Special Issue 1(3) 2018
Chief Guest Editor
Dr. Mohd Sukor Su’ait
Dr. Suhaila Sepeai, Dr. Ahmad Fazlizan Abdullah
Jurnal Kejuruteraan (Journal of Engineering) special issues of Solar Energy Research Institute (SERI) 5th Postgraduate Colloquium provides forum for papers in all areas of solar photovoltaic & advance solar cell, advance solar thermal technology, strategic renewable energy resource & impact analysis and others energy related areas. Full length papers, reviews and short communications are welcomed, on subjects such as experimentation (both techniques and data), new theoretical models, commentaries work and letters to the editor.
Table of Contents
|1.||Development and Performance Analysis of New Solar Dryer with Continuous and Intermittent Ventilation
Arina Mohd Noh*, Sohif Mat & Mohd Hafiz Ruslan
A new solar dryer has successfully developed that can be operated in two modes of ventilation which are continuous and intermittent. This paper aims to analyse and compare the efficiency of the new solar dryer with the existing dryer. Without load experiment shows that the temperature of the new solar dryer with intermittent mode can increase up to 60oC compare to 50oC and 40oC for the new solar dryer with continuous mode and the current dryer respectively. Furthermore, the intermittent mode shows a saving of 60% on the electrical energy usage compared to continuous mode. The average solar collector efficiency for continuous mode was 0.47 whereas for intermittent mode the efficiency was between 0.1 and 0.4 in no ventilation period and within 0.6 to 0.9 with force ventilation. The drying experiment of Sericite mica shows that the moisture extraction rate (MER) of the current dryer, new solar dryer with continuous and intermittent are 1.46, 1.98 and 3.07 kg/day respectively.
Keywords: Intermittent ventilation; moisture extraction rate (MER); sericite mica; solar dryer; temperature
|2.||Optimization of Phosphoric Acid-Based Emitter Formation on Silicon Wafer
Zon Fazlila Mohd Ahir*, Suhaila Sepeai & Saleem H. Zaidi
Crystalline silicon (c-Si) wafer-based solar cells have been dominating the current photovoltaic industries. However, prevalent manufacturing practices are based on environmentally-harmful chemicals and expensive methodologies. This paper reports on the development of inexpensive, environmentally-benign phosphoric acidbased
Keywords: SEfficiency; emitter junction; phosphoric acid; sheet resistance; solar cells
|3.||P-type Cu2ZnSnS4 as Multifunctional Material for Photovoltaic and Thermoelectric Application: Theoretical Investigation
Hassan Ahmoum*, Mourad Boughrara, Mohamed Kerouad, Puvaneswaran Chelvanathan, Kamaruzzaman Sopian, Mohd Sukor Su’ait*, Lee Tian Khoon, Baohai Jia & Guojian Li
In this work, a detailed information about physical properties of Cu2ZnSnS4 stannite phase by first principles calculation has been presented. Using density functional theory based on the generalized gradient approximation GGA, the structural properties such as lattice parameters and bulk modulus has been determined. In addition, structure electronic and partial density of state to characterize the electronic properties was also calculated. For the optical properties investigation, the absorption coefficient and the efficiency of energy conversion has been calculated. Finally, we have investigated on thermoelectric properties such as electrical conductivity, Seebeck coefficient, thermal conductivity and figure of merit to evaluate the potential of this material in different applications. From our results presented herein, we conclude that this material can be considered potential multifunctional material for thermoelectric and photovoltaic applications.
Keywords : Cu2ZnSnS4; first principles study; material modeling, photovoltaic; thermoelectric
|4.||Ulasan Analisis Kecekapan Tenaga dan Eksergi Pengumpul Fotovoltan-Terma (PVT) (Review of Energy and Exergy Analysis of Photovoltaic-Thermal (PVT) Collector)
Muslizainun Mustapha*, Ahmad Fudholi & Nurul Syakirah Nazri
Photovoltaic-thermal (PVT) collectors were developed by combination of photovoltaic (PV) panel and thermal collector. The combination of technologies in one system has the potential to reduce cost of materials, required space and also improves performance of collectors. The PVT collectors will produce electrical and thermal energy simultaneously. PV technology converts solar radiation into electricity while thermal collector will be converting solar energy to thermal energy. The main components of PVT collectors are PV panel, absorber plate, heat transfer fluid and insulator. Based on previous studies, PVT collectors were developed by using air, water and nanofluid as a heat transfer medium. The function of heat transfer process is to improve PV panel efficiency by removing excessive heat from module and at the same time generating thermal energy. In addition, the parameters that affecting PVT’s performances are including; mass flow rate of the fluid, area of collector, solar radiation and PV cell materials used. The overall performances of PVT collectors are depending on the electrical and thermal energy efficiencies. Therefore, the main objectives of this paper are to analyze energy and exergy efficiencies of PVT collector with different designs and types of working fluid. The performances were studied using concept of energy balance and exergy entropy analysis. Result has shown that energy and exergy efficiency are in the range of 40-75 % and 5-25 %, respectively.
