Showing items 1 - 9 of 9

Pengeringan asam gelugur (garcinia atroviridis) menggunakan sistem pengering suria

- Idris Zulkifle, Mohd. Hafidz Ruslan, Mohd. Yusof Othman, Zahari Ibarahim, Kamaruzzaman Sopian

  • Creator: Idris Zulkifle , Mohd. Hafidz Ruslan , Mohd. Yusof Othman , Zahari Ibarahim , Kamaruzzaman Sopian
  • Date: 2018
  • Subjects: Science
  • Language: ML
  • Type: Journal Article
  • Identifier: vital:121654 , ISSN 2180–3722 , valet-20190317-091842
  • Full Text: false
  • Description: Asam keping in the market are usually dried using conventional methods. A Portable solar drying system for rural community has been designed and tested for drying of garcinia atroviridis under Malaysia climate condition. The initial moisture content of garcinia atroviridis was 90% in wet basis. After drying, these products were used for seasoning in cooking. The final content moisture after using this solar drying system was 4.4%. The pore size for both samples was seen using an electron microscope with 500 times magnification. The biggest pore size for drying using the solar drying system is 28.4pm which is larger and more than conventional drying that around 13 pm. The pore size is an indicator of the dehydrated material and the heat supplied deeper.

Application of graphene in dye and quantum dots sensitized solar cell

- Ubani, Charles Ahamefula, Mohd. Adib Ibrahim, Mohd. Asri Mat Teridi, Kamaruzzaman Sopian, Jalil Ali, Kashif Tufail Chaudhary

Hydrophilic carbon/TiO2 colloid composite : a potential counter electrode for dye-sensitized solar cells

- Mojgan Kouhnavard, Norasikin Ahmad Ludin, Babak Vazifehkhah Ghaffari, Ikeda, Shoichiro, Kamaruzzaman Sopian, Miyake, Mikio

An efficient metal-free hydrophilic carbon as a counter electrode for dye-sensitized solar cells

- Mojgan Kouhnavard, Norasikin Ahmad Ludin, Babak Vazifehkhah Ghaffari, Kamaruzzaman Sopian, Norshazlinah Abdul Karim, Miyake, Mikio

Numerical study of hydrogen fuel combustion in compression ignition engine under argon-oxygen atmosphere

- Nik Muhammad Hafiz, Mohd. Radzi Abu Mansor, Wan Mohd. Faizal Wan Mahmood, Fadzli Ibrahim, Shahrir Abdullah, Kamaruzzaman Sopian

  • Creator: Nik Muhammad Hafiz , Mohd. Radzi Abu Mansor , Wan Mohd. Faizal Wan Mahmood , Fadzli Ibrahim , Shahrir Abdullah , Kamaruzzaman Sopian
  • Date: 2016
  • Subjects: Engineering and built environment
  • Language: ENG
  • Type: Journal Article
  • Identifier: vital:107698 , ISSN 2180–3722 , valet-20180307-121244
  • Full Text: false
  • Description: Gas emissions from automobiles are one of the major causes of air pollution in our environment today. In fact, emissions of carbon dioxide (CO2), a product of complete combustion, has become a significant factor of the global warming effect. Hydrogen, which is a renewable energy, is regarded as a promising energy to solve this problem since the final product of hydrogen (H2) combustion, is water (H2O). However, the reaction of hydrogen fuels in the air under high temperature conditions produces a high volume of harmful nitrogen oxide (NOx). Furthermore, the high auto-ignition temperature of H2 makes it difficult to ignite in a compression ignition engine in normal air. In this research, argon (Ar) is used to replace nitrogen (N2), in order to eliminate NOx and enhance combustion. Simulation for this research was conducted using Converge, computational fluid dynamics software that is based on Yanmar TF90M compression ignition engine parameters. The simulation process was initially conducted with normal air (N2-O2) as the medium of combustion; but later it was replaced with an argon-oxygen (Ar-O2) atmosphere to investigate the ignition possibility of hydrogen fuel. Hydrogen was injected at 9.95 MPa at the start of injection (SOI) at 18º BTDC. The results show that, by employing the same parameters for both simulations in normal air and argon-oxygen mediums, the combustion of hydrogen only occurred in the argon-oxygen medium. However, no combustion took place in normal air. It is therefore concluded that an argon-oxygen medium is applicable for direct hydrogen injection in a compression ignition engine.

