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Design of a Railway Coach Solar Heater and Pump System Essay

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DESIGN OF A RAILWAY COACH SOLAR HEATER AND PUMP SYSTEM

Contents
Chapter 2 1
Literature Review 1
1. Introduction 1
2. History of Solar Water Heating 1
3. Technical Analysis 2
4. Pump selection 5
Bibliography 6

Chapter 2
Literature Review
1. Introduction

This chapter includes history of Solar Water Heating and the technical analysis of the latest technology in Solar Water Heating systems. The analysis of the latest technology involves all aspects of Alternative Solar Water Heating systems design. Low cost alternative water heating system for the train coach, direct versus indirect systems, components and materials used was investigated.
2. History of Solar Water Heating

Solar water heating has been around for many …show more content…

Water is pumped into solar panels where it is directly heated by the sun and then pumped into storage tanks where it is stored. Direct systems are very effective but have a shorter life span when compared to indirect systems. The reason being is that, the water chemicals erode the pipes and the panels over time and hence have to be maintained regularly. Water inside the panels can freeze in colder weather conditions which may result in damaging the system (Choosing a solar geyser, 2010). Figure 1-Direct System
Advantages of a Direct System
 Service water used directly from collector loop
 No heat exchanger – more efficient heat transfer to storage
 Circulation pump needs only to overcome frictional losses.
Disadvantages of a Direct System
 It is only convenient to use them in areas where it rarely freezes and the quality of water must be really good.
Indirect systems use the same procedure but the geysers in this system have copper pipes that are used as the heating coil. Water is separated from the water inside the tank by copper pipes in this system. An antifreeze fluid circulates through the solar panels (Choosing a solar geyser, 2010). The fluid flows through the collector and then through the copper pipes inside the storage tank. The water is then indirectly heated. The indirect systems have a longer life span when compared to direct systems as there is

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