Composite metal foam/PCM energy store design for dwelling space air heating

Talebizadehsardari, Pouyan; Grant, David M.; Giddings, Donald; Walker, Gavin S.; Gillott, Mark

doi:10.1016/j.enconman.2019.112151

Cited by 103 publications

(29 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensible heat is also useful to deliver the necessary heating load of a building, but due to temperature variation during the sensible heat usage, it is hard for sensible domestic heaters to provide a uniform output air temperature 6 . However, the PCM has poor thermal diffusivity, which limits the application area of latent heat storage heat exchangers (LHSHX) 7 and a uniform output temperature is difficult to achieve 8 . LHS has almost isothermal condition during phase change but it is difficult to produce uniformity of the output temperature 9 .…”

Section: Introductionmentioning

confidence: 99%

“…6 However, the PCM has poor thermal diffusivity, which limits the application area of latent heat storage heat exchangers (LHSHX) 7 and a uniform output temperature is difficult to achieve. 8 LHS has almost isothermal condition during phase change but it is difficult to produce uniformity of the output temperature. 9 There have been several studies related to enhancing the efficiency of PCM units including geometry modification and inclination angle, 10,11 adding nanoparticles, [12][13][14][15][16] adding fins, [17][18][19] adding metal foam, 20,21 using a suspension encapsulated PCM, 22,23 and integrating with heat pipes.…”

Section: Introductionmentioning

confidence: 99%

“…Further, they showed that utilizing a combined porous/PCM unit increases the rate of heat transfer between10-and 18-times during melting and solidification processes. Sardari et al 8,43,44 presented the application of composite porous/PCM in energy storage air heaters in domestic buildings. They compared the combination of the porous/PCM and the alone-PCM units and they found significant advantages of the metal foam on the unit.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

et al. 2020

Self Cite

View full text Add to dashboard Cite

Summary The effect of various arrangements of airflow channel in a proposed storage heater based on copper foam soaked in a phase change material (PCM) is investigated. Different configurations of the air channel using a serpentine channel, as well as numbers of the air channels, are examined in a representative three‐dimensional computer‐based model (Ansys Fluent). Evaluation is performed by PCM discharging rate and output air temperature of the unit. The goal is to improve both uniformity and value of air temperature. Changing the airflow arrangement using serpentine configuration to increase heat exchange surface area reduces solidification time and increases output maximum air temperature as well as pressure drop; conversely, exit air achieves lower temperature uniformity. In the case of the shortest solidification time using one air‐channel with the length of 51 cm, the solidification time reduces to almost 6 hours, compared with 13.6 hours for the straight channel with 37 cm length, with the average output temperature of 56°C compared to 41°C for the straight channel; however, the achieved temperature difference from the initial to the end of solidification time is 13.7°C compared to 4.5°C for the straight tube.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, several heat-transfer enhancement techniques have been introduced and applied to improve the thermal response of PCM-based TES systems [ 24 , 25 ]. These techniques include incorporating fins and extended surfaces [ 26 , 27 , 28 , 29 ], modifying the geometry [ 30 , 31 , 32 ], embedding porous structures [ 33 , 34 , 35 , 36 , 37 ], composing thermally high conducting particles [ 38 , 39 , 40 , 41 ], using multiple PCMs [ 42 , 43 ], nano-encapsulation [ 44 , 45 , 46 ], and using the combinations of different methods [ 43 , 47 ]. Among them, incorporating with fins is a particularly attractive option from both economic and engineering perspectives.…”

Section: Introductionmentioning

confidence: 99%

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

et al. 2020

View full text Add to dashboard Cite

Applying a well-performing heat exchanger is an efficient way to fortify the relatively low thermal response of phase-change materials (PCMs), which have broad application prospects in the fields of thermal management and energy storage. In this study, an improved PCM melting and solidification in corrugated (zigzag) plate heat exchanger are numerically examined compared with smooth (flat) plate heat exchanger in both horizontal and vertical positions. The effects of the channel width (0.5 W, W, and 2 W) and the airflow temperature (318 K, 323 K, and 328 K) are exclusively studied and reported. The results reveal the much better performance of the horizontal corrugated configuration compared with the smooth channel during both melting and solidification modes. It is found that the melting rate is about 8% faster, and the average temperature is 4 K higher in the corrugated region compared with the smooth region because of the large heat-exchange surface area, which facilitates higher rates of heat transfer into the PCM channel. In addition to the higher performance, a more compact unit can be achieved using the corrugated system. Moreover, applying the half-width PCM channel accelerates the melting rate by eight times compared to the double-width channel. Meanwhile, applying thicker channels provides faster solidification rates. The melting rate is proportional to the airflow temperature. The PCM melts within 274 s when the airflow temperature is 328 K. However, the melting time increases to 460 s for the airflow temperature of 308 K. Moreover, the PCM solidifies in 250 s and 405 s in the cases of 318 K and 328 K airflow temperatures, respectively.

show abstract

“…Consequently, the passive storage/release of latent heat through phase transitions from solid to liquid or vice versa, allows to save considerable amount of primary energy [10]. The principle of latent TES can be employed in a wide range of applications [11], such as, solar heating systems [12], building air conditioning [13], building envelope [14], production of energy-saving cementitious composites [15] and high porous insulation systems [16], waste heat recovery in residential and non-residential sectors [17], and many other applications [18].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Thermal Energy Storage Performance of Bio-Based and Paraffin-Based PCMs Using DSC Procedures

et al. 2020

View full text Add to dashboard Cite

Thermal-Energy Storage (TES) properties of organic phase change materials have been experimentally investigated and reported in this paper. Three paraffin-based Phase Change Materials (PCMs) and one bio-based PCM are considered with melting temperatures of 24 °C, 25 °C and 26 °C. Sensible heat storage capacities, melting characteristics and latent heat enthalpies of the studied PCMs are investigated through Differential Scanning Calorimetry (DSC) measurements. Two alternative methods, namely the classical dynamic DSC and a stepwise approach, are performed and compared with the aim to eliminate and/or overcome possible measurement errors. In particular, for DSC measurements this could be related to the size of the samples and its representativity, heating rate effects and low thermal conductivity of the PCMs, which may affect the results and possibly cause a loss of objectivity of the measurements. Based on results achieved from this study, clear information can be figured out on how to conduct and characterize paraffin and bio-based PCMs, and how to apply them in TES calculations for building applications and/or simulations. It is observed that both paraffinic and bio-based PCMs possess a comparable TES capacity within the selected phase transition temperature, being representative for the human thermal comfort zone. The phase change of bio-based PCMs occurred over a much narrower temperature range when compared to the wider windows characterizing the paraffin-based materials. Bio-based PCMs turned out to be very suitable for building applications and can be an environmentally friendly substitute for petroleum-based PCMs.

show abstract

Composite metal foam/PCM energy store design for dwelling space air heating

Cited by 103 publications

References 37 publications

Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger

Phase Change Process in a Zigzag Plate Latent Heat Storage System during Melting and Solidification

A Comparative Study on the Thermal Energy Storage Performance of Bio-Based and Paraffin-Based PCMs Using DSC Procedures

Contact Info

Product

Resources

About