Design characteristics of corrugated trapezoidal plate heat exchangers using nanofluids

- Azher M. Abed, Alghoul, Mohamad Ahmed, Kamaruzzaman Sopian, Hussein A. Mohammed, Hasan Sh. Majdi, Al-Shamani, Ali Najah

A review of semiconductor materials as sensitizers for quantum dot-sensitized solar cells

- Mojgan Kouhnavard, Ikeda, Shoichiro, Norasikin Ahmad Ludin, Nurul Bahiyah Ahmad Khairudin, Babak Vazifehkhah Ghaffari, Mohd. Asri Mat Teridi, Mohd. Adib Ibrahim, Suhaila Sepeai, Kamaruzzaman Sopian

Predicting the back surface temperature of photovoltaic modules in hot and humid climates

- Mohd. Afzanizam Mohd. Rosli, Sohif Mat, Kamaruzzaman Sopian, Mohd. Khairul Anuar Sharif, Mohd. Yusof Sulaiman, Elias @ Ilias Salleh, Lim, Chin Haw

  • Creator: Mohd. Afzanizam Mohd. Rosli , Sohif Mat , Kamaruzzaman Sopian , Mohd. Khairul Anuar Sharif , Mohd. Yusof Sulaiman , Elias @ Ilias Salleh , Lim, Chin Haw
  • Date: 2014
  • Subjects: Mechanical engineering
  • Language: ENG
  • Type: Journal Article
  • Identifier: vital:127310 , ISSN 2289-3873 , valet-20190813-152044
  • Full Text: false
  • Description: In this study, the temperature of the back surface of a photovoltaic (PV) module was calculated based on thermal energy balance. A 1D analysis was also conducted. Each layer was modeled in consideration of the effect of heat transfer modes, such as conduction, radiation, and convection. The temperature value of each layer is important for estimating of the efficiency the module or other PV applications. The PV thermal (PVT) is an innovative design that utilizes PV, and back surface temperature is applicable in the detailed analysis of each PVT collector layer. A few assumptions were made to simplify the analysis. Experimental and thermal modeling results are satisfactory, and irradiance does not fluctuate suddenly. The correlation coefficient (r) and the percent deviation in root mean square (e) are 0.931 and 12.1%, respectively. When irradiance fluctuates suddenly, r and e are 0.345 and 58.5%, respectively

S02 reduction using merit pila coal blending technique in fluidised bed combustion

- Kamsani Abdul Majid, Nor Fadzilah Othman, Abdul Halim Shamsuddin, Kamaruzzaman Sopian

  • Creator: Kamsani Abdul Majid , Nor Fadzilah Othman , Abdul Halim Shamsuddin , Kamaruzzaman Sopian
  • Date: 2001
  • Subjects: Engineering
  • Language: ENG
  • Type: Journal Article
  • Identifier: vital:128538 , ISSN 2289-3873 , valet-20190829-09248
  • Full Text: false
  • Description: Coal has advantages over other sources of fuels due to vast world reserves, estimated to the five folds that of gas and oil put together. From economies of scale, coal-fired power generation is the cheapest, contributing to 40% of world energy power generation. However, burning coal creates environmental effects although modern cleanup technologies are able to reduce the impact. However, clean-up facilities will cause high capital and operational costs besides creating an additional impact due to discharge of processing wastes including treatment of discharged water. Research into new technologies depending on sizes and its technological complication requires high financial investment. Therefore, coal blending technique needs to be investigated simply because it requires little modifications with small investment to the existing plants. It is the objective of this research to optimize local coal consumption by paring with other types of imported coals as blending partners. The main focus of the research is to observe in detail the reaction of blending local coal so as to obtain the optimum ratio for the blended coal to improve combustion performance. Secondly, to obtain a responsive reaction of coal blending in combustion to reduce SO2 emission. Merit Pila coal as a local coal is blended with other types of imported coals such as Blair Athol, Tanito Harum, Ulan and Datong at 10% step ratio for each blend
  • 1