In a competitive world with limited resources, it is important to train our students in creativity. To maintain an edge over others, it is essential to produce unusual solutions to problems and challenges. Training students in divergent thinking is considered an essential element in the development of creativity. Ideas, whatever the nature may be,

Energy and environment, both arc essential for our survival on the planet earth to ensure a deeem standard of living and good health. However, there is a price [or the comfort that we strive hard to achievc. It took forty years to realize that CFC (Chlorofluorocarbons) causes Ozone depletion. Similarly. greenhouse gases and acid rain are realities

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 cells, each type having a rated power of 360W, were exposed to same environmental conditions. For a

Membrane distillation (MD) desalination is an emerging technology for fresh water production. This process incorporates phase change and transport of vapour through a hydrophobic membrane due to difference in vapour pressure across the membrane. The results from experimental studies and the 1 dimensional transport analyses of the heat and mass tran

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

A solar assisted heat-pump system has been developed to provide cooling, water heating and drying. The energy required for the system is met by a combination of energy collected from the sun, ambient and the energy recovered from a vapor compression heat-pump system, which also serves as an air-conditioner. The presence of evaporator-collector, whi

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

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

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

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