人人人免费人人专区人人-人人人人凹人人爽人人澡-人人人人草-人人人人干-国产三级乡下-国产三级在线

Analysis of the advantages and disadvantages of domestic solar water heater system

2017-12-14 1931

In solar hot water systems, water storage tanks are used to store the heat generated by solar collectors, sometimes referred to as "hot water storage tanks." The use of liquids (especially water) for heat storage is the most advanced and widely used theory and technology in various heat storage methods. In addition to having a larger specific heat capacity, the liquid used is generally expected to have a higher boiling point and a lower vapor pressure. The former is to prevent the aluminum alloy box from being transformed (into a gaseous state) while the latter is to reduce the storage Pressure on the heat container. In low-temperature liquid heat storage medium, water is the best, and therefore the most commonly used one.

Tell you about the advantages and disadvantages of domestic solar hot water system

interest

① physical, chemical and hydrothermal properties are very stable, we know it very well Angie aluminum box is very understanding, the use of technology to the oldest;

② can double as heat storage medium and heat transfer medium, heat storage system can be removed within the heat exchanger;

③ heat transfer and liquid properties are quite good, the common liquid, the largest specific heat capacity, coefficient of thermal expansion of small, small viscosity, it is suitable for natural circulation and forced circulation;

④ liquid - when the balance of gas temperature - pressure contact is very suitable for flat-panel solar collector;

⑤ rich history, low prices.

defect

As an electrolytically corrosive substance, the oxygen that occurs is prone to tarnish the metal and is a solvent with respect to a large number of gases, especially oxygen, so that corrosion of the vessel and piping is minimal;

② coagulation (icing) when the larger volume swelling (up to 10% dominated), easy to damage the containers and pipes;

(3) Above mid-temperature (over 100 ℃), its vapor pressure increases exponentially with the increase of hot water temperature, and heat and water can not be used for heat storage. Temperature and pressure can not exceed its critical point (373.0 ℃, 2.2 × 10Pa) , Such as the cost, the cost of heat storage temperature of 300 ℃ than when the heat storage temperature is 200 ℃ when the cost is 2.75 times higher.

The use of water as a heat storage medium, you can use stainless steel, enamel, plastic, aluminum, copper, iron, reinforced concrete, wood and other materials for heat storage containers, the shape can be cylindrical, box and sphere, Care should be taken for the corrosion resistance and durability of the materials used. For example, the choice of cement and wood as a heat storage container material, we must think about its thermal expansion, to prevent leakage due to long-term use of cracks.

Hot water storage tank Hot water storage tank is a storage of both heat and cold storage equipment. It was developed as a component in systems for supplying hot water, heating and air conditioning to buildings, primarily to dispatch the imbalance between power and energy so as to advance the heat utilization of the system and to meet the heat load The demand.

Due to the exothermic nature of the hot water storage tank (complete extrusion flow, complete mixing flow and some mixed flow), pressure conditions (open and closed), the number of tanks (single and multi-tank) Or vertical and horizontal or horizontal), structural materials and uses are not the same, can be divided into a variety of different types. The following only the first two points to introduce.

主站蜘蛛池模板: 8888四色奇米在线观看免费看| 久久免费视频一区| 日本三级中文字版电影| 被公侵犯肉体的中文字幕| 国产一区二区三区视频| 三上悠亚在线电影| 任我爽在线| 91传媒蜜桃香蕉在线观看| 波多野结衣被绝伦在线观看| 日韩黄色大全| 国产剧情精品在线观看| 四虎永久免费观看| 女神校花乳环调教| 国产极品视觉盛宴| 久久综合九色综合97欧美| 小草视频免费观看| 天天5g影院永久免费地址| www.插插| 亚洲国产欧洲综合997久久| 国产福利午夜| 在线播放真实国产乱子伦| 一级黄色欧美| 色妹子在线| 好男人好视频手机在线 | 好湿好大硬得深一点动态图| 悠悠在线观看精品视频| 天天想你在线视频免费观看| aaa一级黄色片| 亚洲综合无码一区二区| 两个人看的www视频日本| 91久久麻豆| 国产国产人免费人成免费视频| 吃奶摸下激烈免费视频免费| 毛片免费试看| 美女扒开内裤羞羞网站| 国产又长又粗又爽免费视频| 久久青草国产精品一区| 你是我的城池营垒免费观看完整版| 免费在线观看国产| 樱花草在线社区www| 老司机带带我在线精彩免费|