Performance of direct contact latent heat storage units with two hydrated salts
- Jordan Univ. of Science and Technology, Irbid (Jordan)
- Univ. of Basrah (Iraq)
The performance of a direct contact latent heat storage unit, that consists of two columns with different hydrated salts, has been investigated. Na[sub 2]CO[sub 3]-10H[sub 2]O (sodium carbonate decahydrate) and Na[sub 2]S[sub 2]O[sub 3][center dot]5H[sub 2]O (sodium thiosulphate pentahydrate) were contained in separate columns both having an inside diameter and total length of 0.184 m and 1.0 m, respectively. During heat charge, the hot keresone as a heat transfer fluid was bubbled through the sodium thiosulfate solution first. The partially cooled kerosene was then pumped to the second column containing the sodium thiosulfate solution first. The partially cooled kerosene was then pumped to the second column containing the sodium carbonate solution, discharging most of its heat content. Flow direction was reversed during heat discharge. The continuous phase temperature in the two columns, as well as kerosene inlet and outlet temperatures, were measured continuously. Results showed significant improvement in heat transfer rates by using two separate columns containing similar or different salts. The use of a combination of two different salts, having different crystallization temperatures, and contained in different columns connected in series, may provide better means of heat storage by allowing the system to operate as a phase change storage for longer periods of operation. This is particularly suitable for solar energy applications in which the collector temperature may vary significantly during the day.
- OSTI ID:
- 5173538
- Journal Information:
- Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Vol. 52:2; ISSN 0038-092X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LATENT HEAT STORAGE
THERMAL ENERGY STORAGE EQUIPMENT
PHASE CHANGE MATERIALS
CRYSTALLIZATION
HEAT TRANSFER
PERFORMANCE TESTING
KEROSENE
SALTS
DISTILLATES
ENERGY SOURCES
ENERGY STORAGE
ENERGY TRANSFER
EQUIPMENT
FOSSIL FUELS
FUELS
GAS OILS
HEAT STORAGE
LIQUID FUELS
MATERIALS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
STORAGE
TESTING
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)
142000 - Solar Energy- Heat Storage- (1980-)