A newly developed algorithm for heat exchanger network design has been successfully tested in sev... more A newly developed algorithm for heat exchanger network design has been successfully tested in several case studies on its practical application potential. The combinatorial approach is based on an adapted time slice model and highlights the use of internal heat exchange, as well as exergetic considerations of heat exchangers. Results of a simple industrial case study are shown and outlook for future challenges are given.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Das Werk einschlieBlich aller seiner Teile ist urheberrechtlich geschOtzt. Jede Verwertung auBerh... more Das Werk einschlieBlich aller seiner Teile ist urheberrechtlich geschOtzt. Jede Verwertung auBerhaib der engen Grenzen des Urheberrechtsgesetzes ist ohne Zustimmung des Verlags unzullissig und strafbar. Das gilt insbesondere fiir Vervielfliltigungen. Dbersetzungen. Mikroverfilmungen und die Einspeicherung und Verarbeitung in elektronischen Systemen.
Bilanzrechnungen basieren auf den Grundsatzen der Erhaltung der Masse und der Energie und dienen ... more Bilanzrechnungen basieren auf den Grundsatzen der Erhaltung der Masse und der Energie und dienen zur Berechnung von Menge, Zusammensetzung, Druck und Temperatur aller in einem Prozes enthaltenen Strome. Da die Zustande der ein-und austretenden Strome essentiell fur den Entwurf der Apparate und Maschinen sind, ist es offensichtlich, das die Bilanzierung an erster Stelle erfolgen mus.
Background: Economic benefit has been analyzed for the yield of farming products when designing a... more Background: Economic benefit has been analyzed for the yield of farming products when designing a farming system, while waste treatment also generates profitable energy products for this system. The economic factor is decisive in decision-making for applying waste treatment solutions for a small-scale farming system. A household farming system in the Mekong Delta generates many kinds of organic wastes, but most of the agricultural waste resources are disposed of into the environment. Methods: This study approaches an analysis of economic-environmental-energy (EEE) efficiency for waste treatment of an integrated livestock-orchard (LO) system on a household scale in the Mekong Delta. This novel analysis method is based on the energy content of biomass and its cost. The EEE efficiency is optimized to gain objective functions regarding energy yield efficiency, system profit, and CO 2 sequestration for the treatment model. The algorithms are built for optimizing these objective functions. Results: The optimization results show the treatment model of pyrolysis and pelleting gain all the objective functions with high efficiency. The model is efficiently applied for the LO system that generates more than 100 kg of orchard residues and 3000 kg of pig manure. The system with a charcoal oven and pellet machine is capable to gain energy efficiency due to its potential biofuel products, such as biochars and pellet products. A treatment model of composting, pyrolysis, and pelleting gives the best performance of overall EEE efficiency. Conclusions: This work has proven economic benefits from integrating biogas tank, charcoal oven, and pellet machine in an integrated LO system. The system contributes not only for reducing CO 2 emissions but also for supplementing secondary renewable bioenergy, as well as for increasing incomes and thus supporting livelihoods for the local farming households.
A newly developed algorithm for heat exchanger network design has been successfully tested in sev... more A newly developed algorithm for heat exchanger network design has been successfully tested in several case studies on its practical application potential. The combinatorial approach is based on an adapted time slice model and highlights the use of internal heat exchange, as well as exergetic considerations of heat exchangers. Results of a simple industrial case study are shown and outlook for future challenges are given.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Das Werk einschlieBlich aller seiner Teile ist urheberrechtlich geschOtzt. Jede Verwertung auBerh... more Das Werk einschlieBlich aller seiner Teile ist urheberrechtlich geschOtzt. Jede Verwertung auBerhaib der engen Grenzen des Urheberrechtsgesetzes ist ohne Zustimmung des Verlags unzullissig und strafbar. Das gilt insbesondere fiir Vervielfliltigungen. Dbersetzungen. Mikroverfilmungen und die Einspeicherung und Verarbeitung in elektronischen Systemen.
Bilanzrechnungen basieren auf den Grundsatzen der Erhaltung der Masse und der Energie und dienen ... more Bilanzrechnungen basieren auf den Grundsatzen der Erhaltung der Masse und der Energie und dienen zur Berechnung von Menge, Zusammensetzung, Druck und Temperatur aller in einem Prozes enthaltenen Strome. Da die Zustande der ein-und austretenden Strome essentiell fur den Entwurf der Apparate und Maschinen sind, ist es offensichtlich, das die Bilanzierung an erster Stelle erfolgen mus.
Background: Economic benefit has been analyzed for the yield of farming products when designing a... more Background: Economic benefit has been analyzed for the yield of farming products when designing a farming system, while waste treatment also generates profitable energy products for this system. The economic factor is decisive in decision-making for applying waste treatment solutions for a small-scale farming system. A household farming system in the Mekong Delta generates many kinds of organic wastes, but most of the agricultural waste resources are disposed of into the environment. Methods: This study approaches an analysis of economic-environmental-energy (EEE) efficiency for waste treatment of an integrated livestock-orchard (LO) system on a household scale in the Mekong Delta. This novel analysis method is based on the energy content of biomass and its cost. The EEE efficiency is optimized to gain objective functions regarding energy yield efficiency, system profit, and CO 2 sequestration for the treatment model. The algorithms are built for optimizing these objective functions. Results: The optimization results show the treatment model of pyrolysis and pelleting gain all the objective functions with high efficiency. The model is efficiently applied for the LO system that generates more than 100 kg of orchard residues and 3000 kg of pig manure. The system with a charcoal oven and pellet machine is capable to gain energy efficiency due to its potential biofuel products, such as biochars and pellet products. A treatment model of composting, pyrolysis, and pelleting gives the best performance of overall EEE efficiency. Conclusions: This work has proven economic benefits from integrating biogas tank, charcoal oven, and pellet machine in an integrated LO system. The system contributes not only for reducing CO 2 emissions but also for supplementing secondary renewable bioenergy, as well as for increasing incomes and thus supporting livelihoods for the local farming households.
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