du.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 57) Show all publications
Huang, P., Lovati, M., Zhang, X. & Bales, C. (2020). A coordinated control to improve performance for a building cluster withenergy storage, electric vehicles, and energy sharing considered. Applied Energy, 268, Article ID 114983.
Open this publication in new window or tab >>A coordinated control to improve performance for a building cluster withenergy storage, electric vehicles, and energy sharing considered
2020 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 268, article id 114983Article in journal (Refereed) Published
National Category
Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-32599 (URN)10.1016/j.apenergy.2020.114983 (DOI)2-s2.0-85083394047 (Scopus ID)
Projects
Energy Matching
Available from: 2020-05-04 Created: 2020-05-04 Last updated: 2020-05-06Bibliographically approved
Jin, Y., Yan, D., Zhang, X., An, J. & Han, M. (2020). A data-driven model predictive control for lighting system based on historical occupancy in an office building: Methodology development. Building Simulation
Open this publication in new window or tab >>A data-driven model predictive control for lighting system based on historical occupancy in an office building: Methodology development
Show others...
2020 (English)In: Building Simulation, ISSN 1996-3599, E-ISSN 1996-8744Article in journal (Refereed) Epub ahead of print
National Category
Building Technologies Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-32888 (URN)10.1007/s12273-020-0638-x (DOI)
Available from: 2020-05-18 Created: 2020-05-18 Last updated: 2020-05-18Bibliographically approved
Huang, P., Copertaro, B., Zhang, X., Shen, J., Löfgren, I., Rönnelid, M., . . . Svanfeldt, M. (2020). A review of data centers as prosumers in district energy systems: Renewable energy integration and waste heat reuse for district heating. Applied Energy, 258, Article ID 114109.
Open this publication in new window or tab >>A review of data centers as prosumers in district energy systems: Renewable energy integration and waste heat reuse for district heating
Show others...
2020 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 258, article id 114109Article in journal (Refereed) Published
Abstract [en]

As large energy prosumers in district energy systems, on the one hand, data centers consume a large amount of electricity to ensure the Information Technologies (IT) facilities, ancillary power supply and cooling systems work properly; on the other hand, data centers produce a large quantity of waste heat due to the high heat dissipation rates of the IT facilities. To date, a systematic review of data centers from the perspective of energy prosumers, which considers both integration of the upstream green energy supply and downstream waste heat reuse, is still lacking. As a result, the potentials for improving data centers’ performances are limited due to a lack of global optimization of the upstream renewable energy integration and downstream waste heat utilization. This study is intended to fill in this gap and provides such a review. In this regard, the advancements in different cooling techniques, integration of renewable energy and advanced controls, waste heat utilization and connections for district heating, real projects, performance metrics and economic, energy and environmental analyses are reviewed. Based on the enormous amount of research on data centers in district energy systems, it has been found that: (1) global controls, which can manage the upstream renewable production, data centers’ operation and waste heat generation and downstream waste heat utilization are still lacking; (2) regional climate studies represent an effective way to find the optimal integration of renewable energy and waste heat recovery technologies for improving the data centers’ energy efficiency; (3) the development of global energy metrics will help to appropriately quantify the data center performances.

