An air-source heat pump (ASHP) is a type of all-in-one heat pump that absorbs heat from a colder place and releases it into a warmer place using the same vapor-compression refrigeration process and same external heat exchanger with a fan as used by air conditioners. Unlike an air conditioning unit, however, it is able to both warm and cool buildings and, in some cases, also provide domestic hot water. Then, let’s introduce in detail what are the specific functions of ASHP?
Here is the content list:
What is the operation principle of ASHP?
How does ASHP work in extreme cold conditions?
What is the service life of ASHP?
Air at any temperature above absolute zero contains some energy. An air-source heat pump is a kind of all-in-one heat pump that transfers some of this energy as heat from one place to another, for example between the outside and inside of a building. This can provide space heating and hot water. A single system can be designed to transfer heat in either direction, to heat or cool the interior of the building in winter and summer respectively. For simplicity, the description below focuses on use for interior heating.
The technology is similar to a refrigerator or freezer or air conditioning unit: the different effect is due to the physical location of the different system components. Just as the pipes on the back of a refrigerator become warm as the interior cools, so an ASHP warms the inside of a building whilst cooling the outside air.
The main components of an air source heat pump are:
1. An outdoor heat exchanger coil, which transfer extracts heat from ambient air
2. An indoor heat exchanger coil, which transfers the heat into hot air ducts, an indoor heating system such as water-filled radiators or underfloor circuits, and a domestic hot water tank.
Air source heat pumps can provide fairly low-cost space heating. The high-efficiency heat pump can provide up to four times as much heat as an electric resistance heater using the same amount of electricity. The lifetime cost of an air source heat pump will be affected by the price of electricity compared to gas (where available). Burning gas or oil will emit carbon dioxide and also nitrogen dioxide, which can be harmful to health. An air-source heat pump issues no carbon dioxide, nitrogen oxide, or any other kind of gas. It uses a small amount of electricity to transfer a large amount of heat: the electricity may be from a renewable source, or it may be generated from power stations that burn fossil fuel.
An air-source heat pump designed specifically for very cold climates can extract useful heat from ambient air as cold −30 °C (−22 °F). Manufacturers include Mitsubishi and Fujitsu. One Mitsubishi model provides heat at −35 °C, but the coefficient of performance (COP) drops to 0.9, indicating that resistance heating would be more efficient at that temperature. At −30 °C, the COP is 1.1, according to the manufacturer's data (the manufacturer's marketing literature also claims a minimum COP of 1.4 and performance to −30 °C). Although air-source heat pumps are less efficient than well-installed ground source heat pumps in cold conditions, air-source heat pumps have lower initial costs and may be the most economic or practical choice.
A study by Natural Resources Canada found that cold climate air-source heat pumps (CC-ASHPs) work in Canadian winters, based on testing in Ottawa (Ontario) in late December 2012 to early January 2013 using a ducted CC-ASHP. (The report does not explicitly state whether backup heat sources should be considered for temperatures below −30 °C. The record low for Ottawa is −36 °C.) The CC-ASHP provided 60% energy savings compared to natural gas (in energy units). When considering energy efficiency in electricity generation, however, more energy would be used with the CC-ASHP, relative to natural gas heating, in provinces or territories (Alberta, Nova Scotia, and the Northwest Territories) where coal-fired generation was the predominant method of electricity generation. (The energy savings in Saskatchewan were marginal. Other provinces use primarily hydroelectric and/or nuclear generation.) Despite the significant energy savings relative to gas in provinces not relying primarily on coal, the higher cost of electricity relative to natural gas (using 2012 retail prices in Ottawa, Ontario) made natural gas the less expensive energy source. (The report did not calculate the cost of operation in the province of Quebec, which has lower electricity rates, nor did it show the impact of time of use electricity rates.) The study found that in Ottawa a CC-ASHP cost 124% more to operate than the natural gas system. However, in areas where natural gas is not available to homeowners, 59% of energy cost savings can be realized relative to heating with fuel oil. The report noted that about 1 million residences in Canada (8%) are still heated with fuel oil. The report shows 54% energy cost savings for CC-ASHPs relative to electric baseboard resistance heating. Based on these savings, the report showed a five-year payback for converting from either fuel oil or electric baseboard resistance heating to a CC-ASHP.
Air source heat pumps can last for over 20 years with low maintenance requirements. There are numerous heat pumps from the 1970s and 1980s in the United States that are still in service in 2012even in places where winters are extremely cold. Few moving parts reduce maintenance requirements. However, the outdoor heat exchanger and fan must be kept free from leaves and debris. Heat pumps have more moving parts than an equivalent electric resistance heater or fuel burning heater. Ground source heat pumps have fewer moving parts than air source heat pumps as they do not need fans or defrosting mechanisms and are located indoors. The ground array for a ground source installation should last for over 100 years.
Air source heat pump is our life simpler and more convenient, has become an indispensable electrical appliance in our life. Its widespread use has helped many people in extreme weather. It not only regulates temperature but also provides hot water, making it a better presence than air conditioning. If you are in all-in-one heat pump and air source heat pumps business, you can consider our cost-effective products.
Dec.6th, 2010, 154,000 square meters production base in Luoyang city was put in production. The capacity is 1,000,000 solar water heaters per year, which opened a new era of the integration and layout of solar energy industry.
In recent years, as the country vigorously promotes clean energy, a new type of safe, environmentally friendly, energy-saving, and comfortable air heat pump hot water method has emerged at the right time and has become the first choice for many families. For everyone to have a more comprehensive understanding of the air source heat pump hot water system，the following will introduce the heating principle of the air source heat pump in detail, and I hope it will be helpful to you.
Here is the content list:
1.What is the working principle of the air source heat pump hot water system?
2.What are the advantages of air source heat pump hot water (heater) units compared with solar water heaters?
3.What are the characteristics of domestic air source heat pump water heaters?
The air source heat pump hot water unit consists of a compressor-condenser-throttle-evaporator-compression mechanism into a circulatory system. The heat medium (also called refrigerant) circulates in the system under the action of the air source heat pump. It completes the gaseous pressure increase and temperature rise process in the compressor (the temperature is as high as 80-100°C). After entering the condenser, it releases high-temperature heat to heat the water, and at the same time, it is cooled and transformed into a liquid state. When it runs to the evaporator, the liquid will quickly endothermic and evaporate and transform into a gaseous state again, while the temperature drops to minus 20°C-30°C. At this time, the air around the evaporator will continuously transfer low-temperature heat to the heat medium. The continuous circulation of the heat medium realizes the process of converting the low-temperature heat in the air into high-temperature heat and heating the cold water.
(1) Good power-saving effect: air source heat pump water heaters can save 65-80℅ on average, and electric-assisted solar water heaters can save 40-65℅ on average, and can only reach 70℅ under special conditions.
(2) Small investment: Taking electricity-saving 65℅ as the standard, the investment of air source heat pump hot water unit is only about 70℅ of the electric-assisted solar water heater.
(3) The storage tank is small: the storage tank of the solar water heater should be configured according to the maximum hot water supply throughout the day, and the air source heat pump hot water unit can produce hot water at any time, so the storage tank of the air source heat pump is only configured for the maximum supply. 50~70℅ of the amount of hot water can meet the requirements.
(4) Small footprint: solar water heaters often occupy the entire floor area, and the floor area is not large enough for users above 9 floors. The air source heat pump hot water unit system only needs 1/9 of the area occupied by the solar hot water unit. (The domestic air source heat pump hot water unit can be installed on the balcony or garage, and it hardly occupies the effective building area.)
There are many models of air source heat pump water heaters for domestic use. It is a new type of high-efficiency, safe, environmentally friendly, and superior home central water heater designed for medium and high-quality families. Its main features are:
(1) Split design: the installation of a household air source heat pump water heater is very convenient.
(2) Microcomputer control: The domestic air source heat pump water heater realizes fully automated operation.
(3) Pressure-bearing water tank design: domestic air source heat pump water heater has sufficient water pressure, and the pressure of cold and hot water is automatically balanced.
The above is all about the air source heat pump hot water system. If you want a steady supply of hot water at a lower price, you might as well install a household air source heat pump water heater in your home. First of all, you should choose a good air source heat pump, you can consider using MICOE's cost-effective products.
Visit www.micoe.com to get more information.
It’s The First Trip Stop on The Ancient City of Xi ‘an Nationwide tour.
The ancient capital of Xi’an city is still full of passion and vitality after going through millennium wind-rain. Here you can find history, economy, humanity, science and technology and so on.
A group of experts came into the ancient city of Xi ‘an from national top space industry on August 14. 2013. It played the sinfonia of 2013 Micoe cup “Aerospace Science Lecture Hall” Series Activity by nationwide tour in the Shaanxi Science and Technology Museum.
2013 Micoe cup “Aerospace Science Lecture Hall” activity which is jointly guided by China Association for Science and Technology, China’s Manned Aerospace Engineering Office and the China Aerospace Science and Technology Group co., LTD. . This activities of Xi ‘an station had a lot of support from Shaanxi Province Association for Science and Technology, Shaanxi Science and Technology Museum and Xi ‘an aerospace unit.
( 2013 Micoe Cup “Space Science Lecture Hall” the activities live in Xi ‘an Station )
Micoe cup “Aerospace Science lecture hall”activities aimed at popularizing public space for teenagers as important content. The lecturers’ group of activities is composed of the following: specially recruited space experts, the astronauts, space university professors and prominent space journalists etc. Another personages with more years working experiences are attracted to do the best of themselves to popularize public space for teenagers at the same time.
The China Aerospace Science and Technology Group co., LTD’s science adviser, Chinese Academy of Engineering Guitian Zhang , vice minister of Aerospace Propulsion Technology Research Institute quality and technical department Songlin Tan , member of standing committee of Science and Technology and Aerospace Power Technology Research Institute, deputy director of the original Committee of Science and Technology ChongZhi Ruan , deputy chief engineer of China Academy of Space Technology, Xi ‘an branch Zhengjun Li four space experts and the Micoe Shaanxi sales minister Jisong Xu hired out as the second batch members (Shaanxi area) of “Aerospace science lecture lecturer”” in the first lecture of the national speaking tour.
( Five experts were hired as “Aerospace science lecture lecturer” the second batch members (Shaanxi area) )
The academician of Chinese Academy of Engineering, the rocket engine expert Guitian Zhang , former dean of Aerospace Power Technology Institute Chongzhi Ruan , the former battalion chief of astronaut brigade Hangyun Shen taught “The celestial arrows – reading space launch vehicle” for more then two hundred teenagers at the scene. It had a right royal welcome from the children.
Xi ‘an station is the the first lecture of “space science lecture hall” series of activities national tour. Qianjin Wang, vice President of Shaanxi provincial Association for Science and Technology showed great welcome. He pointed out that Shaanxi is a big province of science, technology and industry for National Defense in China, known as China’s reputation as “ China Space Power Town” . This “space science lecture hall” insert flags on the wider Shaanxi and arouse youth people to love space, respect science, explore the unknown passion and dream again.
(The academician of Chinese Academy of Engineering, the rocket engine expert Guitian Zhang , former director of Aerospace Power Technology Research Institute Chongzhi Ruan , former captains of astronaut brigade Hangyun Shen taught space knowledge for children)
Aerospace Power Technology Research Institute Chongzhi Ruan , former captains of astronaut brigade Hangyun Shen taught space knowledge for children)
In 2007, Micoe became one partner of China’s aerospace industry in solar energy sector.Micoe take the spirits of aerospace and cast the quality of aerospace , launch with aerospace double thermal technology: “aerospace tube”, “adiabatic tank”.in business development process. Micoe has been actively exploring the application of space technology for civil use.In 2011, Micoe developed exquisite diamond aerospace pipe “,its lifetime can be 25 years. Micoe hopes to reduce the distance between aerospace and people through practice and exploration. Introduce high-end space technology into products and Bring visible and available high-tech products and most incredible experience for consumers .
Micoe Shanxi sales minister Jisong Xu said: “space science lecture hall activities have increased one’s knowledge of China aerospace and roused the initiative of the entire society. Hope to create a beautiful future by the activities attracting more social forces to support aerospace and public welfare. ”
( Micoe Shaanxi sales minister Jisong Xu introduced Micoe aerospace civilian technological achievements. )
Micoe combined “Sunshine Student Grant ” public welfare activities as the feature of xi ‘an station in 2013 Micoe cup “Aerospace Science Lecture Hall” and funded two students that Hefei Fan who had been admitted to the Chinese People’s university and Fangjuan Zhang Xi ‘an Petroleum University. “Sunshine student grant” activity is Micoe’s public educational activities lasted for many years. Micoe has taken timely “blood transfusion” and long-lasting “hematopoiesis” as an integrated new public welfare mode to introduce the activities Since 2010. It combines with work-study programme and tuition funding for many poor college students. This not only contained the educational philosophy for “Give a man a fish and you feed them for a day. Teach them how to fish and you feed them for a lifetime.” and formed a set of practical, long-term, professional, timely public welfare system. It make them more richly in meanings and more wider in ranges.
( Three aerospace experts grant scholarships for two students . )
2013 Micoe cup “aerospace science lecture hall” series of activities had started on June 21, in China Science and Technology Museum . Space hero Liwei Yang and the Shenzhou spacecraft’s chief designer Faren Qi as representatives of more than 30 academicians and aerospace experts will develop tour activities one after another throughout the country. “Aerospace Science Lecture Hall” will also begin in Shanghai, Lianyungang, Luoyang in succession after Xi ‘an.
( Micoe staffs introduces Micoe space civilian technological achievements to experts. )
(notes: 2013 Micoe cup “Aerospace Science Lecture Hall” series of activities has been carried out across the country, the public can login through tencent official website http://news.qq.com/zt2013/tksk/index.htm, China’s space network query activities related contents.)