The Experts below are selected from a list of 34743 Experts worldwide ranked by ideXlab platform
Jianlei Niu - One of the best experts on this subject based on the ideXlab platform.
-
HT2009-88637 THE IMPACT OF SUPERCooling ON THE EFFECTIVE Cooling Storage CAPACITY OF PHASE-CHANGE MATERIALS IN NATURAL Cooling APPLICATION
2020Co-Authors: Jianlei Niu, Shuo ZhangAbstract:ABSTRACT Ice Storage is currently the dominant Cooling energy Storage method. To more effectively utilize natural, renewable Cooling sources, such as evaporative Cooling and sky-radiative Cooling, diurnal Storage media operated on daily basis at the temperate range between 10 and 20 ºC are the most desirable. In this paper, we presented our experimental investigation of micro-encapsulated paraffin slurry as Cooling Storage media for building Cooling applications. The water slurry of micro-encapsulated N-hexadecane with a melting temperature of 18 ºC were cooled to 5 ºC and heated to 25 ºC cyclically in a Storage tank of 230 litre, and it was observed that full latent heat Storage can only be realized at 5 º C due to superCooling, and the effective Cooling Storage capacity at the Cooling temperature between 5 and 18 ºC are obtained, which can be used to for Cooling Storage system design with various passive Cooling possibilities
-
experimental investigation of effects of superCooling on microencapsulated phase change material mpcm slurry thermal Storage capacities
Solar Energy Materials and Solar Cells, 2010Co-Authors: Shuo Zhang, Jianlei NiuAbstract:Abstract Ice Storage is currently the dominant Cooling energy Storage method. To more effectively utilize natural, renewable Cooling sources, such as evaporative Cooling and sky-radiative Cooling, diurnal Storage media operated on a daily basis at the temperate range between 10 and 20 °C are the most desirable. This paper will present the experimental investigation of microencapsulated paraffin slurry as Cooling Storage media for building Cooling applications. The water slurry of microencapsulated n-hexadecane with a melting temperature of 18 °C was cooled to 5 °C and heated to 25 °C cyclically in a Storage tank of 230 l, and it was observed that full latent heat Storage can only be realized at around 7 °C due to superCooling, and the effective Cooling Storage capacity at the Cooling temperature range between 5 and 18 °C are obtained, which can be used to realistically estimate Cooling Storage capacity with various natural Cooling schemes.
-
raising evaporative Cooling potentials using combined cooled ceiling and mpcm slurry Storage
Energy and Buildings, 2008Co-Authors: Xichun Wang, Jianlei Niu, A H C Van PaassenAbstract:Evaporative Cooling is able to generate the Cooling medium at a temperature approaching to the ambient wet bulb temperature. In this paper, a low-energy air-conditioning strategy is proposed, which is a combination of cooled ceiling (CC), microencapsulated phase change material (MPCM) slurry Storage and evaporative Cooling technologies. The assessment of evaporative Cooling availability and utilization is done for five representative climatic cities, including Hong Kong, Shanghai, Beijing, Lanzhou and Urumqi in China, and the energy saving potential of the proposed air-conditioning system is analyzed by using a well validated building simulation code. The results indicate that the new system offers energy saving potential up to 80% under northwestern Chinese climate and up to 10% under southeastern Chinese climate. The optimal design method of the slurry Storage tank is also proposed based on the slurry Cooling Storage behaviors and Cooling demand variations of the ceiling panels.
A H C Van Paassen - One of the best experts on this subject based on the ideXlab platform.
-
raising evaporative Cooling potentials using combined cooled ceiling and mpcm slurry Storage
Energy and Buildings, 2008Co-Authors: Xichun Wang, Jianlei Niu, A H C Van PaassenAbstract:Evaporative Cooling is able to generate the Cooling medium at a temperature approaching to the ambient wet bulb temperature. In this paper, a low-energy air-conditioning strategy is proposed, which is a combination of cooled ceiling (CC), microencapsulated phase change material (MPCM) slurry Storage and evaporative Cooling technologies. The assessment of evaporative Cooling availability and utilization is done for five representative climatic cities, including Hong Kong, Shanghai, Beijing, Lanzhou and Urumqi in China, and the energy saving potential of the proposed air-conditioning system is analyzed by using a well validated building simulation code. The results indicate that the new system offers energy saving potential up to 80% under northwestern Chinese climate and up to 10% under southeastern Chinese climate. The optimal design method of the slurry Storage tank is also proposed based on the slurry Cooling Storage behaviors and Cooling demand variations of the ceiling panels.
Fredrik Setterwall - One of the best experts on this subject based on the ideXlab platform.
