Renewable energy systems for building heating, cooling
With the modernisation of buildings, thermal energy storage and heat pumps with backup gas boilers, total costs are reduced by up to 17%. ... The results show that when thermal and electrical efficiency of PVT are set to 0.6 and 0.15 and the efficiency of storage unit heat exchanger is considered to be equal to 0.9 the heating demand …
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Optimization of Solution Flow Rate and Heat Transfer
The heat transfer effectiveness of the two-stage AHE is 0.954∼1.196 while the heat load rate ranges from 46.8% to 94.1%, and the outlet water temperature of the primary network is averagely 4.93 ...
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(PDF) Study on heat transfer enhancement of solar finned
Figure 7 shows the change curve of liquid phase ratio at differ ent time in finned tube regenerator. wi th t = 1, D2 = 28, a nd d if fe ren t f in n umb er of c. W hen the nu mber of fins is c = 3 ...
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Numerical and experimental investigation of the flow and heat transfer characteristics for cold storage heat exchanger …
A validated unsteady mathematical model of the cold storage heat exchanger was established to analyze the transient evolution of temperature, velocity, …
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Clean & Cool_Compact Heat Exchanger,Fin-Tube …
Jiangsu Clean & Cool Seiko Technology Co., Ltd. The company takes the development and production of various heat exchangers as the core is a high-tech production service enterprise integrating heat exchange …
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A novel compression-assisted energy storage heat transformer …
Parametric analysis is conducted to ascertain the influence of heat source temperature and the mass flow rate ratio between the solution and the heat transfer fluid on the performance of the STB. The maximum values of energy storage density (ESD) and coefficient of performance (COP) are estimated as 207.73 kWh/m 3 and 0.74, …
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Advances in thermal energy storage: Fundamentals and …
Sensible heat storage (SHS) involves heating a solid or liquid to store thermal energy, considering specific heat and temperature variations during phase …
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An approximate analytical solution for the movement of the phase …
Latent thermal energy storage (LTES) heat exchangers are being applied in a wide range of energy systems.However, there is no analytical method to determine the outlet temperature of LTES heat exchangers from its operational conditions. This hinders experimental data reduction and sizing of these components for specific energy systems.
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Optimization Research on the Heat Transfer Capacity of an
The thermal management system (TMS) for aircraft fuel is a critical component of integrated TMSs in aircraft. As such, its optimal design is necessary to ensure the efficient completion of flight missions. This study presents the model building of a numerical simulation model for the fuel TMS, with the objective of minimizing fuel return …
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Phase Change Material (PCM) Microcapsules for Thermal Energy Storage ...
Compared to sensible heat, latent heat storage is a more efficient method and provides a much higher energy density with a smaller temperature difference between storing and releasing heat [8, 9]. Phase change materials (PCMs), also called latent heat storage materials, can store/release a large amount of energy through forming and …
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Compression-assisted adsorption thermal battery based on …
Fig. 2 indicates the concept of CATB for energy storage and release, which aims to reveal its vast potential in various heating applications. Compared with basic ATB, a compressor is integrated between HTS reactor and LTS reactor. LTS reactor is used to replace a heat exchanger, which is filled with liquid ammonia as a basic adsorption type.
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Yi JIANG | Head,Building energy research centre | Tsinghua …
On the basis of the conventional plate heat exchanger, a flexibly adjusted zonal absorption heat exchanger utilized in the heating station for high-rise buildings is...
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Heat Exchanger Modeling, Sizing, and Design
Water flowing at a rate of 0.723 / enters the inside of a countercurrent, double-pipe heat exchanger at 300.K and is heated by an oil stream that enters at 385 at a rate of. 3.2 / . The heat capacity of the oil is 1.89 /, and the average heat capacity of the water of the temperature range of interest is 4.192 / .
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Binfan JIANG | Professor (Associate) | Ph.D
-PM2.5 formation mechanism in complex air pollution in China -Energy efficiency in industry -heat transfer -Waste heat recovery -Energy storage
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Latent Heat Storage Materials and Systems: A Review
The use of a latent heat storage system using Phase Change Materials (PCM) is an effective way of storing thermal energy (solar energy, off-peak electricity, industrial waste heat) and has the advantages of high storage density and the isothermal nature of the storage process. ... Abe, Y., Kanari, K., Swata, S., Tani, T., Ozawa, T. …
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Fan YUBIN | Zhejiang University, Hangzhou | ZJU
This paper proposes an air source heat pump (ASHP) system integrated with a latent heat thermal energy storage (LTES) unit based on a specially-designed heat exchanger, condensing heat storage ...
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Numerical analysis on lunar heat storage system: Multi-objective ...
The lunar base heat storage system is one of the best solutions because it is possible to transfer energy from day to night for power generation. However, due to the diversity of energy demands of the lunar base, it is inevitable to study the thermal storage performance of the heat storage system at different periods. ... Jiang Qin: Supervision ...
