An Experimental Study to Investigate PQ Impacts in a Grid Connected PV System
KSV Swarna,
Arangarajan Vinayagam,
Sui Yang Khoo,
Alex Stojcevski
Issue:
Volume 5, Issue 4, July 2016
Pages:
46-58
Received:
3 May 2016
Accepted:
16 May 2016
Published:
6 June 2016
DOI:
10.11648/j.ijrse.20160504.11
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Abstract: Grid integrations of Renewable Energy (RE) is identified as one of the most prominent energy technologies to meet the growing energy demand and to build a sustainable society for future. RE resources such as rooftop PV and small wind turbines when connected to the grid will have substantial potential supply electricity with negligible impacts in network. On the other hand, grid integrated with large-scale RE resources results in adverse impacts and increases the network utility concerns especially issues involved with power quality of the distribution networks due to the intermittent nature of solar PV and wind. Hence, there is an emergent need to analyse the impacts of grid integrations for reliable power generation and distribution. The main intent of this paper is to investigate and analyse Power Quality (PQ) impacts in a network by an experimental approach. Renewable Energy Integration Facility at Common wealth Scientific and Industrial Research Organisation (CSIRO), Newcastle, Australia had been used and different experiments were proposed and analysed with various power sources and highly controllable loads. A great deal of attention has been paid in analysing PQ impacts-voltage variations, power variations, Power Factor (PF), voltage unbalance and neutral currents using low voltage mini grid facility.
Abstract: Grid integrations of Renewable Energy (RE) is identified as one of the most prominent energy technologies to meet the growing energy demand and to build a sustainable society for future. RE resources such as rooftop PV and small wind turbines when connected to the grid will have substantial potential supply electricity with negligible impacts in ne...
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Cost-Effectiveness Opportunities for Thermal Energy Storage Systems: A Case Study of School Building in Saudi Arabia
Badr Habeebullah,
Rahim Jassim,
Nedim Turkmen,
Ahmad Bokhary,
Majed Alhazmy
Issue:
Volume 5, Issue 4, July 2016
Pages:
59-70
Received:
11 June 2016
Accepted:
20 June 2016
Published:
6 July 2016
DOI:
10.11648/j.ijrse.20160504.12
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Abstract: Air conditioning in houses, office buildings and schools consume high portion of the generated electricity in Saudi Arabia. This paper presents a study of the economic opportunities afforded by installing an ice storage system to existing air conditioning plants of a school in Jeddah, Saudi Arabia. In this paper, the assumptions are i) fixed interest rate of 10%, ii) a tenure of 10 years and iii) estimated operational tariff structure depending on both the number of operating hours and the ambient temperature. The study examines both full and partial load storage scenarios then calculates the effect of various pricing tariffs on cost optimization. The results show that the current fixed electricity tariff rate of $0.0267/kWh which is not economically feasible. Combining both the energy storage and an incentive time structured rate shows reasonable daily bill savings. For a base tariff of $0.07/kWh during daytime operation and $0.0267/kWh for the off-peak period, savings of $33/d and $73.36/d is achievable for full load storage and partial load scenarios, respectively. These savings will increase to $159/d for full load storage and $124.06/d for partial load storage after 10 years.
Abstract: Air conditioning in houses, office buildings and schools consume high portion of the generated electricity in Saudi Arabia. This paper presents a study of the economic opportunities afforded by installing an ice storage system to existing air conditioning plants of a school in Jeddah, Saudi Arabia. In this paper, the assumptions are i) fixed intere...
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Energy Efficiency Evaluation from the Combustion of Selected Briquettes-Derived Agro-waste with Paper and Starch Binders
Godson Rowland Ana,
Victor Tolulope Fabunmi
Issue:
Volume 5, Issue 4, July 2016
Pages:
71-79
Received:
21 April 2016
Accepted:
29 April 2016
Published:
29 July 2016
DOI:
10.11648/j.ijrse.20160504.13
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Abstract: A lot of agricultural residues and wastes generated in the country are improperly utilized and poorly managed. The bulk is left to decompose or blazed, resulting in environmental pollution and degradation. Studies have shown that briquetting provides a means of managing this waste as fuels however, energy efficiency of this process has not been investigated extensively. This study investigated the energy efficiency associated with combustion of selected briquettes-derived agro-waste. An experimental design was adopted that involved comparing the energy efficiency from the combustion of biomass briquettes of sawdust (SD) from different trees, rice husk (RH), coconut shell (CS) and corncob (CC) with paper (p) and starch (s) binders with wood (control). Energy parameters which include calorific value (CV), bulk density (BD), and energy density (ED) were measured. Energy efficiency parameters such as water boiling time (WBT), Mass of biomass used (MB), Burning Time (BT), Burning rate (BR) and Recoverable energy (RE) from the combustion of 0.5kg mass of each of the briquette treatments in comparison with the wood was obtained. The energy parameters of the biomass briquettes ranged 12.3 – 19.6 kJ/g, 0.27 – 0.75 g/cm3 and 3.9 – 13 KJ/cm3 for CV, BD and ED respectively. The ranges of the thermal properties based on the water boiling test carried out included water boiling time, mass of biomass used and burning time were 7.75 – 62.5 min, 150 – 390 g and 53.5 – 143 min respectively. Although sawdust briquettes took least time to boil water, coconut briquettes burned efficiently in terms of material conservation and duration of burning. Therefore coconut and sawdust briquettes are both viable alternative fuel sources to firewood.
Abstract: A lot of agricultural residues and wastes generated in the country are improperly utilized and poorly managed. The bulk is left to decompose or blazed, resulting in environmental pollution and degradation. Studies have shown that briquetting provides a means of managing this waste as fuels however, energy efficiency of this process has not been inv...
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