某太阳能热水器的有效采光面积为3m2,能在8 h内将225L水的温度升高40℃.设太阳能热水器有经济、安全、卫生、环保等优点,某太阳能热水器的集热器的有效采光面积为3M2,能在8H内将225L水的温度

某太阳能热水器的有效采光面积为3m2,能在8 h内将225L水的温度升高40℃.设太阳能热水器有经济、安全、卫生、环保等优点,某太阳能热水器的集热器的有效采光面积为3M2,能在8H内将225L水的温度
某太阳能热水器的有效采光面积为3m2,能在8 h内将225L水的温度升高40℃.设
太阳能热水器有经济、安全、卫生、环保等优点,某太阳能热水器的集热器的有效采光面积为3M2,能在8H内将225L水的温度升高40 .设热水器每平方米面积每秒接受太阳辐射能为1.4X10的3次方J.该太阳能热水器的效率是多大太阳能热水器

某太阳能热水器的有效采光面积为3m2,能在8 h内将225L水的温度升高40℃.设太阳能热水器有经济、安全、卫生、环保等优点,某太阳能热水器的集热器的有效采光面积为3M2,能在8H内将225L水的温度
吸收的热量：3.2*1.4*8*3600=16128KJ
热水升高温度消耗的热量：225*40*1=9000KJ
效率为：9000/16128=55.8%

Beijing July 10,nike air max nm, NBA is in the offseason, the following are important and team related news:
Ginobili look forward to an early end to stop
Spurs star Manu - Manu Ginobili...

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Beijing July 10,nike air max nm, NBA is in the offseason, the following are important and team related news:
Ginobili look forward to an early end to stop
Spurs star Manu - Manu Ginobili has expressed his views on the shut down, he said: "Now the situation is very complex differences between the two sides are still great, and we obviously want to play, hope to continue to do all these years to do, but They want to change the salary cap, contract length and other requirements. but they made conditions far beyond the level acceptable to us now also great differences between the two sides. the next few weeks seems to be further a meeting, the differences may be narrowing a bit, but I find it difficult to reach an agreement in a short time. differences were too great, and there are many issues to negotiate,nike air griffey max one, we want to reach an agreement as soon as possible, so that the season can begin as scheduled, because the drag longer, harder training,ken griffey jr shoes, the more difficult to stay in shape, will hurt the mood of the fans,jordan high heels, everyone will suffer. "
Artest cold of New York
Artest Lakers Manchester recently received a home media,ken griffey shoes, "New York Times" interview, when asked whether the effect is willing to return home, he said: "Perhaps the last paragraph in my career would go, but that dream has long been gone,women griffey shoes, I think . "sounds like he is still on when the Knicks selected him in the NBA draft did not matter to heart. When asked who is the most NBA players will be funny when he said: "The league will be the most funny guy is Lamar - Lamar Odom,ken griffey shoes, he can go as an actor, but some people will never know."
Battier favor CBA
Deron Williams - Williams went to Turkey to play to lead the NBA players to go overseas to play in the shut down period of the wave. Former Rockets player Shane - Shane Battier have expressed their views,dunk heels, he said; "If I go to other places to play, I will first consider China, where I have some relationship depends crucially on the progress of labor negotiations , provided that stalled last a whole season. "Battier think there will be more players to follow DeLong:" He seized that opportunity, and Im proud of him. For him, that would be a good experience If there are more people to follow him,air griffey max gd 2, I would not be surprised,air griffey max 1 Fresh water, but if someone went there in August to participate in training camp, I would be surprised if we do not have to participate in preseason warm-up match and then you will see to have a lot of guys go to Europe. "
Knicks Titans not learn Delong
Knicks starting shooting guard Fields has recently been training hard game in Los Angeles, he was a name under the guidance of personal trainer training, occasionally playing baseball. As for the shut down during the wave of NBA players to Europe, he did not intend to follow suit. He said: "I am all the offseason attention on how to survive in the NBA on this issue, I will observe the other players to see how successful they are, this is a business,griffeys shoes, you are here today, Maybe tomorrow you will go to other places, I only have self-knowledge, the ability to know their location,griffey sneakers, and implement everything,nike air diamond turf, with the confidence to lay the season. "
Gay considering going overseas to play
Grizzlies general Rudy - Rudy Gay is in the period recuperate, if shut down until February next year, he would consider going overseas to play it? Guy replied; "For me, not to say, because I still sidelined with injuries, so I will not go overseas at this stage, anything can happen but I do not mind to play overseas. Downtime situation a little bit crazy. Of course,jordan boots, we are athletes,ken griffey jr sneakers, we have time to decide the next step and I think nothing bad to play overseas and I do not mind. "
(Sohu sports Liqing)

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水温升得到的热能为Q1＝CM△T＝4200×225×40=37800000J
集热器得到的太阳热能为Q2＝1.4×10↑3×8×3600=40320000J
太阳能热水器的效率＝Q1/Q2=0.9375

您给的数据不全面： 管路及贮水箱热损失数据，当地的太阳能保证率等数据没有。
楼主提供的：“每平方米面积每秒接受太阳辐射能为1.4X10的3次方J”不知道从哪里得来？现在国家公布的数据最多详细到“每天月平均接受辐照量多少”例如河南地区：年平均日太阳辐照量：水平面13.482 MJ∕㎡，34°43′倾角表面14.301 MJ∕㎡
我大胆假设下：楼主提供：△T=40℃； 太阳能保证率，...

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您给的数据不全面： 管路及贮水箱热损失数据，当地的太阳能保证率等数据没有。
楼主提供的：“每平方米面积每秒接受太阳辐射能为1.4X10的3次方J”不知道从哪里得来？现在国家公布的数据最多详细到“每天月平均接受辐照量多少”例如河南地区：年平均日太阳辐照量：水平面13.482 MJ∕㎡，34°43′倾角表面14.301 MJ∕㎡
我大胆假设下：楼主提供：△T=40℃； 太阳能保证率，无纲量取0.5；系统热损失率，无纲量取0.2；当地集热器总面积上的年平均日辐照量，14301KJ∕㎡；集热器采光面积3M2 ；产水量225L
通过公式： AC = QwCw（ tend－tL）f / JTηcd（1－ηL） 可计算的，集热器效率为0.549
其实楼主不用计算这个，集热器年或月平均即热效率根据经验可取0.25—0.5之间，由于这些年真空管技术的不断发展效率大多在0.5—0.6之间。

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