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
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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
Both water and homes have been heated by passive solar energy since 1882. Passive solar energy technology can best be described as thermal windows and orientation of buildings to receive the maximum amount of sunlight during the course of a day. Active heating, which utilizes solar panels, is largely a development of the 20th century. Although heating homes is a necessity during winter months, Texas needs to develop a way to cool buildings during much of the year due to high humidity and scorching temperatures. Cooling using solar energy is possible but complex since it requires an indirect technique to extract heat. The solar cooling technology was first displayed on a large scale at Trinity University in San Antonio during 1977. Texas Tech University was the first institution to develop a moderately sized solar-electric power plant in the United States. The solar-electric power plant developed by Texas Tech replaced the diesel-fueled generators used to power the City of Crosbyton. The device used to harness solar energy and convert solar radiation into electricity has been modified for usage at the Johnson and Johnson plant in Sherman, Texas as an economical electricity generating alternative (Wilder, 2013).
People have a tendency to forget that they can use the sun’s energy to heat up things. The sun has always been producing energy for billions of years and billions to come. The energy that is from the sun that is used to heat up things is called solar energy. Solar energy is used for heating up water, spaces, and fluids. For water,
There are four types of concentrated solar plant technologies: Parabolic Trough, Compact Linear Fresnel Reflector, Power Towers, and a Dish-Engine. As Solar Energy Industries Association explains, “Parabolic trough systems use curved mirrors to focus the sun’s energy onto a receiver tube that runs down the center of a trough. In the receiver tube, a high-temperature heat transfer fluid (such as a synthetic oil) absorbs the sun’s energy, reaching temperatures of 750°F or even higher, and passes through a heat exchanger to heat water and produce steam. The steam drives a conventional steam turbine power system to generate
A consultant’s report was commissioned at the beginning of the project in order to determine the most effective LCHR strategies that could be installed within the given sample of houses upon which the project was being trialled on. It was concluded that the initial plans of installing photovoltaics and combined heat and power “were deemed to be either too expensive or too impractical in terms of the project budget” (Lowery et al. (2012)). The best option available, determined by this report, was domestic solar hot water. This was a useful piece of work to undertake because whilst it would have
The solar industry is divided in three main markets: the European solar thermal market, the Chinese market and the market in other world regions. The industry is segmented in two main types of solar thermal collectors, which are evacuated tube collectors (80 per cent on average of the worldwide newly installed capacity in 2010) and flat plate collectors (20 per cent on average). This industry is characteristic of technology intensive industries with their central innovation: solar thermal water heating which radically reduces costs. They can also count on experimented installers. Each customer adopt and have
These are the panels that are placed on a home or business that capture the sun's rays and convert them into energy.
Solar energy has been used for a very long time. The first account of the use of solar energy was from the Greeks. They built their homes in a way that the sun would heat up their houses, even during the cold winters. Ancient Indians also used this method. Let's skip to 1839. In 1839, Edmond Becquerel observed that when certain material was exposed to light, it would create a small amount of electric current. This is the photovoltaic effect(A Brief). This led to John Ericsson developing what he said to be a solar powered steam engine in 1870. Now let’s jump to the late 1950s when a one-watt solar cell costed $300 and a commercial power plant watt cost $0.50 per watt. A scientist was able to demonstrate how a car can
There are two basic types of water heater – storage and tankless. They both work as their names imply.
For this project, three solar water distillers were constructed. Distiller A was composed of a bowl, a sheet of plastic wrap, a cup, a rock, and a rubber band. Distiller B was made of an automatic, plastic pet food feeder, two sheets of plastic wrap, a container,
In order for one to further understand the importance of solar energy, the problem of global warming must be explained. As defined by Webster’s Dictionary, “Global Warming” is an increase in the earth’s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. With an average increase in atmospheric temperatures, our planet is slowly deteriorating. In order to stall or halt this global destruction, countries must turn to solar energy as a cleaner alternative to the depletion of fossil fuels. Solar energy creates a homeostasis for the climate. Due to its ability to decrease global climate changes, solar power can address global warming in several ways.
Solar distillation system proves to be a good and cost effective method for water purification. The function of solar still is to produce fresh water based on evaporation process, utilizing the solar radiation as the source of energy. Solar still is a device which uses process of solar distillation. A 3 dimensional solar still is modelled at 3 different glass cover inclinations and is brought into Ansys cfd where temperature distribution in the solar still over a period of time due to direct solar irradiation over a particular location is calculated.
Solar energy is the most plentiful and purist renewable energy source available. Because it is completely natural, it is considered to be a clean energy source. It does not disrupt the environment or threaten the Eco-systems the way oil and some other energy sources tend to. Nor does it cause greenhouse gases, air or water pollution. Solar energy is an immensely important aspect of life and has been since the beginning of time. Increasingly, we are learning how to harness this important resource and use it to replace traditional energy sources. Modern technology can utilize this energy in a variety of ways, such as; generating electricity, providing light or a comfortable interior environment, and heating water for domestic, industrial, or commercial use. One day solar energy may well become our primary form of energy. This would lead to a clean environment, less money spent on utilities, and a healthier world. It is highly important because it has the potential to allow technology and nature to co-exist peacefully.
Solar energy is transferred to the earth through radiation and the energy reaching the top of the earth’s atmosphere is estimated at 1400watts/m2. It is used directly for a wide range of human life activities including simple domestic use - drying cloths, crop and providing hot water for home use; commercial generation of electricity using photovoltaic equipment; and heating water to drive turbines in thermal electric generators. In recent times photovoltaic cells are used to convert sunlight into electricity with 40 percent efficiency Another method of using solar energy to generate electricity also used in recent times is to convert the sun’s energy into heat which is then stored in thermal tanks. The thermal tanks contain molten salts or paraffin wax which can absorb tremendous amount of heat energy without changing state. The heat can then be used as a heat source in steam engines to drive electric generators. Such thermal tanks usually have capacities of up to 1.44 Tera joules per 68m3. Grid tie allows excess energy to be sent to the transmission grid; the rest of the electricity can then be stored or used directly with solar inverters for AC
Abstract - This paper is worried with Design and Fabrication of Helical Coiled Solar Water Heater with auto GPS beacon under the neighborhood climatic condition. Sunlight based Parabolic Dish is at present utilized for the Water warming and cooking applications. For the most part Solar Parabolic Dishes are altered center point concentrators, yet so as to accomplish higher warm productivity we attempted to make itline center concentrator by utilizing a one of a kind beneficiary (copper tube as helical loop) mounted at central point.We are utilizing copper helical curled through which water will circle. Helical loop as more warm proficiency contrasted with straight tube curl. This paper presents trial stage in view of the configuration, improvement and execution qualities of direct boiling point water era via auto-following sun powered illustrative dish concentrating framework. Because of auto following framework in daytime consistent boiling point water will be accessible.
Abstract - This paper is concerned with Design & Fabrication of Helical Coiled Solar Water Heater with auto tracking device under the local climatic condition. Solar Parabolic Dish is currently used for the Water heating and cooking applications. Generally Solar Parabolic Dishes are fixed focus point concentrators, but in order to achieve higher thermal efficiency we tried to make itline focus concentrator by using a unique receiver (copper tube in the form of helical coil) mounted at focal point.We are using copper helical coiled through which water will circulate. Helical coil as more thermal efficiency compared to straight tube coil. This paper presents experimental platform based on the design, development and performance characteristics of direct hot water generation by auto-tracking solar parabolic dish concentrating system. Due to auto tracking system in daytime continuous hot water will be available.