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Full-Text Articles in Engineering
Identity-Based Remote Data Integrity Checking With Perfect Data Privacy Preserving For Cloud Storage, Yong Yu, Man Ho Au, Giuseppe Ateniese, Xinyi Huang, Willy Susilo, Yuanshun Dai, Geyong Min
Identity-Based Remote Data Integrity Checking With Perfect Data Privacy Preserving For Cloud Storage, Yong Yu, Man Ho Au, Giuseppe Ateniese, Xinyi Huang, Willy Susilo, Yuanshun Dai, Geyong Min
Faculty of Engineering and Information Sciences - Papers: Part A
Remote data integrity checking (RDIC) enables a data storage server, say a cloud server, to prove to a verifier that it is actually storing a data owner's data honestly. To date, a number of RDIC protocols have been proposed in the literature. However, most of the constructions suffer from the issue of requiring complex key management. That is, they rely on the expensive public key infrastructure (PKI), which might hinder the deployment of RDIC in practice. In this paper, we propose a new construction of identity-based (ID-based) RDIC protocol by making use of key-homomorphic cryptographic primitive to reduce the system …
Development Of Microencapsulated Phase Change Material For Solar Thermal Energy Storage, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis
Development Of Microencapsulated Phase Change Material For Solar Thermal Energy Storage, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper a novel microencapsulated phase change material (MF-3) has been developed and tested for solar assisted hot water storage systems. Even though the morphology of the sample was affected by the type of emulsifier used for fabrication it recorded the highest energy storage capacity of 126 kJ/kg with encapsulation efficiency of 97.4% as compared with other developed samples. For the purpose of assessing its thermal effectiveness it was theoretically evaluated in a compacted fixed bed TES unit and found to be capable of achieving a higher energy storage density as well as relatively smaller physical storage size than …
Dynamic Exergy Analysis For The Thermal Storage Optimization Of The Building Envelope, Valentina Bonetti, Georgios Kokogiannakis
Dynamic Exergy Analysis For The Thermal Storage Optimization Of The Building Envelope, Valentina Bonetti, Georgios Kokogiannakis
Faculty of Engineering and Information Sciences - Papers: Part A
As a measure of energy "quality", exergy is meaningful for comparing the potential for thermal storage. Systems containing the same amount of energy could have considerably different capabilities in matching a demand profile, and exergy measures this difference. Exergy stored in the envelope of buildings is central in sustainability because the environment could be an unlimited source of energy if its interaction with the envelope is optimised for maintaining the indoor conditions within comfort ranges. Since the occurring phenomena are highly fluctuating, a dynamic exergy analysis is required; however, dynamic exergy modelling is complex and has not hitherto been implemented …
Simulation Of The Melting Process Of Ice Slurry For Energy Storage Using A Two-Fluid Lattice Boltzmann Method, Qi Lin, Shugang Wang, Zhenjun Ma, Jihong Wang, Tengfei Zhang
Simulation Of The Melting Process Of Ice Slurry For Energy Storage Using A Two-Fluid Lattice Boltzmann Method, Qi Lin, Shugang Wang, Zhenjun Ma, Jihong Wang, Tengfei Zhang
Faculty of Engineering and Information Sciences - Papers: Part B
Ice slurry can be used as the thermal storage media in latent cool storage systems for both residential and commercial buildings. This paper presents the investigation of the phase change characteristics of the ice slurry using a two-fluid Lattice Boltzmann Method (TFLBM). The melting and migration processes of the ice slurry are simulated by improving the equilibrium distribution function and matching the relevant parameters such as the kinetic viscosity of ice particle cluster and cross-collision coefficient. The sensitivity analysis of the ice slurry viscosity and cross-collision coefficient are achieved through six numerical experiments, and the ice melting in the internal-melt …
Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper
Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper
Faculty of Engineering and Information Sciences - Papers: Part A
