Multiobjective Optimization of Thermal Control Strategies for Multifunctional Structures

Zeminiani, Eleonora; Cencetti, Michele; Maggiore, Paolo

doi:10.1061/(asce)as.1943-5525.0000339

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…For example, functional clothing such as thermal jackets and heated jackets with active warming functions have been recently commercialized. In particular, Warm X and SEFAR Power Heat have launched functional warm clothing with improved fit by using novel textile manufacturing techniques such as knitting and embroidery [ 20 ]. SEFAR power heat has a polyester monofilament mesh structure and is capable of rapid heating and maintaining thermal insulation in case of cuts or other partial damage.…”

Section: Introductionmentioning

confidence: 99%

Properties of Surface Heating Textile for Functional Warm Clothing Based on a Composite Heating Element with a Positive Temperature Coefficient

Choi

Jee²,

et al. 2021

Nanomaterials

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A high-stretch positive temperature coefficient (PTC) surface heating textile (PTC-SHT) was fabricated using a composite of PTC powder and multiwall carbon nanotubes (MWCNTs). The PTC-SHT (heating area = 100 × 100 mm2) was produced by screen-printing the PTC-MWCNT composite paste onto a high-stretch textile with embroidered electrodes. Overall, the temperature increased to 56.1 °C with a power consumption of 5 W over 7 min. Subsequently, the surface temperature of the PTC-SHT remained constant despite the continued decrease in power consumption. This indicated that heating was accompanied by an increase in resistance of the PTC-SHT, which is typical of this process—i.e., heating to a constant temperature under a constant voltage over an extended period of time. In addition, 4.63 W power was required to heat the PTC-SHT surface from an external temperature of 5 to 45 °C in 10 min, after which stable low-temperature heat generation behavior was observed at a constant temperature of 50 °C, which was maintained over 40 min. In contrast, negative temperature coefficient (NTC) behavior has been observed in an NTC-SHT consisting of only MWCNTs, where a slow heating rate in the initial stage of power application and a continuous increase in surface temperature and power consumption were noted. The PTC-SHT consumed less power for heat generation than the NTC-SHT and exhibited rapid heating behavior in the initial stage of power application. The heat generation characteristics of the PTC-SHT were maintained at 95% after 100,000 cycles of 20% stretch–contraction testing, and the heating temperature remained uniformly distributed within ± 2 °C across the entire heating element. These findings demonstrated that an SHT with PTC characteristics is highly suitable for functional warm clothing applications that require low power consumption, rapid heating, stable warmth, and high durability.

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Section: Introductionmentioning

confidence: 99%

Properties of Surface Heating Textile for Functional Warm Clothing Based on a Composite Heating Element with a Positive Temperature Coefficient

Choi

Jee²,

et al. 2021

Nanomaterials

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“…For the fact that electronic devices usually operate at room temperature, a series of novel PTC materials with room temperature Curie point were prepared [14], which laid the foundation for precise thermal control of electronic devices. However, when using PTC materials for adaptive temperature control, this method is limited to the Curie temperature of the material, and it cannot be precisely controlled to the desired temperature point; when combining PTC materials with switch control method for precise temperature control, although this method is simple in structure and easy to implement, it has shortcomings of large temperature fluctuation, low temperature control accuracy and low energy efficiency [15,16].…”

mentioning

confidence: 99%

Study on PID temperature control performance of a novel PTC material with room temperature Curie point

Song

Cheng

et al. 2016

International Journal of Heat and Mass Transfer

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Positive Temperature Coefficient (PTC) material is a kind of thermo-sensitive material, using PTC resistors to replace the ordinary resistive materials as heating elements may become a new means of precise temperature control for electronic devices. In this paper, a novel PTC material with Curie temperature of 34℃ was prepared and the new thermal control method of combining PTC material with Proportional-Integral-Derivative (PID) control algorithm was proposed. The experimental system and mathematical model of PID temperature control by using PTC material were established.Based on this, the PID temperature control performance of PTC material was investigated with a comparison of ordinary resistance heater experimentally and theoretically. The results show that using PTC material for PID temperature control can effectively reduce overshoot; while the parameters of PID controller are within certain ranges, temperature control effects of PTC material are superior to ordinary heater, the temperature overshoot is reduced and the temperature control accuracy is increased. Furthermore, preparing PTC material with larger resistance-temperature coefficient may likely contribute to improve its PID temperature control effect. The research results specify possible directions for PID temperature control by using PTC materials in order to achieve precise thermal

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Study on dynamic thermal control performance of positive temperature coefficient (PTC) material based on a novel heat transfer model considering internal heat transfer

Wang

Pan

Nian

et al. 2020

Applied Thermal Engineering

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Multiobjective Optimization of Thermal Control Strategies for Multifunctional Structures

Cited by 4 publications

References 18 publications

Properties of Surface Heating Textile for Functional Warm Clothing Based on a Composite Heating Element with a Positive Temperature Coefficient

Properties of Surface Heating Textile for Functional Warm Clothing Based on a Composite Heating Element with a Positive Temperature Coefficient

Study on PID temperature control performance of a novel PTC material with room temperature Curie point

Study on dynamic thermal control performance of positive temperature coefficient (PTC) material based on a novel heat transfer model considering internal heat transfer

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