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Applications and technological challenges for heat recovery, …
Thermal energy storage (TES) technology is considered to have the greatest potential to balance the demand and supply overcoming the intermittency and …
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Optimization of solution flow rate and heat transfer area allocation …
@article{Yuhao2020OptimizationOS, title={Optimization of solution flow rate and heat transfer area allocation in the two-stage absorption heat exchanger system based on a complete heat and mass transfer simulation model}, author={Yi Yuhao and Xiaoyun Xie and Yi Jiang}, journal={Applied Thermal Engineering}, year={2020}, url={https://api ...
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wenjiong cao
International journal of heat and mass transfer 138, 1178-1187, 2019. 120: ... Y Wang, P Peng, W Cao, T Dong, Y Zheng, B Lei, Y Shi, F Jiang. Applied Thermal Engineering 180, 115772, 2020. 43: 2020: Heat dissipation of high-power light emitting diode chip on board by a novel flat plate heat pipe. ... Energy Storage Science and Technology 9 (5 ...
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Thermal performance of a plate-type latent heat thermal energy storage ...
With this aspect ratio, a staggered heat exchanger with an energy storage capacity of 1800 kJ was designed, as shown in Fig. 14. The total PCM volume was 0.01 m 3 for different structures. During energy storage, the heat transfer fluid (HTF) whose temperature was higher than the melting point of paraffin entered the heat …
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Numerical investigation on the melting of nanoparticle ...
Latent heat storage units are widely used in building heating systems due to its high energy storage density, whereas the practical performances of them are limited by the low thermal conductivities of phase change materials. In this paper, copper nanoparticles were added into paraffin to enhance the heat transfer rate of a latent heat …
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1.5: Heat Transfer, Specific Heat, and Calorimetry
A practical approximation for the relationship between heat transfer and temperature change is: Q = mcΔT, where Q is the symbol for heat transfer ("quantity of heat"), m is the mass of the substance, and ΔT is the change in temperature. The symbol c stands for the specific heat (also called " specific heat capacity ") and depends on ...
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Simulation and optimization of square fin concentric tube heat storage ...
With the increasing proportion of new energy generation and the increasing depth of peaking of thermal power generation, the contradiction between supply and demand in energy is becoming increasingly prominent, and energy storage technology has become a research hotspot. 1,2 Phase change heat storage technology has a broad …
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Melting enhancement of PCM in a finned tube latent heat thermal energy ...
Introduction. Energy storage is critical in thermal systems that use intermittent energy sources such as solar energy. Although less difficult, sensible heat storage needs large volumes to store the storage material and also exhibits temperature change throughout the charge/discharge cycles 1, 2.On the other hand, latent heat …
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A study on the performance of a geothermal heat exchanger under coupled ...
The above model for the GHE was integrated into a simulation program for ISCS&GSHP system [20] previously developed by the authors, and simulation studies on the heat transfer between the GHE and its surrounding soil under both winter and summer operating conditions and with and without the presence of groundwater have been carried …
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HEAT EXCHANGERS FOR THERMAL ENERGY …
HEAT EXCHANGERS FOR THERMAL ENERGY STORAGE The ideal heat exchanger… What are the requirements? • Big increase in exchanger enquiries for Long Duration, High Capacity energy storage (10''s/100''s MWhrs) • Such exchangers require 1,000''s m² of heat transfer area plus many (if not all) of the following: 1.
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Phase change material-integrated latent heat storage systems for ...
DOI: 10.1039/d1ee00527h Corpus ID: 237718545; Phase change material-integrated latent heat storage systems for sustainable energy solutions @article{Aftab2021PhaseCM, title={Phase change material-integrated latent heat storage systems for sustainable energy solutions}, author={Waseem Aftab and Ali Usman and …
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Integration of Phase Change Material-Based Storage in Air …
This paper presents a novel energy storage solution by incorporating phase change material (PCM) in the building supply-air duct toincrease a building''sthermal storage capacity. This solution has various advantages compared to PCM-integrated walls including more effective heat transfer (forced convection and greater temperature differentials).
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Meshless Optimization of Triply Periodic Minimal Surface Based …
DOI: 10.1016/j.cad.2023.103554 Corpus ID: 258926193; Meshless Optimization of Triply Periodic Minimal Surface Based Two-Fluid Heat Exchanger @article{Jiang2023MeshlessOO, title={Meshless Optimization of Triply Periodic Minimal Surface Based Two-Fluid Heat Exchanger}, author={Yu Jiang and Jiangbei Hu and …
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Performance analysis on open thermochemical sorption heat storage …
Internal mass transfer coefficient is considered as a key parameter for open thermochemical sorption heat storage which usually has a large margin between theoretical and actual value. This paper aims to analyze the role of mass transfer on system performance prediction. Al 2 O 3 and LiCl composite sorbents are prepared and …
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