Wyniki wyszukiwania - Biblioteka Nauki

1

Insights of Concentrated Solar Power Utilization – Possible Deployment in Jordan

100%

As'ad S.

Ecological Engineering & Environmental Technology

|

2024

|

tom Vol. 25, iss. 1

152--163

EN

Concentrated solar power (CSP) is a promising form of renewable energy that harnesses the immense power of the sun to generate electricity. It employs various mechanisms to concentrate sunlight onto a receiver, thereby producing high-temperature heat. This heat can be stored and converted into electricity through conventional steam turbines or for other heating applications. One of CSP’s key advantages is its ability to store thermal energy for use during cloudy periods or at night, enhancing the reliability and dispatchability of solar power. This review article offers a comprehensive introduction to CSP including its principles, technological advancements, comparison analysis, and its potential to play a crucial role in the transition to a sustainable toward carbon neutral energy future. Various statistical charts on the operational CSP plants around the world have been presented in this review and showed that there is a notable interest in the MENA region for considering this technology in their energy mix. Jordan is part of the MENA region, therefore, possible deployment of this technology in the kingdom of Jordan has been assessed as well by studying the solar radiation measurements in the southern location of the country. Analysis has concluded that Ma’an governorate has the highest solar irradiance characteristics in the country and has the lowest values of diffuse irradiance. The annual average daily global irradiance is between 3.7 kWh/m2 in January to 8.5 kWh/m2 in June, equivalent to annual global radiation of more than 2200 kWh/m2. The results have been validated using Global Solar Atlas and ener MENA high precision meteorological station installed in Ma’an. The costs and current challenges faced by this technology will also be discussed.

2

Troubleshooting Maintenance of Concentrated Photovoltaic System – A Case Study

63%

As'ad S. , Halawani M.

Journal of Ecological Engineering

|

2020

|

tom Vol. 21, nr 2

1--9

EN

Concentrated photovoltaic (CPV) is a photovoltaic technology that generates electricity from sunlight. Contrary to conventional photovoltaic systems, it uses lenses to focus the sunlight onto small, but highly efficient, multijunction solar cells. Two modules of CPV with a capacity of 6.4 kW (3.2 kW for each) were imported from AzurSpace Solar Power GMBH (Germany) and installed in Middle East University, Jordan, for testing purposes as a pilot project for this niche technology. It is worth mentioning that the installation of the units had been carried out by the faculty members. A range of technical obstacles were encountered in the process due to unclear instructions/steps from the manufacturer. A series of maintenance techniques and corrective measures were implemented in the system after one year of installation since the power output was unsatisfactory. Accordingly, the units were dismantled, and various procedures were conducted in order to ensure that the conditions of the system were on optimum level. In this paper, technical reviews and preventive setup were explained and presented.

3

Atmospheric Water Harvesting Technology: Review and Future Prospects

38%

Beithou N. , Khalid M. B. , As’ad S. , Alsaqoor S. , Borowski G. , Alshabatat N. , Andruszkiewicz A.

Journal of Ecological Engineering

|

2024

|

tom Vol. 25, nr 3

291--302

EN

Atmospheric water harvesting (AWH) devices represent a fruitful hope to cope with the water shortage problem throughout the world. The vast development in AWH technology and the wide spread of various AWH techniques will largely contribute to the implementation of AWH machines in different household, agricultural and industrial applications. In the last decades, a huge amount of research has been done on AWH methods with amazing differences in results that mislead readers and even researchers. In this study, the AWH theoretical technology developments, various AWH methods and various AWH machines in the market were reviewed. A comparison between the different theoretical methods was presented, concentration on unifying results based on area and energy consumption per harvested amount was performed for clear judgment on the different published data. The gaps between theory and market available devices were stated with recommendations for further development in AWH technology.

4

Performance Comparison of Four-Stroke Diesel Engine Fuelled by Various Biodiesel Blends and Diesel

38%

As’ad S. , Alsaqoor S. , Al-Busoul M. A. A. , Abu-Zaid M. , Joka-Yilidz M. , Borowski G. , Al-Khawaldeh M. A.

Advances in Science and Technology. Research Journal

|

2023

|

tom Vol. 17, no 4

46--52

EN

The objective of this study is to compare the performance of diesel engines, fuelled with biofuel blends extracted from corn, sunflower, and palm oils, against pure diesel. The experiments were performed using Lister LVI, single-cylinder, direct injection, four-stroke engines, with a compression ratio of 17:1. The following parameters were analysed: brake torque, brake mean effective pressure (BMEP), brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), and exhaust gas temperature (EGT). The findings indicate that the characteristics of biodiesels are close to diesel fuel. Therefore, biodiesel becomes a viable alternative to diesel fuel without any modifications. Pure diesel has higher brake thermal efficiency and lower BSFC than all the biodiesel blends tested in this study. In addition, the engine consumes less fuel for biodiesel blends than pure diesel. High exhaust temperatures are conducive to nitrogen oxides (NOx) generation; hence, this study reveals that the exhaust temperature is reduced when utilizing biodiesel compared to pure diesel. According to several tests, palm biodiesel provides greater torque and BMEP than the rest of the biodiesel blends, and pure diesel due to emitting less NOx. Therefore, it stands to reason that it would be utilized in a diesel engine.

