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Register a new userDesign and Evaluation of Performance Domestic Solar Photovoltaic DC Refrigerator
تصميم وتقييم أداء براد كهروشمسي منزلي
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Tartous University رسالة ماجستير
Publication date
2018
fields
Technical Architecture
and research's language is
العربية
Created by
Shamra Editor
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تركز الدراسات الحالية في معظم البلدان النامية على تطوير تقنيات التبريد وذلك بسبب التغذية الكهريائية غير الموثوقة والحاجة الملحة للتبريد الموثوق في المناطق المربوطة مع الشبكة أو المستقلة عنها . في هذا البحث تم تقييم أداء براد طوّر ليعمل بالتيار المستمر DC سعة 112L , حيث تم استبدال ضاغط AC ذو سرة وحيدة بضاغط VSDC ذو سرعة متغيرة يمكن تشغيله بواسطة نظام PV الشمسي بدون إنفرتر.
Current studies in most developing countries focus on the development of cooling technologies due to the unreliable electrical supply and the urgent need for reliable cooling in areas connected to or independent of the network. In this research, the performance of a 112L DC refrigerator was evaluated, whereby a single screw AC compressor was replaced by a variable speed VSDC compressor that can be operated by a solar PV system without an inverter.
References used
د.م . جاسم يوسف , وأخرون . بحث دكتوراه , الكشف والتشخيص المؤتمت للأعطال في منظومة التحكم لمحطة هجينة ريحية - شمسية مستقلة , جامعة طرطوس , 2018
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The research aims to optimize the investment in solar cooling process using two
models of vessels (clay- mineral).The study was conducted at the site of Tartous in the
month (the fourth - fifth - sixth) years (2013) and that the fruits of the tomat
o study, she
stated that the pottery is causing a drop in temperature between )4-6( degrees Celsius, and
that the metal causes the low temperature range between (3-5 ) degrees Celsius although
the fruits of tomatoes preserved pottery vessels have not undergone any damage of its
structure or texture during the period of conservation (27 days) compared to the control
which is exposed to damage during the (12 days) .
Solar Energy and Hydrogen are possible replacement options for fossil fuel, But a major drawback to the full implementation of solar energy, in particular photovoltaic (PV), is the lowering of conversion efficiency of PV cells due to elevated cell t
emperatures while in operation. Also, hydrogen must be produced in gaseous or liquid form before it can be used as fuel; but its‟ present major conversion process produces an abundance of carbon dioxide which is harming the environment through global warming. In search of resolutions to these issues, this research investigated the application of Thermal Management to Photovoltaic (PV) modules in an attempt to reverse the effects of elevated cell temperature. The investigation also examined the effects of the thermally managed PV module to a Electrolyzer (Hydrogen Generator) for the production of hydrogen gas in an environmentally friendly way.
The results of the investigation showed that the cooling system stopped the cell temperature from rising, reversed the negative effects on conversion efficiency, and increased the power output of the module by as much as 33%. The results also showed that the thermally managed PV module when coupled to the hydrogen generator impacted positively with an appreciablely increase of up to 26% in hydrogen gas production.
The electrical performance of the PV modules can be severely affected by operating temperature of silicon cells due to properties of the crystalline silicon used; the energy generated from these cells decreases with their high temperatures. To reduce
this decline in energy, the PV modules use cooling water by placing a tube containing many regular holes on the top end of the module, and water flows on the surface freely in several flows. So, with flow rate (4.224 l/min.m2), module temperature decreases up to (20C°); the record of increased value of electrical yield over the whole day is about (12.8%). and efficiency rises (from 8.31% to 9.62%) of (1.31%). With Flow rate (3.167 l/min.m2), temperature of module decreases up to (18C°); the record of increased value of electrical yield is about (9.8%), and efficiency rises by (1.03%). But with flow rate (2.112 l/min.m2), temperature of module decreases up to (15.5C°); the record of increased value of electrical yield is about (7.8%), and efficiency rises by (0.83%). Furthermore, flow of water on the surface of PV module reduces the reflection losses because the refractive index of water with (1.3) is intermediate between air (1) and glass (1.5). In addition, the surface of module remains clean.
Due to the lack of fossil fuels and its products quantities,
obtaining difficulties, and its global and local high price. It has
become necessary to look for other means and methods of
providing electrical energy far from fossil resources or suppo
rt
the existing ones.
The study is focused on renewable energy sources, especially
solar energy (both thermal and photovoltaic), wind energy as
well as biomass which are sufficiently available in the Syrian
Arab Republic.
Utilizing the renewable energy sources is the main focus of
this study, in which the investment in the field of photovoltaic
energy and economic efficiency will be reviewed and
compared to generating electricity using diesel generators.
The rising in the world’s population leads automatically to the rising in water demand. As a consequence
the lack of drinking water increases Currently, approximately 1.2 billion people globally (one-sixth of the
world’s population) do not have acc
ess to adequate clean water. Since a large part of the world’s
population is concentrated in coastal areas, the desalination of seawater seems to be a promising solution,
especially in our Arab world. An innovative stand-alone solar desalination system could be used to
produce drinking water from seawater or any brackish water sources. The great advantage of such a
system is that it combines efficient desalination technology, reverse osmosis, with a renewable energy
source. The main goal is to improve the technical feasibility of such systems, There are many advantages
of this coupling with RE resources ; first of all we separate the drinking water from the electricity grid
and its faults, save burning the fossil fuel and its emissions, and provide fresh water to remote
communities that do not have sufficient traditional energy sources. But as we see in this study we don’t
have economic benefit; because these projects depend on the electricity cost in each country and the
location and its solar specifications.
We designed and implemented a small laboratorial model for PV-RO (Photo-Voltaic Powered Reverse
Osmosis) to recognize the performance for seawater and brackish water, we faced some problems such as
embargo on Syria; so have done project using affordable local potentialities, but we craved to keep the
principle of operation, so we make it for the tap water which close to brackish.
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