Keywords: Efficiency; electrical energy; photovoltaic thermal (PVT); thermal energy; exergy
|5.||Development of Roundabout Delay Models Using Traffic Simulation Programs: A Case Study at Al-Mansour City, Iraq
Ali H.A. Alwaeli*, Kamaruzzaman Sopian, Adnan Ibrahim, Sohif Mat & Mohd Hafidz Ruslan
Recent innovations in high efficiency photovoltaic thermal (PV/T) collectors have made them most suitable renewable energy systems to be integrated in green buildings or utilized in industrial processes. This is attributed to the ability to produce electricity and thermal energy at once. The development in PV/T collectors have reached a new height with the implementation of nanofluids as cooling fluids. Another method that is gaining attraction is the use of Phase Change Material (PCM) to control the temperature of PV panels to maintain its open circuit voltage. This paper aims to review and determine the influence of nanofluids and phase change material on the performance of PV/T collectors in different system configurations (e.g. buildings, both industrial and residential). A comparison between the two, accompanied by an introduction of innovative work in this field is presented as well. The influence of nanofluids and phase change material is immense; from raising the thermal efficiency to
Keywords: Phase Change Material (PCM); nanofluids; PV/T; pay-back period; efficiency
|6.||Indoor Thermal Performance of a Retrofitted Air-Conditioned Mosque: Case Study for Penang State Mosque
Azman Hussin*, Lim Chin Haw, Sohif Mat, Ahmad Fazlizan & Elias Salleh
In a mosque environment, occupants are temporarily in the situation of various dress and congregate activities which desire comfortable environment. Inappropriate thermal comfort condition in a mosque leads the distraction in fulfilling the religious practice and also causing emotional influence. The proper setting of thermal comfort
Keywords: Air conditioning; comfort; mosque; thermal environment
|7.||Analisis Tenaga Sistem Hibrid Pengumpul Udara Fotovoltan Terma-Termoelektrik (PVT-TE) (Energy Analysis of Hybrid Photovoltaic Thermal-Thermoelectric (PVT-TE) Air Collector System)
Nurul Syakirah Nazri*, Ahmad Fudholi, Muslizainun MustaphaAbstract
In this study, a new theoretical approach (new mathematical model) encompasses the heat transfer and energy balance is proposed to determine the performance of the photovoltaic thermal (PVT) – thermoelectric (TE) air collector (PVT-TE) hybrid system. The hybrid system consists of PV panel and TE modules that can improve the energy efficiency of the system. Theoretical and experimental studies were studied using energy analysis to predict the output temperature (To) and PV temperature (Tp). To evaluate system performance, a theoretical model is developed using the energy balance analysis of this hybrid system. The matrix inverse method is used to complete the theoretical model. Effect of mass flow rate and radiation intensity is also being investigated. Experimental studies were carried out at the air flow rate of 0.02 kg/s, 0.04 kg/s and 0.07 kg/s, and radiation intensities are in the range of 342-922 W/m2. The results of the experimental and theoretical studies show that the percentage of errors between the theory and the experimental value of To and Tp are 1.14% and 1.75% respectively.