-
liquid solid phase equilibrium study of tetradecane and hexadecane binary mixtures as phase change materials pcms for comfort Cooling Storage
Fluid Phase Equilibria, 2003Co-Authors: Viktoria Martin, Fredrik SetterwallAbstract:Phase diagrams (equilibrium diagrams) are a convenient way of depicting the concentration-temperature-pressure relationships of a chemical system at equilibrium. They are invaluable to PCMs thermal Storage researches and developers. In the present paper, the liquid-solid phase equilibrium of binary mixture system of tetradedcane and hexadecane has been studied. For theoretical evaluation of the thermodynamic equilibrium between the liquid phase and solid phase of tetradecane and hexadecane, several methods were compared: the UNIFAC group-contribution method, the model of Won, and Pedersen's model. The temperature-composition phase diagram of the binary system has been obtained by the calculation. The diagram illustrates a binary, isomorphous system with a temperature minimum. Differential scanning calorimetry (DSC) was used to study the phase transformation of the binary system. DSC was run at different ramp rates and results indicate that these mixtures melt and freeze over a temperature range and the temperature range depends on the DSC ramp rate, and in a short mixture concentration interval appears low temperature solid-solid peaks. From the DSC results presented, it is concluded that the behaviour of binary mixtures of n-alkanes is far more complicated than considered in earlier studies. The phase diagram and all information from DSC are very important for designing PCM Storage system.
-
technical grade paraffin waxes as phase change materials for cool thermal Storage and cool Storage systems capital cost estimation
Energy Conversion and Management, 2002Co-Authors: Bo He, Fredrik SetterwallAbstract:The present paper is confined to the discussion of technical grade paraffin waxes as phase change material (PCM) for cool Storage and the cool Storage systems capital cost investment. The objective of this study is to determine the potential for using cool Storage systems. The thermal properties of technical grade paraffin waxes as PCM are investigated, and static and dynamic cool Storage processes are discussed. The capital cost of the Cooling Storage system is estimated, which indicates the Cooling Storage system not only saves energy and other operation and maintenance costs, but also saves a significant fraction of the initial capital costs. Installing cool Storage, at less cost than conventional nonStorage equipment, can often increase the Cooling capacity of the existing system.
Quan Sui - One of the best experts on this subject based on the ideXlab platform.
-
a remote integrated energy system based on cogeneration of a concentrating solar power plant and buildings with phase change materials
Energy Conversion and Management, 2019Co-Authors: Zhixun Wang, Shitong Sun, Xiangning Lin, Chang Liu, Ning Tong, Quan SuiAbstract:Abstract Independent solar energy systems are an alternative solution for remote areas that are rich in solar resources but difficult to connect to large power grids. The scheduling ability of a concentrating solar power plant with a thermal Storage system is better than that of a photovoltaic plant; however, the high investment limits its application compared with a photovoltaic plant. Therefore, an integrated energy system is proposed in this paper. A combined heat and power unit and a concentrating solar power plant are assembled together to improve the thermal energy utilization. Buildings integrated with phase change materials are designed for heating and Cooling Storage; they provide energy savings of indoor loads and facilitate the efficient operation of conventional units. In addition, the coordinated day-ahead scheduling of the integrated system is formulated as a mixed integer linear programming model given as the minimization of operation cost. The case studies compare several energy supply modes with different forms of electricity and heating supplies. Results are in favor of the coordinated approach that shows better cost-effectiveness and development potential of the proposed energy supply mode.
Shuo Zhang - One of the best experts on this subject based on the ideXlab platform.
-
HT2009-88637 THE IMPACT OF SUPERCooling ON THE EFFECTIVE Cooling Storage CAPACITY OF PHASE-CHANGE MATERIALS IN NATURAL Cooling APPLICATION
2020Co-Authors: Jianlei Niu, Shuo ZhangAbstract:ABSTRACT Ice Storage is currently the dominant Cooling energy Storage method. To more effectively utilize natural, renewable Cooling sources, such as evaporative Cooling and sky-radiative Cooling, diurnal Storage media operated on daily basis at the temperate range between 10 and 20 ºC are the most desirable. In this paper, we presented our experimental investigation of micro-encapsulated paraffin slurry as Cooling Storage media for building Cooling applications. The water slurry of micro-encapsulated N-hexadecane with a melting temperature of 18 ºC were cooled to 5 ºC and heated to 25 ºC cyclically in a Storage tank of 230 litre, and it was observed that full latent heat Storage can only be realized at 5 º C due to superCooling, and the effective Cooling Storage capacity at the Cooling temperature between 5 and 18 ºC are obtained, which can be used to for Cooling Storage system design with various passive Cooling possibilities
-
experimental investigation of effects of superCooling on microencapsulated phase change material mpcm slurry thermal Storage capacities
Solar Energy Materials and Solar Cells, 2010Co-Authors: Shuo Zhang, Jianlei NiuAbstract:Abstract Ice Storage is currently the dominant Cooling energy Storage method. To more effectively utilize natural, renewable Cooling sources, such as evaporative Cooling and sky-radiative Cooling, diurnal Storage media operated on a daily basis at the temperate range between 10 and 20 °C are the most desirable. This paper will present the experimental investigation of microencapsulated paraffin slurry as Cooling Storage media for building Cooling applications. The water slurry of microencapsulated n-hexadecane with a melting temperature of 18 °C was cooled to 5 °C and heated to 25 °C cyclically in a Storage tank of 230 l, and it was observed that full latent heat Storage can only be realized at around 7 °C due to superCooling, and the effective Cooling Storage capacity at the Cooling temperature range between 5 and 18 °C are obtained, which can be used to realistically estimate Cooling Storage capacity with various natural Cooling schemes.