Keywords
Data center, District energy system, Renewable energy, Waste heat recovery, Energy efficiency
National Category
Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-31116 (URN)10.1016/j.apenergy.2019.114109 (DOI)000506575100010 ()2-s2.0-85075714407 (Scopus ID)
Available from: 2019-11-20 Created: 2019-11-20 Last updated: 2020-01-28Bibliographically approved
Wang, X., Xia, L., Bales, C., Zhang, X., Copertaro, B., Pan, S. & Wu, J. (2020). A systematic review of recent air source heat pump (ASHP) systems assisted by solar thermal, photovoltaic and photovoltaic/thermal sources. Renewable energy, 146, 2472-2487
Open this publication in new window or tab >>A systematic review of recent air source heat pump (ASHP) systems assisted by solar thermal, photovoltaic and photovoltaic/thermal sources
Show others...
2020 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 146, p. 2472-2487Article in journal (Refereed) Published
National Category
Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-30632 (URN)10.1016/j.renene.2019.08.096 (DOI)000499762300087 ()2-s2.0-85071196687 (Scopus ID)
Available from: 2019-08-23 Created: 2019-08-23 Last updated: 2020-01-02Bibliographically approved
Shen, J., Copertaro, B., Sangelantoni, L., Zhang, X., Suo, H. & Guan, X. (2020). An early-stage analysis of climate-adaptive designs for multi-family buildings under future climate scenario: Case studies in Rome, Italy and Stockholm, Sweden. Journal of Building Engineering, 27, Article ID 100972.
Open this publication in new window or tab >>An early-stage analysis of climate-adaptive designs for multi-family buildings under future climate scenario: Case studies in Rome, Italy and Stockholm, Sweden
Show others...
2020 (English)In: Journal of Building Engineering, E-ISSN 2352-7102, Vol. 27, article id 100972Article in journal (Refereed) Published
National Category
Civil Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-31015 (URN)10.1016/j.jobe.2019.100972 (DOI)000502361000006 ()2-s2.0-85073097183 (Scopus ID)
Available from: 2019-10-22 Created: 2019-10-22 Last updated: 2020-01-03Bibliographically approved
Li, Y., Rezgui, Y., Guerriero, A., Zhang, X., Han, M., Kubicki, S. & Yan, D. (2020). Development of an adaptation table to enhance the accuracy of the predicted mean vote model. Building and Environment, 168, Article ID 106504.
Open this publication in new window or tab >>Development of an adaptation table to enhance the accuracy of the predicted mean vote model
Show others...
2020 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 168, article id 106504Article in journal (Refereed) Published
National Category
Building Technologies
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-31070 (URN)10.1016/j.buildenv.2019.106504 (DOI)2-s2.0-85074601389 (Scopus ID)
Available from: 2019-11-01 Created: 2019-11-01 Last updated: 2019-11-26Bibliographically approved
Shen, J., Copertaro, B., Zhang, X., Koke, J., Kaufmann, P. & Krause, S. (2020). Exploring the potential of climate-adaptive container building design under future climate scenarios in three different climate zones. Sustainability, 12(1), Article ID 108.
Open this publication in new window or tab >>Exploring the potential of climate-adaptive container building design under future climate scenarios in three different climate zones
Show others...
2020 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 12, no 1, article id 108Article in journal (Refereed) Published
Abstract [en]

The deployment of containers as building modules has grown in popularity over the past years due to their inherent strength, modular construction and relatively low cost. The upcycled container architecture is being accepted since it is more eco-friendly than using the traditional building materials with intensive carbon footprint. Moreover, owing to the unquestionable urgency of climate change, existing climate-adaptive design strategies may no longer respond effectively as they are supposed to work in the previous passive design. Therefore, this paper explores an adaptive upcycled strategy of shipping containers as a carbon-smart modular living solution to a single family house under three design scenarios related to cold, temperate and hot-humid climatic zones, respectively. By assessing the projected future climate data with the ASHRAE Standard 55 and Current Handbook of Fundamentals Comfort Model, it was found that Rome would gradually face more failures in conventional climate adaptive design measures in the coming 60 years. The appropriate utilization of internal heat gains seems to be the most promising measure in Rome, followed by the measure of windows sun shading and passive solar direct gain by using low mass. Weather analysis shows different results in Berlin and Stockholm, where special attention should be paid to the occasional overheating risk. As a result, the holistic climate-adaptive container building design measures are finally summarized from aspects of design features, production / process and challenges in implementation.

Keywords
upcycling container house; future climate scenario; self-energy sufficient operated living module; empty containers repositioning
National Category
Architectural Engineering
Research subject
Energy and Built Environments, ENSECO - Produktion och process för utformning och konstruktion av energisjälvförsörjande containerbyggnader
Identifiers
urn:nbn:se:du-31305 (URN)10.3390/su12010108 (DOI)000521955600108 ()2-s2.0-85079666270 (Scopus ID)
Funder
European Regional Development Fund (ERDF), 46127660
Available from: 2019-12-18 Created: 2019-12-18 Last updated: 2020-05-05Bibliographically approved
Ren, G., Sunikka-Blank, M. & Zhang, X. (2020). Young urban households in Shanghai, China: characteristics of energy use and attitudes. Sustainable cities and society
Open this publication in new window or tab >>Young urban households in Shanghai, China: characteristics of energy use and attitudes
2020 (English)In: Sustainable cities and society, ISSN 2210-6707Article in journal (Refereed) Epub ahead of print
National Category
Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-32600 (URN)10.1016/j.scs.2020.102174 (DOI)
Available from: 2020-05-04 Created: 2020-05-04 Last updated: 2020-05-04Bibliographically approved
Huang, P., Fan, C., Zhang, X. & Wang, J. (2019). A hierarchical coordinated demand response control for buildings with improved performances at building group. Applied Energy, 242, 684-694
Open this publication in new window or tab >>A hierarchical coordinated demand response control for buildings with improved performances at building group
2019 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 242, p. 684-694Article in journal (Refereed) Published
Abstract [en]

