iKnow

Performance of Different Photovoltaic Cells Operating Under the Meteorological Conditions of Singapore
Research Output | Dar Al-hikmah Library | IIUM Only

Three different types of photovoltaic solar cells were installed and connected in grid-tie inverters to run a blower or pump under the meteorological conditions of Singapore. Experiments were performed over a period of time, where all three types of cel1s, each type having a rated power of 360W, were exposed to same enviromental conditions. For a d

Optimization and Economic Analysis of a Solar Assisted Heat Pump Drying System
Research Output | Dar Al-hikmah Library | IIUM Only

A solar assisted heat pump drying system has been designed, fabricated and tested. The performance of the system has been investigated under the meteorological conditions of Singapore. This paper presents an economic optimization of a solar assisted heat pump drying system. Economic viability of solar energy heating systems is usually made by compa

Optimization of an Integrated Solar heat-Pump System
Research Output | Dar Al-hikmah Library | IIUM Only

This paper describes a method of economic optimization of an integrated solar heat pump system for space cooling, water heating and drying. The system can serve three functions simultaneously or independently. A simulation model for this system was developed to study the influence different variables. The results were validated by a series of exper

An Experimental Study of a Phase Change Storage System
Research Output | Dar Al-hikmah Library | IIUM Only

This paper describes the heat transfer process and the movement of the solid-liquid interface when the energy is added to a PCM, paraffin wax, through a vertical wall heated under conditions of uniform heat flux and constant temperature. Experiments indicate that the initial mode of heat transfer in the melting process was purely conduction control

Drying Under Inert Environment: the Quality of Mango and Rockmelon
Research Output | Dar Al-hikmah Library | IIUM Only

Extensive tests were carried out on the quality related properties, such as flavor, appearance, texture and nutritional values of mango and rockmelon samples dried under normal air heat pump dryer (HPD), modified atmosphere heat pump dryer (MAHPD) using N2, and CO2 and also vacuum and freeze dryers. For mangoes and rockmelons, the MAHPD dried sampl

A Solar heat-Pump System for air-Conditioning, Water Heating and Drying
Research Output | Dar Al-hikmah Library | IIUM Only

In this study, the performance of a three-in-one solar system is investigated. The three applications of the system are: air-conditioning, water heating and drying, which can be served simultaneously or independently. The presence of evaporator-collector enables the system to operate round the clock. Parallel arrangement of the evaporator and evapo

A Solar Assisted Desalination System Using Heat Pump
Research Output | Dar Al-hikmah Library | IIUM Only

This paper includes results of an investigation carried out on a desalination plant which consists of a direct expansion solar assisted heat pump (DXSAHP) coupled to a single-effect evaporator unit. The working fluid used in the heat pump is R134a. The distillate is obtained via falling film evaporation and flashing in the evaporator. Experiments h

Risk of Eczema, Wheezing and Respiratory Tract Infections in the First Year of Life: a Systematic Review of Vitamin D Concentrations During Pregnancy and at Birth
Research Output | Dar Al-hikmah Library | IIUM Only

Background Allergic conditions and respiratory tract infections (RTIs) are common causes of morbidity and mortality in childhood. The relationship between Vitamin D status in pregnancy (mothers), early life (infants) and health outcomes such as allergies and RTIs in infancy is unclear. To date, studies have shown conflicting results. Objective This

Algorithm as a Problem Solving Technique for Teaching and Learning of the Malay Language
Research Output | Dar Al-hikmah Library | IIUM Only

The aim of the study was to determine the effectiveness of using scratch program to teach Malay language subject. 32, 4th year students in a primary school of Seremban district participated in the study. A case study was used. The teachers teach Malay subjects using scratch programs with the theme of agriculture and title of food product from agric

The Potential Effect of Different Types of Flaxseed (Linum Usitatissimum) Extract on the Cell Viability of Oral Fibroblasts Human Cell Line
Research Output | Dar Al-hikmah Library | IIUM Only

Herbal medication and natural products have been successfully demonstrated to have general health beneficial effects. The bioactivities of flaxseed (linum usitatissimum) extract have been reported, as previous studies have shown that l. usitatissimum extract has many health and beneficial effects such as antimicrobial, anti-oxidant and anti-inflamm

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