Do you want to publish a course? Click here

The Effect of Applying Low Flow on the Floor Heating Solar System

تأثير تطبيق التدفق المنخفض على دارات التدفئة الأرضية العاملة بالطاقة الشمسية

1052   0   47   0 ( 0 )
 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

The basic idea of the research is to deal with the problems facing floor solar heating systems (high Constituent cost, huge size of the storage tank, difficulty of implementation ...)in addition to fuel consumption. Despite the use of solar energy for the purpose of heating, that does not mean full dispensing for heaters assistance in order to increase the temperature of water in the days which the intensity of solar radiation is low.

References used
WATSON, R.D. Radiant heating and cooling. 9780070684997, Mc.Graw Hill, USA, 2002, 657
SIMON, F; NIELS,K.Y; LOUIES,J.S. Thermal Performance of a Large Low Flow Solar Heating System With a Highly Thermally Stratified Tank. Journal of Solar Energy Engineering, Vol. 127, 6
DAYAN,M; KLEIN.S; WILLIAM,B . Analysis of serpentine collectors in low flow systems .Journal o of Solar Energy Engineering, 2002, Vol. 96, 5
rate research

Read More

The research aims to take advantage of the solar energy, as a free energy, to run a water pump powered by solar energy, and to study the effect of the intensity of solar radiation on the performance of this pump in Syrian coast conditions. This resea rch has explained the necessary mechanism for determining the capacity of the pump and the electric PV panels required for the work of the pump and the area of these panels. Studying the effect of intensity of solar radiation on the performance of water pump through studying the impact of pump altitude and solar radiation intensity on water flow range at experiment location. It demonstrated that the flow of the pump is going through two phases with the increasing values of solar radiation during the day. It was found that the increasing value of the flow of the pump before the value of (520W/m2) of Solar radiation was greater than that after (520W/m2) and this led to the loss of a part of the solar energy falling during the day, especially on sunny days, and the value of the loss was about (27%) of the total amount of solar energy falling per day.
This research aims to study the effect of the tilt angle of PV panels on the daily discharge a water pump powered by solar energy, and to determine the optimal tilt of these panels during summer months in the Syrian coast. The results demonstrated t hat the change of the tilt angle of PV panels from (25˚) to (35.5˚), has no effect on the curve of the solar radiation intensity and flow rate. However the resulting impact was represented by low amount of solar energy falling onto PV panels, resulting in a reduction in hydraulic energy of the pump and consequently low flow rate per day. The study showed that the amount of water flow rate at the two angels (25˚ and 22˚) for the tilt of panels was close, with preference for the angle (22˚). Reduction of water amount from one month to another during the months (June, July, August) didn't exceed (2.5%), while it was (7.5%) in September. At angle (35.5˚), water amount was approximately constant during June, July and August, while it decreased by (6%) in September. Flowing water largely decreased at angle (35.5˚) in comparison with the two angles (25˚and 22˚), so the reduction was (13, 12, 9 and 7.5%), respectively in June, July, August and September.
This research performs thermal analysis of the central heating's radiator by the final elements method manner using Cosmos/m2.6, Where it was designing a three dimensional model of the radiator with engineering specifications that mimic one of the used radiators .Then apply a convection simulates the role of the mediator heating used and ambient temperature for concluding the mathematical behavior of thermal gradient within the radiator. Research proposing a control system depends on adjusting the intermediary of heating inside the radiator, through the installation of flow control valve which works by D.C motors at the entrance to each radiant. The research shows the inability of depending on controlling system which uses the PI controller in building a suitable control system, Because the difficulty of receiving signals from analog temperature sensor that reflect the constant readings of room temperature which makes the response of control valve for signals slow, Thus makes the use of PI unhelpful of the economic and technical side.
This research aims to study the effect of adding alloying elements and heat treatment of Zinc metal on solar energy absorbing , nine alloys ingots were manufactured by changing the percentages of added Aluminum and Copper on the pure Zinc, and thes e ratios of Aluminum were : (10% , 20% , 30% , 40 % , 50%) to demonstrate the effect of adding Aluminum to Zinc metal on solar energy absorbing , and ratios of copper were : (20% , 40%) , as well as we prepare two pure zinc samples with 99.2% of purity , one was rapidly cooled and the other slowly cooled , to demonstrate the effect of heat treatment on solar energy absorbing . In order to measure the solar energy absorbing for prepared samples , we manufactured a device depends on the methods of heat exchange between solar radiation and the surface exposed to radiation . The obtained results showed that adding Aluminum and Copper to the pure Zinc caused a decrease in solar energy absorbing . As well as increasing the percentages of adding Aluminum and Copper to the pure Zinc caused a gradually decrease in solar energy absorbing . comparing the absorbing of pure zinc samples, one was rapidly cooled and the other slowly cooled , the results showed that the sample was rapidly cooled was better than the sample slowly cooled on solar energy absorbing .
This research aims to study the effect of the digester size on its thermal requirements in order to reach the optimal economic size to him. Where were studied a batch closed digester with solar collector, where he was measuring a thermal requireme nts at the same ambient conditions with the change of the size of this digester, in order to note the relative change of the heat requirements, and to get the optimal size that requires the least amount of energy in thermophilicanaerobic digestion.
comments
Fetching comments Fetching comments
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا