Solar hot water systems consist of solar collector panels on the roof of a building and a storage tank. The sun's rays heat the water much the same as water in a hose left on the lawn on a hot day. Because they only generate hot water when the sun is shining, they are generally equipped with a gas or electric or heat pump booster to ensure you don't run out.
201 trang |
Chia sẻ: maiphuongtt | Lượt xem: 1831 | Lượt tải: 4
Bạn đang xem trước 20 trang tài liệu Solar power hot water systems, để xem tài liệu hoàn chỉnh bạn click vào nút DOWNLOAD ở trên
SOLAR POWER HOT WATER SYSTEMS * Introduction. Why Choose Solar Powered Hot Water ? Applicatons of Solar Powered Hot Water . Solar Powered Hot Water Components . How the System Works ? Solar Tracking. How the Instalation Manual – Operation? References . 0. Overview * Introduction Overview : 1.1 What is a Solar Powered Hot Water ? 1.2 What do you need to know about Solar Hot Water ? 1.3 What Solar Hot Water Systems are Compliant? 1.4 The history of Solar Powered Hot Water. 1.5 How the used of Solar Powered Hot Water ? 1.6 Trends and Improvements of the Solar Powered Hot Water. * Introduction 1.1 What is a Solar Powered Hot Water ? Solar hot water systems consist of solar collector panels on the roof of a building and a storage tank. The sun's rays heat the water much the same as water in a hose left on the lawn on a hot day. Because they only generate hot water when the sun is shining, they are generally equipped with a gas or electric or heat pump booster to ensure you don't run out. * Introduction 1.1 What is a Solar Powered Hot Water ? Heat Pump Booster * Introduction 1.1 What is a Solar Powered Hot Water ? Some systems have the storage tank and the solar collector panels on the roof. However, if you don't like the look of the storage tank on the roof or if your roof can't support the weight - you can choose a pumped system that has only the collector panels on the roof, while the tank is at ground level. * Introduction 1.1 What is a Solar Powered Hot Water ? * Introduction 1.1 What is a Solar Powered Hot Water ? A Solar Hot Water System requires only daylight to generate heat so can still generate hot water on a cloudy day. There are three main components in a Solar Hot Water system for domestic applications: Solar Panels – that collect heat from ambient daylight and transfer it to a solar fluid (a glycol/water solution). Plumbing System – which includes simple piping and a pump, to pump the solar fluid around the system to heat the water. Hot Water Cylinder – which stores the hot water for domestic use. * Introduction 1.1 What is a Solar Powered Hot Water ? Solar Panels * Introduction 1.1 What is a Solar Powered Hot Water ? Plumbing System * Introduction 1.1 What is a Solar Powered Hot Water ? Hot Water Cylinder * Introduction 1.2 What do you need to know about SHW ? Hot water accounts for around a quarter of household energy costs and around 20 per cent of its greenhouse gas emissions. Solar hot water systems use the power of the sun, collected from solar panels mounted on the roof of a house to heat water for use in the bathroom, laundry, kitchen and swimming pool. * Introduction 1.2 What do you need to know about Solar Hot Water ? * Introduction 1.3 What Solar Hot Water Systems are Compliant? Solar hot water systems must achieve a minimum energy performance of 60 per cent solar gain as measured by the Australian Standard for solar hot water systems AS 4234-1994 "Solar water heaters - Domestic and heat pump - Calculation of energy consumption". It is worth looking at the electric and gas-boosted solar water heaters that achieve the performance set down in the standard. * Introduction 1.4 The history of Solar Powered Hot Water? History on the World. In the late 1800’s, the practice of exposing black metal water tanks to the sun was combined with the scientific principle of the hot box, thereby increasing the tanks' ability to collect and retain solar heat. Clarence Kemp patented this method in 1891, and applied its principle as a means of heating water. The result – the Climax – came to be known as the world's first commercial solar water heater. * Introduction 1.4 The history of Solar Powered Hot Water? History on the World. Hot Box * Introduction 1.4 The history of Solar Powered Hot Water? History on the World. Solar hot water systems continued to evolve through the 20th century, and as a result of the Arab oil embargo, tens of thousands of the units were installed during the 1970’s and early 1980’s. While more energy-efficient than solar hot water systems of earlier in the century, they were still crude by modern standards. * Introduction 1.4 The history of Solar Powered Hot Water? History on the World. Today, more efficient solar collectors have been developed, such as evacuated tube collectors, which operate more efficiently in cold weather and at hotter operating temperatures than other types. Even today's flat plate collectors (like the ones used in our solar hot water system) are much more advanced than models from 20-30 years