Thermal energy storage in salt hydrates

Telkes, Maria

doi:10.1016/0165-1633(80)90033-7

Cited by 98 publications

(39 citation statements)

References 3 publications

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“…It contained approximately 4 m 3 of Glauber's salts, which were packed in steel drums located in the southern glazed sun spaces that were ventilated with fans to move the warm air into the living space during the winter. In summer months, PCM thermal storage was able to cool surrounding rooms as well (see Telkes 1978Telkes , 1980. The Dover house worked very well for two and half seasons.…”

Section: First Pcm Application For Passive Solar Heatingmentioning

confidence: 97%

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Short History of PCM Applications in Building Envelopes

Kośny

2015

Engineering Materials and Processes

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Ongoing improvements in building envelope technologies suggest that residences will soon be routinely constructed with low heating and cooling loads. The use of novel building materials containing active thermal components (e.g., PCM, subventing, radiant barriers, and integrated hydronic systems) would be an ultimate step in achieving significant heating and cooling energy savings from technological building envelope improvements. The key benefit of using PCM is that it affords structures improved thermal storage capabilities with minimal change to the existing building design (Sharma 2013). The main methods for incorporating PCM into building materials include the use of gypsum plaster boards and other structural boards, blending PCM with thermal insulations, and by macro-packaging. The thermal energy storage property of PCM is based on its latent heat storage capacity, given that large amounts of energy can be stored in a small volume. Therefore, the material containing PCM can absorb and release heat more effectively than conventional building materials. However, the selection of the PCM locations, PCM transition temperature range, and the amount of used PCM are essential for effective and durable use of the PCM-enhanced technologies, considering a relatively long life span of building envelopes.Present-day residential and commercial buildings are becoming more structurally lightweight, and concerns are been raised over indoor thermal comfort due to reduced thermal storage potential. A strong tension exists between the drive to build better efficient structures with less impact on the environment and the tendency to add more mass to the structure for thermal storage. These issues are further heightened by global climate change and the continual rise in energy cost. Without counting traditional arctic ice igloo constructions, the use of PCM in buildings began in the mid-1940s and this passive solar system with thermal storage capability was one of the first applications studied at that time (Telkes 1978;Frysinger and Sliwkowski 1987;. During the 1980s, bulk

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Section: First Pcm Application For Passive Solar Heatingmentioning

confidence: 97%

“…Initially, hydrated slats have been sampled for this purpose. Telkes (1978Telkes ( , 1980 worked on a construction similar to the Trombe wall, using Glauber's salt behind a polyhedral glazing. Her work was only a first-order theoretical analysis demonstrating the potential for energy and space savings.…”

Section: Pcm Solar Thermal Storage Wallsmentioning

confidence: 99%

Short History of PCM Applications in Building Envelopes

Kośny

2015

Engineering Materials and Processes

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“…Several researchers have investigated the performance of PCM collector-storage wall system. Telkes [25] set up the earlier PCM Trombe wall using Glaubert salt for thermal storage installed behind a polyhedral glazing but no thermal performance was reported. Experimental study by Benard et al [26] showed that controlled air circulation would give much better results; their followed work [27] indicated that the advantage of the paraffin walls over the concrete is a mass reduction and controlled front heat extraction should considerably improve the thermal performance.…”

Section: Introductionmentioning

confidence: 94%

Experimental investigations on the performance of a collector–storage wall system using phase change materials

Zhou

Pang

2015

Energy Conversion and Management

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“…In this paper, a comparative study of the performance of heat transfer is done for all three encapsulating materials, copper, brass and aluminium for with and without fins for all the PCMs used. Copper, brass and aluminium have been chosen because they have a higher thermal conductivity and are economical (Telkes 1980). The PCM was filled in spherical balls each of 100 mm diameter and 2 mm thickness.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement of the latent heat storage system using different encapsulating materials with and without fins

Beemkumar

Karthikeyan

Ramachandran

2015

International Journal of Ambient Energy

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This study is aimed at analysing the heat transfer characteristics of different encapsulating materials and the fins on the overall heat transfer in the latent heat storage system (LHSS). Experimentation is done with different phase change materials (PCMs) (D-mannitol, D-sorbitol and paraffin wax) using different encapsulating materials, i.e. copper, aluminium and brass, with and without fins. During the charging process, there is an average 15% heat loss of copper encapsulations without using fins as compared with using fins. The heat losses in aluminium and brass encapsulations are 10% and 15%, respectively. In the discharging process, 23% of heat extraction loss is seen in copper encapsulations, 5% and 18% in aluminium and brass encapsulations, respectively. The results showed that the usage of fins is an effective technique to increase the heat stored and recovered in a LHSS. The most cost-effective encapsulation is aluminium balls with fins as it has the lowest cost/kJ as compared with other two.

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Thermal energy storage in salt hydrates

Cited by 98 publications

References 3 publications

Short History of PCM Applications in Building Envelopes

Short History of PCM Applications in Building Envelopes

Experimental investigations on the performance of a collector–storage wall system using phase change materials

Heat transfer enhancement of the latent heat storage system using different encapsulating materials with and without fins

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