5

Floating Photovoltaics: Assessing the Potential, Advantages, and Challenges of Harnessing Solar Energy on Water Bodies

32%

Amer A. , Attar H. , As'ad S. , Alsaqoor S. , Colak I. , Alahmer A. , Alali M. , Borowski G. , Hmada M. , Solyman A.

Journal of Ecological Engineering

|

2023

|

tom Vol. 24, nr 10

324--339

EN

The worldwide transition to a future with net-zero emissions depends heavily on solar energy. However, when land prices rise, and population density rises, the need for large land expanses to develop solar farms poses difficulties. Floating Photovoltaics (FPV) has come to light as a viable remedy to this problem. FPV, which includes mounting solar panels on bodies of water, is gaining popularity as a practical choice in many nations worldwide. A significant capacity of 404 GWp for producing clean energy might be attained by using FPV to cover only 1% of the world’s reservoirs. This review shows that FPV has several benefits over conventional ground-mounted PV systems. On the other hand, there is a large study void regarding the effects of FPV on water quality and aquatic ecosystems. This review looks at the most recent FPV research, including its advantages, disadvantages, and potential. It looks into the compatibility of various bodies of water, worldwide potential, system effectiveness, and the possibility of integrating different technologies with FPV.

6

Enhancing Thermal Performance of Hot Storage Tanks through Chimney-Type Electric Heating and Natural Circulation

32%

Beithou N. , Abdallatif N. , Khalid M. B. , Alsaqoor S. , Alahmer A. , Borowski G. , As’ad S. , Attar H. , Andruszkiewicz A.

Advances in Science and Technology. Research Journal

|

2024

|

tom Vol. 18, no 3

151--160

EN

Hot storage tanks (HST) are known for their high energy consumption, attributed to variations in usage, heat dissipation within the tank, and heat losses to the surroundings. This study proposes a chimney-type electrically heated HST, which is investigated under static mode to enhance its thermal performance. Different natural circulation areas (chimney areas) with large (9.5 cm diameter), medium (2.5 cm diameter), and small (1.5 cm diameter) sizes were utilized to examine the effect of natural circulation on the HST performance. Additionally, the influence of chimney insulation on the HST performance was also studied. The experiments revealed that the chimney significantly affected the thermal stratification within the tank. Different chimney contact diameters (9.5 cm, 2.5 cm, and 1.5 cm) were tested, showing varying degrees of thermal stratification. The results indicated that smaller chimney contact diameters led to higher thermal stratification and more rapid heating of the top layer temperatures. However, the impact of insulation on thermal performance was inconclusive, suggesting the need for more effective insulation and further investigation into the dynamic mode of operation. The findings also highlighted the faster heating of the top outer layer compared to the larger diameter, emphasizing the significance of the chimney type electrical heater in the hot storage tank.

7

Microclimate Thermal Control for Open-Air Areas

32%

Beithou N. , Khalid M. B. , As’ad S. , Attar H. , Al-Khawaldeh M. A. , Borowski G. , Rababa K. S. , Andruszkiewicz A. , Alsaqoor S.

Ecological Engineering & Environmental Technology

|

2024

|

tom Vol. 25, iss. 5

198--207

EN

Thermal comfort in openair situations is a difficult industrial task. In literature there were insufficient studies on how to control the external microclimate in a region, and there are many activities outside the house in open areas that require temperature control, such as the stadiums in hot humid countries, and tourism, and recreational areas in humid and hot climates. Openair conditioning requires huge amount of energy, that negatively affects the global warming of the earth. To reduce energy consumption microclimate control is proposed. Isolation of the controlled area is performed to reduce the amount of air-conditioned load. In this project the air conditioning of an external open area will be studied. Wind tunnel with two air flows at different temperatures, relative humilities, angle of attach and velocities will be constructed. The two flows will be allowed to intersect to gather at different conditions (different wind speeds ranging from 1 to 7 m/s, as well as a jet flow about 1 m/s and angles 60 to 90 degrees) to construct an isolation Dom for the targeted outside open area. An open area with the use of cross flow that stops the local wind speed in the targeted area and allows to keep the conditioned air for a long time in the open space. This method allows to save huge energy used continuously for the air-conditioning purpose.