10012652409

Improved grass fibrous root algorithm for exergy optimization of a high-temperature PEMFC

Lu, Xiaohui; Ren, Jianglin; Guo, Lin; Wang, Peifang; … - In: Energy Reports 6 (2020), pp. 1328-1337

This paper presents an exergy assessment for a proposed power generation system that is used the organic Rankine cycle to recycle the waste heat from a high-temperature proton exchange membrane fuel cell (HT-PEMFC). To do so, mathematical model for the studied PEMFC along with the water...

Persistent link: https://www.econbiz.de/10012652486