THE EFFECT OF TEACHER FEEDBACK ON STUDENTS' WRITING IN SECONDARY SCHOOLS IN SINGAPORE

Abstract

Solar energy is certainly not a new concept. It has long been realised that, despite the low energy density of the incoming insolation, solar radiation has a large potential as an alternative energy source. In this project, a computer simulation of a proposed solar hot water system for high rise apartments is conducted. Following which, an economic analysis for this direct heating system is carried out. In the second part of the project, a computer simulation of three different kinds of solar cooling systems is conducted. An experiment conducted on a one-cold water tank solar cooling system at the National University of Singapore is verified from the results obtained from the computer simulation or the same system. In the economic analysis of the first system viz the direct heating system, dynamic economic parameters such as the annual inflation rate for Singapore, the bank interest rate etc are taken into consideration. Conclusions drawn from the economic study are based on the payback period and the total life cost savings.