Comparison Between the Concrete, Sand, Clay, Water and the Paraffin like Materials of Heat Storage for the Solar Water Heaters
Romdhane Ben Slama,
Raouf Abdel Moumen,
Mohamed Elgoul
Issue:
Volume 3, Issue 2, April 2017
Pages:
21-25
Received:
30 November 2016
Accepted:
9 December 2016
Published:
19 May 2017
Abstract: Solar energy, though renewable, still has a handicap of heat storage, particularly for the solar water heaters with integrated storage. Indeed, these latter present a significant night cooling. The storage material nature can influence the lifespan of the storage tanks, the quantity of stored heat and its speed of restitution. We compare here five materials for the heat storage which are sand, concrete, clay, Phase Change Material (PCM) and water like element of reference for comparisons. As for the PCM used here, it is paraffin sold in the trade, though other materials admit an enthalpy of higher fusion. If during the diurnal heating, the PCM does not reach the highest temperatures, it is because received solar energy is used for its change of state.However, from a viewpoint amount of stored heat, PCM is the best view of its high latent heat. Also for well as night cooling, the PCM keeps the temperature elevated.
Abstract: Solar energy, though renewable, still has a handicap of heat storage, particularly for the solar water heaters with integrated storage. Indeed, these latter present a significant night cooling. The storage material nature can influence the lifespan of the storage tanks, the quantity of stored heat and its speed of restitution. We compare here five ...
Show More
A Review of Challenges in Display Technology
Askari Mohammad Bagher,
Mirzaei Mahmoud Abadi Vahid,
Mirhabibi Mohsen
Issue:
Volume 3, Issue 2, April 2017
Pages:
26-39
Received:
26 January 2017
Accepted:
13 February 2017
Published:
19 May 2017
Abstract: Fast-moving tech is redefining the electronic display as screens get bigger and better. Electrically operated display devices have developed from electromechanical systems for display of text, up to all-electronic devices capable of full-motion 3D color graphic displays. Electromagnetic devices, using a solenoid coil to control a visible flag or flap, were the earliest type, and were used for text displays such as stock market prices and arrival/departure display times. In this article we will discuss about the different types of displays and also about the advantages and disadvantages different types of display technology.
Abstract: Fast-moving tech is redefining the electronic display as screens get bigger and better. Electrically operated display devices have developed from electromechanical systems for display of text, up to all-electronic devices capable of full-motion 3D color graphic displays. Electromagnetic devices, using a solenoid coil to control a visible flag or fl...
Show More
