scholarly journals Experimental Study on the Combined Heating of Phase-Change Water Tank and Different Terminal Cooling Equipment

2021 ◽  
Vol 2087 (1) ◽  
pp. 012036
Author(s):  
Hang Zou ◽  
Zhanqiang Liu ◽  
Enshen Long
Keyword(s):  
Experimental Study ◽  
Thermal Comfort ◽  
Phase Change ◽  
Human Body ◽  
Capillary Tube ◽  
Heating Temperature ◽  
Storage System ◽  
Longitudinal Distribution ◽  
Water Tank ◽  
Indoor Temperature

Abstract In this paper, we set up a solar energy-phase change heat storage system and experimental study on the matching of the phase-change tank and three different terminal cooling equipment. Among them, phase-change water tank is used as heat source, meanwhile, radiator, heater and capillary as terminal cooling equipment. When radiator the terminal is radiator, the indoor temperature is difficult to meet the heating temperature requirements. When the terminal is heater, the indoor temperature can meet the requirements of heating temperature. However, the longitudinal distribution and lateral distribution of indoor air temperature are unevenly distributed and affect the thermal comfort of human body. When the terminal is capillary tube, the indoor temperature maintain at a high temperature and the temperature is satisfied with the thermal comfort of human body. Therefore, the capillary tube as the terminal cooling equipment is more advantageous of matching with the phase-change tank.

scholarly journals Analysis of EEG, Cardiac Activity Status, and Thermal Comfort According to the Type of Cooling Seat during Rest in Indoor Temperature

2020 ◽  
Vol 11 (1) ◽  
pp. 97
Author(s):  
Yunchan Shin ◽  
Minjung Lee ◽  
Honghyun Cho
Keyword(s):  
Thermal Comfort ◽  
Human Body ◽  
Cold Water ◽  
Cardiac Activity ◽  
Satisfaction Level ◽  
Water Cooling ◽  
Indoor Temperature ◽  
Sensorimotor Rhythm ◽  
Electroencephalogram Eeg ◽  
Wave Reduction

In this study, electroencephalogram (EEG) and cardiac activity status of the human body while using various types of seats during rest were analyzed in indoor summer conditions. Thermal comfort was also evaluated through a subjective survey. The EEG, cardiac activity status, and subjective survey during rest indicated that the use of ventilation and cold water-cooling seats was effective. This effectiveness was because of the θ-wave and α-wave activation, sensorimotor rhythm, β-wave reduction, and left hemisphere activation, demonstrating that the conditions applied were suitable for rest. According to the analysis of the subjective questionnaire survey, the use of ventilation and cold water-cooling seats provided a more pleasant state than the basic seat, improving the subject’s warmth and comfort, and also the concentration. In addition, the use of a cold water-cooling seat provided the highest satisfaction level, being the most favorable condition for rest.

scholarly journals Charging-discharging characteristics of macro-encapsulated phase change materials in an active thermal energy storage system for a solar drying kiln

2017 ◽  
Vol 21 (6 Part A) ◽  
pp. 2525-2532 ◽  
Author(s):  
Shailendra Kumar ◽  
Kishan Kumar
Keyword(s):  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials ◽  
Storage System ◽  
Thermal Storage ◽  
Water Tank ◽  
Solar Drying ◽  
Solidification Temperature ◽  
Water Storage Tank ◽  
Melting And Solidification

The present study explores suitability of two phase change materials (PCM) for development of an active thermal storage system for a solar drying kiln by studying their melting and solidification behaviors. A double glass glazing prototype solar kiln was used in the study. The storage system consisted of a water storage tank with PCM placed inside the water in high density polyethylene containers. The water in the tank was heated with help of solar energy using an evacuated tube collector array. The melting and solidification temperature curves of PCM were obtained by charging and discharging the water tank. The study illustrated the utility of the PCM in using the stored thermal energy during their discharge to enhance the temperature inside the kiln. The rate of temperature reduction was found to be higher for paraffin wax as compared to a fatty acid based PCM. The water temperature during the discharge of the PCM showed dependence on the discharge characteristics of each PCM suggesting their suitability in designing active thermal storage systems.

scholarly journals Experimental Study on Dynamic Heat Release Performance of Water Tank with Phase Change Materials

2019 ◽  
Vol 158 ◽  
pp. 5006-5013 ◽  
Author(s):  
Jin Li ◽  
Enshen Long ◽  
Fei Liang ◽  
Hang Zou ◽  
Ning Mao
Keyword(s):  
Experimental Study ◽  
Phase Change ◽  
Heat Release ◽  
Phase Change Materials ◽  
Water Tank

scholarly journals Effect of Phase Change Material Cooling Vests on Body Thermoregulation and Thermal Comfort of Patients With Paraplegia: A Human Subject Experimental Study

2021 ◽  
pp. 219256822110491
Author(s):  
Charbel K. Moussalem ◽  
Farah Mneimneh ◽  
Rana Sarieddine ◽  
Shadi Bsat ◽  
Mohamad N. El Houshiemy ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Comfort ◽  
Phase Change ◽  
Phase Change Material ◽  
Recovery Period ◽  
Thoracic Spinal Cord ◽  
Increased Risk ◽  
Cord Injury ◽  
Cooling Effects ◽  
Change Material

Study design Randomized experimental study. Objective Compared to able-bodied people, patients with paraplegia due to thoracic spinal cord injury (SCI) are at an increased risk of heat illnesses during exercise due to impaired thermoregulatory responses. To overcome this limitation, we investigated the performance of three phase change material (PCM) cooling vests of different melting temperatures (Eijsvogels, #49) and coverage area of the trunk. Methods Sixteen participants were divided into three groups according to their injury level. All were tested for V20 full vest (20°C Tm, 75% coverage). Mid-thoracic and high-thoracic groups were tested for V14 vest (14°C Tm, 75% coverage). The mid-thoracic group was tested for V20 half vest (20°C Tm, 50% coverage). The participants performed a 30-min arm-crank exercise followed by a recovery period inside a controlled hot climatic chamber. The heart rate, segmental skin (Tskin), and core temperature (Tcore) values were recorded, and subjective questionnaires were taken. Results Compared to no vest (NV) test, all the vests showed an effective decrease in Tskin values of the trunk. However, the decrease in Tskin was not enough to induce a significant decrease in Tcore in all three groups. Mid-thoracic and low-thoracic groups showed a reduction in the increasing Tcore by the end of the exercise and recovery period. Finally, the level of thermal comfort was enhanced for the three groups. Conclusion The effectiveness of cooling vests for persons with paraplegia is dependent on injury level and thus the ratio of sensate to insensate skin. Future studies necessitate the investigation of the cooling effects of PCM vests at a lower Tm with a larger sample size.

Experimental study on heat storage system using phase-change material in a diesel engine

Energy ◽  
2017 ◽  
Vol 119 ◽  
pp. 1108-1118 ◽  
Author(s):  
Sangki Park ◽  
Seungchul Woo ◽  
Jungwook Shon ◽  
Kihyung Lee
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Phase Change ◽  
Phase Change Material ◽  
Heat Storage ◽  
Storage System ◽  
Change Material
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