ago. * Introduction 1.4 The history of Solar Powered Hot Water? History in Viet Nam. See the problem a lack of energy in the future will happen. From 1994, the center of energy research by University of Technology Ho Chi Minh City (Solar - BK) has implemented research projects on large wind energy and solar energy. Through many years of study and experience of developing countries, research center has a clean source of energy application to real life. In which Solar Hot Water. * Introduction 1.4 The history of Solar Powered Hot Water? History in Viet Nam. In 2000, a number of products solar energy was the first company to enter Sunpo Vietnam installed to use and practical test. Quan Quan, Co. was officially established in 1991. JSC solar Vietnam - VNSolar (USolar) was established in 2002 * Introduction 1.4 The history of Solar Powered Hot Water? History in Viet Nam. And until now the market Vietnam has many brand names, many companies involved in field research and production facilities using solar energy - the product is Solar Hot Water: Solar - BK, Appllo, Quan Quan, Dai Khang, chromagen Solar, Solar Hart, Heliox Solar, Solar Meru, Sun Flower, Sunpo, Usolar ... * Introduction 1.5 How the used of Solar Powered Hot Water? Domestic solar hot water systems are probably familiar to most readers. They depend on solar collectors typically mounted on the roofs of homes. The solar collectors capture solar energy to heat water for use inside the home. Most domestic solar hot water systems are designed to provide 40 percent to 80 percent of a household’s annual hot water needs, although 100 percent is possible. (This requires using the most efficient solar panels and is typically achieved in the sunniest locations.) * Introduction 1.5 How the used of Solar Powered Hot Water? * Introduction 1.5 How the used of Solar Powered Hot Water? Although this chapter deals with systems for domestic hot water, these systems can also be designed to provide space heat for homes. Solar hot water systems can also be designed to heat greenhouses and swimming pools. They can even provide hot water for hot tubs, saving homeowners tons of money and dramatically reducing the environmental impact of using conventional heat sources. * Introduction 1.6 Trends and Improvements of the Solar Powered Hot Water * Introduction 1.6 Trends and Improvements of the Solar Powered Hot Water ? * 2. Why Choose Solar Powered Hot Water ? Overview : 2.1 Save Money, Energy and Protect Against Rising Energy Costs – Running Costs? 2.2 Solar Water Heating is Green ? 2.3 Solar Water Heating is Reliable 2.4 How to Afford Solar Powered Hot Water? 2.5 More Hot Water … * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? Because domestic hot water is something we use year-round, its production is the number two energy hog in most households, behind only space heating. From the very first day a solar hot water system is installed, you will save money that was previously spent on fossil fuel energy. * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? Canadians: Solar Hot Water accounts for one third of the average residential energy consumption, and a solar system can reduce that cost by 50% - 80%, saving an average of $500 - $1000 a year. * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? Vietnam: Just invest in the type 1 to 180 liters of 5 user. After 2 years and 1 month using your fully recover the capital and 12 years 1 month and then use them for free. Saves you a fee after a free use is 159,000 VND x 145 months = 23,155,000 VND. (Reports of Master. Nguyen Duong Tuan) * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? How do you think of this Slogan by some wesites or some Companies trade Solar Hot Water ? * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? How many dayswill you get FREE ? * 2.1 Save Money, Energy and Protect Against Rising Energy Costs? * 2.2 Solar Water Heating is Green ? * 2.2 Solar Water Heating is Green ? Average to produce 1 kWh of energy in a thermal power machine used materials coal will evacuate 1kg (2.2 pounds) CO2 gas. Burning natural gas and gas to produce electricity or hot water heater will be born 450 grams of CO2 gas per 1 kWh of energy generated. For each individual household to heat hot water for living and the average about 30% of the total amount of CO2 Gas in households created. Through equipment installed hot water heater using solar energy, devices can provide about 80% of energy needs necessary to our hot water heater, we can reduce 25% of the total CO2 Gas. * 2.2 Solar Water Heating is Green ? * 2.2 Solar Water Heating is Green ? There is no bigger long-term question facing the global community than the threat of climate change... Surprising as it may seem, analysts believe that the annual total CO2 produced by residential water heaters throughout North America is roughly equal to that produced by all of the cars and light trucks driving around the continent. Another way of looking at it is: If half of all households used solar water heaters, the reduction in CO2 emissions would be the same as doubling the fuel-efficiency of all cars! * 2.2 Solar Water Heating is Green ? * 2.2 Solar Water Heating is Green ? * 2.2 Solar Water Heating is Green ? Another important advantage of solar water heating is the fact that solar water heating produces no harmful greenhouse gas emissions. No carbon dioxide is ever released into the atmosphere from a zero-carbon solar water heating system which makes it one of the cleanest energy sources available. Installing a solar water heater can reduce harmful carbon dioxide emissions by 250 kg or even more, every year. Solar water heating allows you to contribute to a much safer and healthier environment. * 2.2 Solar Water Heating is Green ? 