mdh.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Chen, Chang
Publications (2 of 2) Show all publications
Chen, C., Li, H., Li, X., Wang, Y. & Zhu, K. (2018). Feasibility of using thermal inertia to shift the peak energy demand of buildings. In: International Heat Transfer Conference: . Paper presented at 16th International Heat Transfer Conference, IHTC 2018, 10 August 2018 through 15 August 2018 (pp. 4419-4424). Begell House Inc.
Open this publication in new window or tab >>Feasibility of using thermal inertia to shift the peak energy demand of buildings
Show others...
2018 (English)In: International Heat Transfer Conference, Begell House Inc. , 2018, p. 4419-4424Conference paper, Published paper (Refereed)
Abstract [en]

Peak load introduces stress to the grid as supplied electricity is inadequate during peak demand period. In order to relieve the stress of grid and ensure the electricity supply, peak load shifting is an effective option. Buildings are consuming a huge amount of energy for space heating, ventilation and cooling. Using building thermal inertia to shift peak load has attracted more and more attention. By using thermal inertia, heat supplied during off-peak periods can be stored in the construction materials, and used in peak demand hours. However, peak shaving shall not sacrifice the indoor thermal comfort. The objective of this work is to investigate the impact of demand shifting by using thermal inertia on the indoor temperature. In order to understand how the demand shifting impacts the thermal comfort. A CFD model is developed to simulate an office room in winter time. Three cases that represent different shifting strategies are studied. According the results, when increasing the heating temperature, using thermal inertia of buildings can shift peak load, guarantee indoor thermal comfort and save energy. © 2018 International Heat Transfer Conference. All rights reserved.

Place, publisher, year, edition, pages
Begell House Inc., 2018
Keywords
Energy conversion and storage, Numerical simulation and super-computing, Peak load shifting, Thermal comfort, Thermal inertia, Thermal storage
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-44885 (URN)2-s2.0-85068328480 (Scopus ID)
Conference
16th International Heat Transfer Conference, IHTC 2018, 10 August 2018 through 15 August 2018
Note

Conference code: 148757; Export Date: 11 July 2019; Conference Paper; Correspondence Address: Li, H.; Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of TianjinChina; email: hailongli@mdh.se

Available from: 2019-07-11 Created: 2019-07-11 Last updated: 2019-07-11Bibliographically approved
Li, W., Khalid, H., Zhu, Z., Zhang, R., Liu, G., Chen, C. & Thorin, E. (2018). Methane production through anaerobic digestion: Participation and digestion characteristics of cellulose, hemicellulose and lignin. Applied Energy, 226, 1219-1228
Open this publication in new window or tab >>Methane production through anaerobic digestion: Participation and digestion characteristics of cellulose, hemicellulose and lignin
Show others...
2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 226, p. 1219-1228Article in journal (Refereed) Published
Abstract [en]

Lignocellulosic biomass is the most abundant natural resource with high biomethane potential. However, complex structure of lignocellulosic biomass has hampered the efficient utilization of this bioresource. Previous studies have investigated the overall anaerobic digestion performance of lignocellulosic biomass, but the individual participation of each lignocellulosic component during anaerobic digestion remained unclear. Thus, this study investigated the methane production characteristics of cellulose, hemicellulose, lignin and their mixtures along with the microbial communities involved in anaerobic digestion. The results showed that the biomethane potential of cellulose was higher than that of hemicellulose; however, hemicellulose was hydrolysed more quickly than cellulose, while lignin was very difficult to be digested. The higher concentrations of acetic, n-butyric and n-valeric acids hydrolysed from the hemicellulose resulted in a lower pH and more severe inhibition on methane production than that of cellulose, and the methanogenesis gradually recovered after pH adjustment. The co-digestion of cellulose and hemicellulose increased the methane yield and biodegradability compared to mono-digestions. The addition of lignin to cellulose brought more significant decrease in the methane yield of cellulose than that of hemicellulose. Substrate-related bacteria such as Clostridium sensu stricto, Lutaonella, Cloacibacillus and Christensenella showed higher relative abundance in cellulose digestate, and sugar-fermenting bacteria such as Saccharofermentans, Petrimonas and Levilinea were more rich in the digestate of hemicellulose. Moreover, methanogenic Methanospirillum and Methanothrix likely contributed to the methane production of cellulose, while aciduric methanogens from Methanobrevibacter, Methanomassiliicoccus, Methanobacterium and Methanoculleus contributed to that of hemicellulose. This study provides a deeper understanding of the mechanism in the bioconversion of lignocellulosic biomass during anaerobic digestion.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Anaerobic digestion characteristics, Cellulose, Hemicellulose, Lignin, Methane yield, Microbial community analysis
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-40260 (URN)10.1016/j.apenergy.2018.05.055 (DOI)000441688100095 ()2-s2.0-85049578340 (Scopus ID)
Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-10-18Bibliographically approved
Organisations

Search in DiVA

Show all publications