Keywords: Energy analysis; electrical; solar energy; thermoelectric thermal
|8.||Pulsed Laser Annealing of Ag-paste on n-doped Emitter
Siti Nor Fazlina Abdul Hamid*, Suhaila Sepeai, Saleem H. Zaidi & Samir Mahmmod Ahmad
Pulsed laser sources are attractive on account of their spatial and temporal controllability at room temperature. Pulsed lasers, in visible (VIS) (300 – 515 nm) and infrared (IR) (~ 900 – 1064 nm) spectral ranges, with pulse widths in micro to femtoseconds range, are used in a wide range of applications including doping, etching, texturing and deposition. In this study, an Nd-YAG dicing laser operating at 1064 nm wavelength with 200 nanosecond pulse duration has been employed to form silver ohmic contacts to an n-type emitter on a p-type silicon substrate. The laser beam was used to anneal screen-printed Ag polymer paste over a broad (~ 7 to 500 mJ/cm2) range of laser fluences. Computer numerical control software allowed fabrication of geometrical patterns with controllable diameters in 50-150-μm range. Contact resistance measurements were performed using the transmission line method (TLM). Contact resistivity exhibited fast decay from very large values to relatively constant as a function of laser fluence. This variation was attributed to laser energy below the threshold energy which no alloyed Ag/Si contact could be formed. The lowest contact resistivity at 200 mΩ.cm2 was measured at 35 mJ/cm2. This value was two orders of magnitude higher than the lowest value for thermally annealed contacts. For the laser parameters investigated here, optimum laser fluences were in 0.2-0.6 J/cm2 range. It may be possible to attain lower resistivity values trough post-laser annealing.
Keywords: Laser-fired contacts; metallization; pulsed laser; silicon solar cells; front contact
|9.||Effects of Iodide/Triiodide (I¯/I3¯) Ratios on Palm Based Polyurethane Polymer Electrolyte for Solid-State Dye-Sensitized Solar Cell
Mohamad Faizzi, Norasikin Ahmad Ludin, Mohd Sukor Su’ait*, Norani Muti Mohamed, Muhammad Ameerullah Sahudin, Khairiah Haji Badri & Azizan Ahmad
In this investigation, optimization of iodide/triiodide (I¯/I3¯) ratios on palm-based polyurethane (PU) polymer electrolyte’s composition for solid-state dye sensitized solar cell (DSSC) application is explored. Polyurethane polymer electrolyte is synthesized under nitrogen gas atmosphere by pre-polymerization reactions between palm kernel oil monoester-OH (PKO-p) and methylene diphenyl diisocyanate (MDI) at different LiI/I2 mole ratios. The effects of I¯/I3¯ mole ratios optimization on photovoltaic characteristics (short circuit current density, open circuit voltage, fill factor and power conversion efficiency), photo-response behavior (internal quantum efficiency) and internal charge transport properties (charge transport and recombination resistance, and chemical capacitances) of solid-state DSSC is examined by light-current-voltage (LIV), incident photon-tocurrent efficiency (IPCE) and electrochemical impedances spectroscopy (EIS) measurements. The currentvoltage characteristic of FTO/TiO2-dye/PU-LiI-I2/Pt at LiI/I2 1:0.125 mole ratio demonstrated a photovoltaic response with a power conversion efficiency of 1.8 % under a standard AM 1.5G illumination with 42 % of internal quantum efficiency. The short circuit current density (Jsc) and open circuit voltage (Voc) are measured at 8.7 mA cm−2 and 0.68 V, respectively. These promising results could be a first step toward a new generation of low-cost and effective solid-state DSSC.
Keywords: Bio-based polyurethane; dye sensitized solar cell; iodide/triiodide; polymer electrolytes
|10.||Feasibility Study on Hybrid Solar Photovoltaic with Diesel Generator and Battery Storage Design and Sizing Using HOMER Pro
Amanda Halim*, Ahmad Fudholi, Stephen J. Phillips, Kamaruzzaman Sopian & Mohd Hafidz Ruslan
World energy outlook in its latest 2017 edition by the International Energy Agency (IEA) reported that the global energy demand is rising slowly compared to the past, but still expected an expansion of 30% in between today and 2040. Since energy demand and world population are exponentially growing, thus world cannot just depend on the exhaustible conventional sources to meet the demand. Renewable energy resources are the best alternative for conventional resources in meeting the world’s increasing energy demand, mainly in electricity generation sector. Along with the expansion in the renewable energy technology, hybrid renewable energy system is configured in eliminating stand-alone drawbacks such as unpredictable power source, unreliable cost, and high initial and operational costs. This paper presents a study on a technique for hybrid renewable energy system design and sizing, and the feasibility of the system is determined using a hybrid optimisation of multiple energy resources pro (HOMER Pro) software. HOMER Pro software has been widely used in configuring an optimised system, considering all the equipment modelled and sized in an efficient technique and the output from HOMER Pro study is discussed.
Keywords: Hybrid renewable energy system; HOMER Pro; optimal design; optimal sizing