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: 日韩欧美91| 奇米网奇米色| 美国式禁忌3| 精品在线一区二区| 妞干网手机视频| 再深点灬舒服灬太大了老板| 国产午夜爽爽窝窝在线观看| 99久久精品免费看国产| 美女免费视频一区二区三区| 国产嫩草影院精品免费网址| 女人被躁免费视频| 妇色妇荡| 在线看福利影| 国产视频综合| 操校花| 法国性经典xxxxhd| 无码精品日韩中文字幕| 玉蒲团3d| 亚洲无人区视频大全| 69精品久久久久| 精品久久久久国产免费| 亚洲国产三级在线观看| 国产捆绑调教| 激情小说第一页| 国产精品美女久久久久| 啊灬啊灬啊灬快灬深一| 色丁香婷婷| 日本三级不卡视频| heyzo小向美奈子在线| 美国式禁忌5太大了| 久久中文字幕一区二区| 顶级欧美色妇xxxxx| 经典三级完整版电影在线观看 | 亚洲视频手机在线| 欧美a级完整在线观看| 国产一级做a爰片在线| 全日本爽视频在线| t66y最新地址一地址二地址三| 好男人什么影院| 男女无遮挡高清性视频直播| 蜜汁肉桃h全篇|