This paper describes the development, implementation and experimental investigation of a Hybrid Model Predictive Control (HMPC) strategy to control solar-assisted heating, ventilation and air-conditioning (HVAC) systems with on-site thermal energy generation and storage. A comprehensive approach to the thermal energy management of a residential building is presented to optimise the scheduling of the available thermal energy resources to meet a comfort objective. The system has a hybrid nature with both continuous variables and discrete, logic-driven operating modes. The proposed control strategy is organized in two hierarchical levels. At the high-level, an HMPC controller with a 24-h prediction horizon and a …
Construction Of Sno2-Graphene Composite With Half-Supported Cluster Structure As Anode Toward Superior Lithium Storage Properties, Chengling Zhu, Zhixin Chen, Shenmin Zhu, Yao Li, Hui Pan, Xin Meng, Muhammad Imtiaz, Di Zhang
Construction Of Sno2-Graphene Composite With Half-Supported Cluster Structure As Anode Toward Superior Lithium Storage Properties, Chengling Zhu, Zhixin Chen, Shenmin Zhu, Yao Li, Hui Pan, Xin Meng, Muhammad Imtiaz, Di Zhang
Faculty of Engineering and Information Sciences - Papers: Part B
Inspired by nature, herein we designed a novel construction of SnO2 anodes with an extremely high lithium storage performance. By utilizing small sheets of graphene oxide, the partitioned-pomegranate-like structure was constructed (SnO2@C@half-rGO), in which the porous clusters of SnO2 nanoparticles are partially supported by reduced graphene oxide sheets while the rest part is exposed (half-supported), like partitioned pomegranates. When served as anode for lithium-ion batteries, SnO2@C@half-rGO exhibited considerably high specific capacity (1034.5 mAh g−1 after 200 cycles at 100 mA g−1), superior rate performance and remarkable durability (370.3 mAh g−1 …
Preparation Of Microencapsulated Phase Change Materials (Mepcm) For Thermal Energy Storage, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis, Tongyu Zhou, Yilin Li
Preparation Of Microencapsulated Phase Change Materials (Mepcm) For Thermal Energy Storage, Weiguang Su, Jo Darkwa, Georgios Kokogiannakis, Tongyu Zhou, Yilin Li
Faculty of Engineering and Information Sciences - Papers: Part B
Microencapsulated phase change materials (MEPCM) could be used for energy saving applications in buildings due to their relatively high energy storage capacities at constant temperature, which could passively reduce peak cooling loads in summer. In this study, poly(methyl methacrylate-co-methacrylic acid) (PMMA-MAA) was used as a shell material to fabricate MEPCM by crosslinking methyl methacrylate (MMA) and methacrylic acid (MAA) through in-situ suspension-like polymerization method. The effects of initiator weight percentage and the ratio of shell monomers for the preparation of MEPCM were also investigated. The experimental results showed that the best MEPCM sample was achieved with a shell monomer weight …
A Consumer-Oriented Decision-Making Approach For Selecting The Cloud Storage Service: From Paprika Perspective, Salim Al Isma'ili, Mengxiang Li, Jun Shen, Qiang He
A Consumer-Oriented Decision-Making Approach For Selecting The Cloud Storage Service: From Paprika Perspective, Salim Al Isma'ili, Mengxiang Li, Jun Shen, Qiang He
Faculty of Engineering and Information Sciences - Papers: Part B
In recent years there is a growth in the number of companies that offers cloud storage solutions. From user’s perspectives, it is becoming a challenging task to choose which cloud storage to use and from whom, based on user’s needs. In this context, no framework can evaluate the decision criteria for selection of cloud storage services. This paper proposes a solution to this problem by identifying the cloud storage criteria and introduces the PAPRIKA approach for measuring the criteria of cloud storage based on client’s preference. This work demonstrated the applicability of the framework (decision model) by testing it with …
Effect Of Storage Environment On Hydrogen Generation By The Reaction Of Al With Water, Yin-Qiang Wang, Wei-Zhuo Gai, Xia-Yu Zhang, Hong-Yi Pan, Zhenxiang Cheng, Pingguang Xu, Zhen-Yan Deng
Effect Of Storage Environment On Hydrogen Generation By The Reaction Of Al With Water, Yin-Qiang Wang, Wei-Zhuo Gai, Xia-Yu Zhang, Hong-Yi Pan, Zhenxiang Cheng, Pingguang Xu, Zhen-Yan Deng
Australian Institute for Innovative Materials - Papers
Al powder was stored in saturated water vapor, oxygen, nitrogen and drying air separately for a time period of up to six months, the degradation behavior of Al activity was characterized by the reaction of Al with water. It was found that water vapor decreased the induction time for the beginning of Al-water reaction and reduced the total hydrogen generation per unit weight of Al, while oxygen increased the induction time and retarded the Al-water reaction. In contrast, the effect of nitrogen and drying air on Al activity was weak. The mechanism analyses indicated that water vapor promoted the hydration …