100% solar electric pumping eliminates the typical 20% environmental penalty associated with using mains electricity to run solar heating pumps and controls. This means it can be classified as a zero-carbon water heating system. SolartWin’s environment-centred “zero carbon” solar water heating system design specifies a solar electric pump. So your CO2 savings won’t retreat two steps after advancing ten. That's one reason why people buy solar products from SolartWin. (And the prices are good!) * 2.2 Solar Water Heating is Green ? To protect the earth from the global warming, we are trying to reduce CO2 by exploiting hydrogen energy and renewable energy like wind power, or Solar Energy which is typical Solar Hot Water. * 2.2 Solar Water Heating is Green ? International cooperation can save the environment of the earth. * 2.3 Solar Water Heating is Reliable You will always have hot water even if the sun is not shining. A solar system uses your conventional water heating system as a backup. You can use solar hot water whether you use electricity, propane, oil, or another fuel to heat your water now * 2.3 Solar Water Heating is Reliable * 2.4 How to Afford SHW ? Using the sun's free energy to heat water helps lower your home energy bills. Water heating is the second highest energy cost in a typical household. In Vermont, a solar system can cut hot water fuel bills by two-thirds or more. Depending on how much hot water you use, and your current water heating fuel, these savings can be hundreds of dollars a year. If you have a swimming pool, solar is the most economical way to heat your pool and extend your swimming season. A solar pool heating system can pay for itself in four years or less. * 2.4 How to Afford SHW ? * 2.5 More Hot Water … Because they often use two hot water tanks, solar hot water systems can increase your household's supply of hot water, providing you with more comfort and longer hot showers. * 3. Applicatons of SHW Overview : Solar energy can heat water for at least four different applications: Potable (drinking) and service use (washing) use in homes - Solar Domestic Hot Water Potable and service use in commercial, and institutional and industrial facilities Radiant Floor Heating (Space Heating) Swimming pools (indoor or outdoor). * Solar Domestic Hot Water (App.) Solar hot water systems are most commonly used to heat water for basic household needs such as laundry, bathing, dishwashing and cooking. These systems are commonly referred to as "domestic hot water systems Domestic hot water systems typically use solar energy to pre-heat the water that is incoming to a conventionally fueled heating tank. * Solar Domestic Hot Water (App.) * Solar Domestic Hot Water (App.) The warmer the water from the solar heater, the less conventional fuel will be needed to provide the household's hot water needs. During the summer months in Vermont, a properly sized solar hot water system will provide almost 100% of a household's needs. In the winter, or during extended cloudy periods, the amount of hot water provided by the sun may be 30% or less. * Solar Domestic Hot Water (App.) Vermont's solar hot water professionals tend to install systems that meet between 60% and 70% of the annual load * Solar Domestic Hot Water (App.) Solar - Bach Khoa Composition :- Average temperature from 45-75oC. - Hot water tanks are insulated by PU Foam thickness from 50mm-55mm. - Tank is made of sus 304 INOX. - Reduce the rate of four after 16h: < 4oC. Collector absorbs plate heat produced by European standards. Thermal Collector with glass cotton. Absorbs plate heat proof, the cancellation, the need. * Solar Domestic Hot Water (App.) Solar - Bach Khoa Composition :- Average temperature from 45-85oC. - Hot water tanks are insulated by PU Foam thickness from 50mm-55mm. - Tank is made of sus 304 INOX. - Reduce the rate of four after 16h: < 4oC. Performance on the 10% higher compared with other types of pipe. - Work well in the cold weather. - Cheaper price than other products. - Minimizing the loss of heat convection * Solar Domestic Hot Water (App.) Solar – Quan Quan Composition :- Average temperature from 60-70oC. Max . 90 oC- Hot water tanks are thickness 50mm.