According to the importance of economic solar ponds in domestic and industrial
daily practical applications and its international widespread, this created the basis of an
experimental study on a prismatic solar pond. It is internally painted in bla
ck with a surface
measurement of (1m2) and a lower measurement of (0.42m2) and 1m deep. It constitutes
four levels of gradual salinity separated by transparent glassy tablets /home glass/ of
(6mm) thickness. On its lower level, a black solid mass is placed (black volcanic stones of
equal dimensions; almost around 1cm). Upon studying the temperature and the stored
thermal amounts of via subsidiary time every day from 9 am until 5 pm, the average rate of
stored thermal amount each hour calculated according to the following equation:
(Q = m.Cp.ΔT) during six months (February until July 2016) was:
9962.445 KJ, 9516.28 KJ, 10783.471 KJ, 9765.836 KJ, 14010.393 KJ, 12164.320 KJ
respectively.
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.
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.
This research shows the necessity of building the solar electric generating system to provide a clean renewable energy and to meet people's needs of electrical energy at Peak-Load to keep a clean environment in Palmyra region. This paper concluded a
study of electric generating power plant with 30 MW capacity during day. A part of heat power collected in a solar field is stored in sensible thermal energy storage for covering Electrical Peak Load when the plant operates at night. This research showed the advantage of constructing the solar system with a Parabolic Trough in the solar
field. The amount of heat collected during months of the year is high and the hours operating at daytime were great. The building of solar-electric plant is valid technically and economically. This research performed a design of solar field and its Parameters using Computer Program (Language C++) and calculated the most important plant
performance during months of the year.
