Changes of Endothermic Peak of Expanded Graphite Based Chemical Heat Storage Materials CaxZny(OH)2(x+y)

2014 ◽  
Vol 644-650 ◽  
pp. 4731-4734
Author(s):  
Mao Sheng Zheng ◽  
Shi Min Sun ◽  
Pei Yi Shi ◽  
Jun Hu
Keyword(s):  
Heat Storage ◽  
Expanded Graphite ◽  
Endothermic Peak ◽  
Chemical Heat ◽  
Scanning Calorimetry ◽  
Storage Materials ◽  
Heat Storage Material ◽  
Heat Storage Materials ◽  
Negative Effect ◽  
Lower Temperature

Expanded graphite is used as framework material in inorganic or organic heat storage materials commonly, of which the function is to improve thermal performance of the relevant materials. However, its negative effect is unclear. In this paper, the change of endothermic temperature of chemical heat storage material CaxZny(OH)2(x+y) by graphite addition is reported. Differential scanning calorimetry (DSC) is employed to perform the measurement. The result shows that the initial temperature and width of the endothermic peak decrease due to the action of the added graphite slightly; Along with the increase of graphite content, the endothermic peak moves to lower temperature further, the width and height of the peak reduce simultaneously.

Efficiency improvement of heat storage materials for MgO/H2O/Mg(OH)2 chemical heat pumps

2016 ◽  
Vol 162 ◽  
pp. 31-39 ◽  
Author(s):  
E. Mastronardo ◽  
L. Bonaccorsi ◽  
Y. Kato ◽  
E. Piperopoulos ◽  
C. Milone
Keyword(s):  
Heat Storage ◽  
Heat Pumps ◽  
Efficiency Improvement ◽  
Chemical Heat ◽  
Storage Materials ◽  
Heat Storage Materials

scholarly journals DEVELOPMENT OF HEAT STORAGE MATERIALS BASED ON COMMODITY PARAFFINS

2020 ◽  
Vol 6 (444) ◽  
pp. 6-13
Author(s):  
I. O. Aimbetova ◽  
◽  
U. S. Suleimenov ◽  
O. A. Kostikov ◽  
R. A. Ristavletov ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Heat Storage ◽  
Thermal Characteristics ◽  
Component Composition ◽  
Storage Material ◽  
Storage Materials ◽  
Melting Temperatures ◽  
Physico Chemical ◽  
Heat Storage Material ◽  
Heat Storage Materials

Heat storage materials on the basis of liquid paraffins and their narrow fractions with the set temperature of phase transition and the increased heat capacity for enclosing the structures of buildings are received. A method of formulating compositions heat-storage materials with melting temperatures below 250C and increased heat capacity from a mixture of narrow fractions of commodity paraffins is proposed. The technique of obtaining heat-storage materials on the basis of commodity paraffin by mixing components, in obtaining HSM with specified thermal characteristics, the research of component composition, physico-chemical and thermophysical properties, in the research of their operational properties. The technical conditions for the obtained heat- storage materials on the basis of commodity paraffins are developed and the possibility of their application in the enclosing structures of buildings is substantiated. The developed heat-storage material with the set operational properties provides energy saving due to increase of heat capacity and intensity of heat exchange of enclosing designs of buildings.

Improving the Productivity of the Single Basin Solar still

2014 ◽  
Vol 592-594 ◽  
pp. 2374-2378
Author(s):  
A. Senthil Rajan ◽  
K. Raja
Keyword(s):  
Heat Storage ◽  
Sensible Heat ◽  
Solar Still ◽  
Storage Material ◽  
Storage Materials ◽  
Glass Cover ◽  
Heat Storage Material ◽  
Heat Storage Materials ◽  
Experimental Values ◽  
Water Depths

A single basin single slope solar still with 0.82mx 0.81m x 0.75m has been fabricated with G.I sheet and tested with different water depths of 2,3,4cm. Various solid and liquid sensible heat storage materials, Evaporative surface materials are used in the form of billets, in the still. To reduce glass cover temperature the outer glass was cooled by using sprinkler manually at regular interval of time. Theoretical analysis was performed and compared with experimental values. The performances of modified still were compared with conventional still of same size running under the same meteorological conditions. The solid sensible heat storage materials produces48% more productivity than conventional still. Liquid sensible heat storage material produces 19% more than conventional in till. The payback period of the still was 340 days.

scholarly journals Results of the study of shrinkage of heat-accumulating materials based on bitumen paraffin depending on temperature

2020 ◽  
Vol 77 (4) ◽  
pp. 172-179
Keyword(s):  
Phase Transition ◽  
Melting Point ◽  
Crystalline State ◽  
Heat Storage ◽  
Liquid Paraffin ◽  
Fractional Part ◽  
Storage Material ◽  
Storage Materials ◽  
Heat Storage Material ◽  
Heat Storage Materials

The article presents the results of a study of the thermal properties of heat-accumulating materials based on bitumen paraffin. Heat-accumulating materials of a phase transition with a given melting point and phase transition obtained by mixing commercial solid bitumen paraffin and liquid paraffin and by mixing individual n-alkanes of a neighboring series were considered. It is shown that the sum of the enthalpies of melting and phase transition in the crystalline state thermal storage materials based on meta moderation depends on the width of the fractional part of the heat storage materials and cleanliness of the content of n-alkanes, from the fractional part of the heat storage material and the number of odd and even n-alkanes and their correlation, with the same melting point.

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