Optimization of an Air-PCM heat exchanger and elaboration of peak power reduction strategies

Mankibi, Mohamed El; Σταθόπουλος, Νικόλαος; Rezaï, Niousha; Zoubir, Amine

doi:10.1016/j.enbuild.2015.05.023

Cited by 37 publications

(8 citation statements)

References 10 publications

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“…The explicit diffusion model of a single modular HTF‐PCM tank is validated with a previous experiment conducted by Stathopoulos et al 28,29 The experiment values regarding the PCM temperature in the center of the PCM panels and the outlet HTF temperature are compared with simulated values, shown in Figure 5. The result indicates that the error in normalized mean bias (NMBE) 30 is less than ±10% and the root‐mean‐square error (RMSE) 30 is less than 30%.…”

Section: Buried Multi‐modular Water‐pcm Tank‐a Brief Introductionmentioning

confidence: 90%

Operating performance of multi‐modular water‐phase change material tanks for emergency cooling in an underground shelter

Zeng

Yuan

Cao

et al. 2021

Intl J of Energy Research

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Summary Latent heat thermal energy storage can not only alleviate the mismatch between supply and demand but also improve the performance and dependability of the energy system. Unfortunately, previous research achieves a specific engineering load shifting using a single water‐phase change material (PCM) tank, the volume of which is tailored to the specific cooling or heating load. This paper proposes the concept of multi‐modular water‐PCM tanks (MMWPT), which offer flexibility and are simple to be mass‐produced, as thermal storage in an underground shelter's emergency mode. The thermal inertia of the geothermal energy is used to remain the PCM at solid state at first and to naturally cool the tank once they are melted. The mathematical model is created in MATLAB and validated by experiment with an NMBE of less than ±10% and RMSE of less than 30%. In addition, the MMWPT's thermal performance in various matrixes was investigated in an underground shelter where the peak load occurs suddenly and with low frequency. The result reveals that the ∆Twater in the scenario with matrix form of N (number of tanks in series) × 5 (number of tanks in parallel) is almost four times as that with matrix form of N × 1. By separating the water into five parallel water tanks, the corresponding EDD is 1.27‐1.28 times larger. Changing the N from 1 to 2 and 3 could increase the EDD by 3.0%‐12.5% and 5.9%‐25%, respectively. Three acceptable MMWPT matrixes were presented using the effective discharging duration (EDD) and temperature drop as assessment criteria. Additionally, PCM with a maximum phase change temperature (Titalicpch_PCM) of 19.41°C and a connection matrix of 3 × 4 is recommended when using a single charging cycle or active cooling approach. Otherwise, a Titalicpch_PCM of 22.41°C with a connection matrix of 3 × 5 is advised. This research is planned to give references for using the MMWPT in underground shelters to shift loads.

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Section: Buried Multi‐modular Water‐pcm Tank‐a Brief Introductionmentioning

confidence: 90%

Operating performance of multi‐modular water‐phase change material tanks for emergency cooling in an underground shelter

Zeng

Yuan

Cao

et al. 2021

Intl J of Energy Research

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“…This method was chosen as it was previously used and provided good results for similar configurations [18,19].…”

Section: The Heat Balance Approachmentioning

confidence: 99%

Development and validation of the numerical model of an innovative PCM based thermal storage system

Roccamena

Mankibi

Σταθόπουλος

2019

Journal of Energy Storage

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“…The study showed that the relatively simple numerical model could accurately reproduce the experimental behavior of the PCM heat exchanger. In another study, PCM was applied in a heat exchanger for a heating application in a ventilation system, to provide load shifting during peak hours (El Mankibi et al 2015). A numerical model was developed, and a prototype was tested in a rectangular generic room.…”

Section: State Of the Artmentioning

confidence: 99%

NeGeV: next generation energy efficient ventilation system using phase change materials

et al. 2019

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Product development in the HVAC business segment are continually showing disturbingly slow annual increases in product performance, gradually reducing profitability in the market. Cooling and heating technologies applied in the HVAC industry range from simple natural cooling to more advanced active solutions based on conventional compression technology, but the performance increase is fundamentally incremental. This paper presents the NeGeV project which will provide an innovative solution demonstrating a leap in ventilation systems performance through the use of phase change materials for active heat recovery during periods of cooling needs. The project will develop, design and produce a prototype system and document its performance through certified tests. Through development of intelligent controls for the system, the project will demonstrate the potential for system integration into a smart grid application of load shifting and optimal operation control. In addition, the technical and economic feasibility of the prototype will be evaluated considering an office-space case study.

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Optimization of an Air-PCM heat exchanger and elaboration of peak power reduction strategies

Cited by 37 publications

References 10 publications

Operating performance of multi‐modular water‐phase change material tanks for emergency cooling in an underground shelter

Operating performance of multi‐modular water‐phase change material tanks for emergency cooling in an underground shelter

Development and validation of the numerical model of an innovative PCM based thermal storage system

NeGeV: next generation energy efficient ventilation system using phase change materials

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