应用于低温加热的肉豆蔻酸和硬脂酸共熔混合物的储热特性

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应用于低温加热的肉豆蔻酸和硬脂酸共熔混合物的储热特性

Ahmet Sari^a; Kamil Kaygusuz^b

^a Department of Chemistry, Gaziosmanpasa University, 60240 Tokat, Turkey
^b Department of Chemistry, Karadeniz Technical University, 61100 Trabzon, Turkey

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-04-28 发布日期:2006-04-28
通讯作者: Ahmet Saria

Thermal Energy Storage Characteristics of Myristic and Stearic Acids Eutectic Mixture for Low Temperature Heating Applications

Ahmet Sari^a; Kamil Kaygusuz^b

^aDepartment of Chemistry, Gaziosmanpasa University, 60240 Tokat, Turkey
^b Department of Chemistry, Karadeniz Technical University, 61100 Trabzon, Turkey

Received:1900-01-01 Revised:1900-01-01 Online:2006-04-28 Published:2006-04-28
Contact: Ahmet Saria

摘要/Abstract

摘要： Stearic acid (67.83℃) and myristic acid (52.32℃) have high melting temperatures that can limit their use as phase change material (PCM) in low temperature solar heating applications such as solar space and greenhouse heating in regard to climatic requirements. However, their melting temperatures can be adjusted to a suitable value by preparing a eutectic mixture of the myristic acid (MA) and the stearic acid (SA). In the present study, the thermal analysis based on differential scanning calorimetry (DSC) technique shows that the mixture of myristic acid (MA) and stearic acid (SA) in the respective composition (by mass) of 64% and 36% forms a eutectic mixture having melting temperature of 44.13℃ and the latent heat of fusion of 182.4J•g－1. The thermal energy storage characteristics of the MA-SA eutectic mixture filled in the annulus of two concentric pipes were also experimentally established. The heat recovery rate and heat charging/discharging fractions were determined with respect to the change in the mass flow rate and the inlet temperature of heat transfer fluid. Based on the results obtained by DSC analysis and by the heat charging/discharging processes of the PCM, it can be concluded that the MA-SA eutectic mixture is a potential material for low temperature thermal energy storage applications in terms of its thermo-physical and thermal characteristics.

关键词: eutectic mixture;myristic and stearic acids;phase change material;thermal energy storage;differential scanning calorimetry

Abstract: Stearic acid (67.83℃) and myristic acid (52.32℃) have high melting temperatures that can limit their use as phase change material (PCM) in low temperature solar heating applications such as solar space and greenhouse heating in regard to climatic requirements. However, their melting temperatures can be adjusted to a suitable value by preparing a eutectic mixture of the myristic acid (MA) and the stearic acid (SA). In the present study, the thermal analysis based on differential scanning calorimetry (DSC) technique shows that the mixture of myristic acid (MA) and stearic acid (SA) in the respective composition (by mass) of 64% and 36% forms a eutectic mixture having melting temperature of 44.13℃ and the latent heat of fusion of 182.4J•g－1. The thermal energy storage characteristics of the MA-SA eutectic mixture filled in the annulus of two concentric pipes were also experimentally established. The heat recovery rate and heat charging/discharging fractions were determined with respect to the change in the mass flow rate and the inlet temperature of heat transfer fluid. Based on the results obtained by DSC analysis and by the heat charging/discharging processes of the PCM, it can be concluded that the MA-SA eutectic mixture is a potential material for low temperature thermal energy storage applications in terms of its thermo-physical and thermal characteristics.

Key words: eutectic mixture, myristic and stearic acids, phase change material, thermal energy storage, differential scanning calorimetry

AhmetSari,KamilKaygusuz. 应用于低温加热的肉豆蔻酸和硬脂酸共熔混合物的储热特性[J]. , DOI: .

Ahmet Sari, Kamil Kaygusuz. Thermal Energy Storage Characteristics of Myristic and Stearic Acids Eutectic Mixture for Low Temperature Heating Applications[J]. , DOI: .

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