Demand response control is one of the common means used for building peak demand limiting. Most of the existing demand response controls focused on single building’s performance optimization, and thus may cause new undesirable peak demands at building group, imposing stress on the grid power balance and limiting the economic savings. A few latest studies have demonstrated the potential benefits of demand response coordination, but the proposed methods cannot be applied in large scales. The main reason is that, for demand response coordination of multiple buildings, associated computational load and coordination complexity, increasing exponentially with building number, are challenges to be solved. This study, therefore, proposes a hierarchical demand response control to optimize operations of a large scale of buildings for group-level peak demand reduction. The hierarchical control first considers the building group as a ‘virtual’ building and searches the optimal performance that can be achieved at building group using genetic algorithm. To realize such optimal performance, it then coordinates each single building’s operation using non-linear programming. For validations, the proposed method has been applied on a case building group, and the study results show that the hierarchical control can overcome the challenges of excessive computational load and complexity. Moreover, in comparison with conventional independent control, it can achieve better performances in aspects of peak demand reduction and economic savings. This study provides a coordinated control for application in large scales, which can improve the effectiveness and efficiency in relieving the grid stress, and reduce the end-users’ electricity bills.

Keywords
Peak demand limiting, Demand response, Building group coordination, Economic cost, Grid interaction
National Category
Energy Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-29729 (URN)10.1016/j.apenergy.2019.03.148 (DOI)000470045800054 ()2-s2.0-85063025035 (Scopus ID)
Available from: 2019-03-20 Created: 2019-03-20 Last updated: 2020-01-02Bibliographically approved
Li, G., Tang, L., Zhang, X. & Dong, J. (2019). A review of factors affecting the efficiency of clean-in-place procedures in closed processing systems. Energy, 178, 57-71
Open this publication in new window or tab >>A review of factors affecting the efficiency of clean-in-place procedures in closed processing systems
2019 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 178, p. 57-71Article in journal (Refereed) Published
Abstract [en]

This paper reviews the current state of researches on improvement of Clean-In-Place (CIP) procedures in closed processing system thus saving energy, with a special attention paid to the hydrodynamic effects of cleaning fluid and the numerical and experimental approaches to investigate the identified controlling factors. The paper discussed the fouling problems of processing plants and the importance of sufficient CIP procedures, the forces contributing to cleaning with a special focus on the hydrodynamic effects. In general, it is possible to enhance hydrodynamic removal forces by local introduction of, among others, high wall shear stress and fluctuation rate of wall shear stress without consuming more energy. A theoretical model of particle removal in flow was also reviewed which supports the factors identified. The paper therefore further reviewed and compared the current state of modelling and experimental techniques on CIP improvement. To simulation the CIP process, it is necessary to consider 3D time-resolved Large Eddy Simulation with a Hybrid RANS-LES WMLES as Sub-Grid-Scale model because it captures both the mean and fluctuation rate of flow variables, while affordable for industrial flows. The wall shear stress measurement techniques and cleanablity test methods were also discussed and suggested.

Keywords
Clean-in-place, Efficiency, Hydraulic factors, Wall shear stress, CFD
National Category
Environmental Engineering
Research subject
Energy and Built Environments
Identifiers
urn:nbn:se:du-30009 (URN)10.1016/j.energy.2019.04.123 (DOI)000472686300005 ()2-s2.0-85065074591 (Scopus ID)
Available from: 2019-05-10 Created: 2019-05-10 Last updated: 2019-07-22Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2369-0169

Search in DiVA

Show all publications