- Tank is made of sus 304 INOX. Collector absorbs plate heat produced by European standards. Thermal Collector with glass cotton. Keep the temperature during 48 hours. In the less sunlight, more rain, the temperature of many of SHW to 40 ° C. * 3.2 Commercial Applications . Commercial facilities with high hot water demands and access to a good southern exposure can be great candidates for solar hot water. Restaurants, Bakeries, Beauty Salons, Health Clubs, and Hotels are all potentially good sites. A Commercial installation generally makes use of the same system design and components as residential systems, including a conventional back-up for hot water heating during high load and low sun periods. Solar hot water professionals can help you determine the applicability of solar for your site. * 3.2 Commercial Applications . * 3.2 Commercial Applications . Industrial system from one system to many of the pair fit together to form the system corresponding to 500 - 1100 - 1500 - 2000Lit or more. Because of limitations in the transport system so each application only to a maximum 5.000Lit, systems connected to the contact information to create a large system needs. Temperature of the system can be designed on request to 80oC. Hotels temperature usually designed around 55-60oC. * 3.2 Commercial Applications . SP.58-1800-xx (5.000L) SP.58-1800 - xx (15.000L) * 3.2 Commercial Applications . SP.58-1800- 900 Tube SP.58-1800-600 Tube * 3.2 Commercial Applications . Very suitable for large hotels, the system for the industry. high economic efficiency. Responding to diverse needs, can be tailored to each specific needs. There are integrated controllers automatically, circulatory pump, the temperature shown on request. Ability and anti-dam or ice rain - d25mm. Ability to power against the wind: 30m / s. Life expectancy 15 years. Can a combination of support to electric, gas, Boiler, Heat Pump or other sources when the weather weak sunny and stable to heat water. * 3.3 Space Heating Overview : Solar water heaters can also be used to provide space heating. The same set of solar collectors can be used to provide hot water for both space heating and space heating needs, although space heating will generally require a much greater collector area and storage capacity. Additional controls and heat exchangers are also needed. Due to these extra costs, and because sunshine is relatively scarce when heating loads are highest (for example at night and during the winter) solar energy is more often used to heat domestic water than it is for space heating * 3.3 Space Heating Overview : * 3.3 Space Heating * 3.3 Space Heating Overview : Cold Water Supply Hot Water to House * 3.4 Swimming Pool Application. Overview : Solar water heaters are often the most economical way to heat a swimming pool. Compared to conventional pool heaters using propane or oil, solar pool heating systems can pay for themselves in four years or less. If you currently don't heat your pool, a solar heating system can provide an economical way to extend your pool season, starting earlier in the spring and extending later into the fall. * 3.4 Swimming Pool Application. * 3.4 Swimming Pool Application. Overview : Solar pool heaters work by circulating pool water directly through collectors and then rerouting the warmed water to the pool. System controllers sense when collectors are warmer than the pool water, and open valves diverting water from the pool circulator through the collectors and then back into the pool. * 3.4 Swimming Pool Application. * 3.4 Swimming Pool Application. Overview : The controller can be set to automatically keep the pool temperature anywhere between 65 and 100 degree Fahrenheit. ~(18 - 38 oC) The collectors used for pool heating systems are often less expensive than those used for domestic hot water systems, providing significant economic advantages. * 4. Solar Powered Hot Water Components Overview : 4.1 Solar Collector. 4.2 Solar Water Tanks. 4.3 Heat Pipe. 4.4 System Controller. 4.5 Electric, Gas, , Heat Pump Boost * 4. Solar Powered Hot Water Components * 4. Solar Powered Hot Water Components * 4. Solar Powered Hot Water Components * 4. Solar Powered Hot Water Components * 4.1 Solar Collector. Overview : * 4.1 Solar Collector. Flat plate solar collectors: The principal component in this type of collector is the absorbed plate, which is usuall y an assembly of copper sheet and copper tubing. The top surface of of the absorber plate is coated with dark colo red paint or electroplated "selective surface" coating that absorbs the vast majority of solar radiation striking it. * 4.1 Solar Collector. Flat plate solar collectors: The instant solar radiation strikes this surface it is converted to thermal energy (heat).The copper sheet acts as a wick to conduct this heat toward the copper tubing that is welded or otherwise bonded to the sheet. Heat moves across the copper sheet toward the tube because the fluid flowing through the tubes is cooler than the absorber sheet. * 4.1 Solar Collector. Flat plate solar collectors: This fluid absorbs the heat and carries it out of the collector. To minimize heat loss, the absorber plate is usually housed in an enclosure made of aluminum and capable of withstanding many