This research was done by using a mathematical modeling for a heat storage tank by
the preparation a mathematical function using MATLAB software for charging and discharging
phase of the storage tank . it was applied partial storage strategy on a d
efault
building located in the city of Palmyra in the Syrian desert. peak cooling load (420 kW)
and storing (1420 kw-h) within a storage tank size of "30m3" So that the store of ice at
night and melting using outer fusion technology (External Melt) in thermal and electrical
peak hours in the next day .
The results showed the feasibility of a thermal modeling of the tank to cover the
air-conditioning load cooling load required ,the results also showed the shift of part of the
electrical daily load of the chiller about (576 Kw-h) with a clear reduction of mechanical
and electrical equipment with the provision of using electrical energy to a summer season
about (1376 kW-h/Season) and improving the daily electrical factor (DLF) achieves stability
of the electric system.
This paper presents the results can be generalized to large projects in the tropics
help in thermal and power consumption peak shift.
Thermal energy can be stored as a latent heat in building structures
by materials with low phase change temperature called phase
change materials (PCM).
In this paper, an analytical and mathematical study of the PCM
wallboards was done by simulat
e its thermal behavior, depending on
governing heat transfer equations which describe the phase change
process of the PCM wallboard.
In this paper, an analytical and mathematical study of the PCM
wallboards was done by simulate its thermal behavior, depending on
governing heat transfer equations which describe the phase change
process of the PCM wallboard . A mathematical model
was done
and used to simulate the thermal behavior of several different
structures of the wall (single PCM wallboard, PCM wallboard +
thermal insulation layer, PCM wallboard + a concrete block).
The objective of this investigation is to study the influence of application of phase
change material (PCM) in solar basin stills for improving its productivity.
The experimental results of this investigation showed that using phase change
materia
l (paraffin wax) in solar basin still improved its daily productivity, which increased
with increasing the mass of phase change material. The highest increase ratio of daily
productivity was 26.3[%] when using 3.5[kg] of phase change material in plastic case, and
it was 34.74[%] when using 4.5[kg] of phase change material (PCM) in metal case.
Also the experimental results of this investigation showed an increase in the period
of working basin still provided with phase change material compared with basin still
without phase change material. This is owing to the latent heat stored in phase change
material, which is emitted to water when solar radiation decreases. This results in longer
period of work for the basin still.