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旧 Oct 28th, 2005, 23:23   只看该作者   #21
heatcool
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默认 有个问题困扰我



你这么一改,客观上使暖炉变得oversize了。
你只控制供风量,却不考虑控制暖炉输出的热量。这样会导致暖炉起停次数大大增加(估计超过一倍以上),你知道现在的设备大多是按照无故障启动运行多少次设计的,这样,就等于缩短了暖炉内部件的使用寿命。经济方面未必会有多少节省。另外,这种情况下对湿度的控制也成问题。

解决这个问题我想可以采用多级(Multi-stage)gas valve,配合variable speed blower。你是控制方面的专家,搞一块板子控制相应的配合应该是不难的。这样的现成的暖炉我只听说过。

当然,舒适性肯定大大提高个,起码各个区可以设定不同的温度,满足不同人的不同的舒适要求。

人间,尽在我心
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旧 Oct 29th, 2005, 00:50   只看该作者   #22
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Talking

前面说了不想在这上解释太多,看来是不行啊,
对流是个度的问题,没有的话,温度扩散不均匀,空气温度提升慢,适当的对流是这种模式的基础之一,你和PLUMBER提的都是这个,关了门并不好,有对流反而好,但不能过多,其实换气次数并不是想的那样,一开门风就呼呼的刮出去了,搞的屋里象刮台风,因为其他UNOCCUPIED AREA并不是没有温度控制,对流出去的也是WARM了其他的AREA,来MAINTAIN UNOCCUPIED SETPOINT,俗点的说法就是肥水没流到外人田里
如果按老中的用法,估计要慢点,但应该在2年就回来了,你是卖房子的,应该知道有ZONE CONTROL的房子要贵些,而且从美国看来,越来越多的人会看买的房子有没有ZONE CONTROL了,这套系统是COMFORT第一,另外的是其他附加的好处了,
按老外的用法,现在ESTIMATE来看,在一年到一年半就肯定收回投资了,还不算房子本身的升值

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作者: fishlonely
主意不错,看出来也确实下了工夫,好。
另外,一定可以省点utility的,但我觉得要比较一下投入和产出,看看值不值的,毕竟这里的房子,对流还是挡不住的。
如果说是爱好,那就没什么可说的了,有钱难买喜欢不是。
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旧 Oct 29th, 2005, 01:10   只看该作者   #23
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Talking

这种系统的模型计算时是会选小一些的FURNANCE, 但没小多少,打了个系数而以,对单个UNOCCUPIED AREA来说,并没有增加热量的损失,类似于整个HOUSE调到了65度的情况,对OCC AREA说,只是在72度的情况下增加了2个面的对65度环境的散热,实际情况也证实了,现在平均启动频率是几乎一样的,区别是RUN TIME缩短了很多,对单一AREA的WARMUP不会超过10分钟,另一个是FAN本身是可以稍微微调的,就等于换了个风量小点的FAN,GAS VALVE也是可调的,就不会OVERSIZE多少,不过我觉得没必要去做这些
湿度没有问题,因为还是WHOLE HOUSE RETURN AIR,而且和上面讲的一样,不是没对流,而且因为每个AREA的温度都平衡了,消除了房子里由于温度不一样造成的结露长MOLD的情况
再往上做,就OVERKILL了,家里不是COMMERCIAL的情况,VFD加进去,我觉得就过度了,再往上BUILD,到LAB的级别都可以,没必要了,总不成搞的可以到我家来做药剂实验吧
引用:
作者: heatcool


你这么一改,客观上使暖炉变得oversize了。
你只控制供风量,却不考虑控制暖炉输出的热量。这样会导致暖炉起停次数大大增加(估计超过一倍以上),你知道现在的设备大多是按照无故障启动运行多少次设计的,这样,就等于缩短了暖炉内部件的使用寿命。经济方面未必会有多少节省。另外,这种情况下对湿度的控制也成问题。

解决这个问题我想可以采用多级(Multi-stage)gas valve,配合variable speed blower。你是控制方面的专家,搞一块板子控制相应的配合应该是不难的。这样的现成的暖炉我只听说过。

当然,舒适性肯定大大提高个,起码各个区可以设定不同的温度,满足不同人的不同的舒适要求。
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旧 Oct 29th, 2005, 07:00   只看该作者   #24
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默认

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作者: Mississauga市政府
论坛藏龙卧虎,高人呀!
主要是加拿大培养人才啊!

在中国,哪有人自己盖房子搞这些的啊!

俺:乔峰般沧桑,段誉般飘逸,狄云般朴实,令狐冲般不羁,韦小宝般多情……
她:燕子般清纯智慧、水晶般温柔贤惠、无痕般涵养多思、叮叮般天真可爱、细雨般善良文静……
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旧 Oct 29th, 2005, 08:45   只看该作者   #25
heatcool
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Thumbs up 不过

引用:
作者: baozi
这种系统的模型计算时是会选小一些的FURNANCE, 但没小多少,打了个系数而以,对单个UNOCCUPIED AREA来说,并没有增加热量的损失,类似于整个HOUSE调到了65度的情况,对OCC AREA说,只是在72度的情况下增加了2个面的对65度环境的散热,实际情况也证实了,现在平均启动频率是几乎一样的,区别是RUN TIME缩短了很多,对单一AREA的WARMUP不会超过10分钟,另一个是FAN本身是可以稍微微调的,就等于换了个风量小点的FAN,GAS VALVE也是可调的,就不会OVERSIZE多少,不过我觉得没必要去做这些

湿度没有问题,因为还是WHOLE HOUSE RETURN AIR,而且和上面讲的一样,不是没对流,而且因为每个AREA的温度都平衡了,消除了房子里由于温度不一样造成的结露长MOLD的情况
我觉得你最好还是调一下fan和gas valve的好,根据离心式风机的特性,阻力增加时流量减小,如果燃烧器仍按原输出量燃烧,将导致换热器过热,10分钟的时间足够触发高温保护,长此以往,High limit很快会烧掉。

还有,正因为是whole house return air,而且通风次数少了(run time减少了),所以湿度控制才成了问题。

不是较真,只是想参与讨论增长知识而已。
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旧 Oct 29th, 2005, 12:30   只看该作者   #26
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Talking

过虑了,再讲下去就真开课了,而且搞的我好象在推销
有点象当时HIGH EFF FURNANCE刚出来一样,如果还是使用GAS,从改善燃烧上已经到了头了,再往下成本提高的太大了,而提高能效的要求越来越高,这些都是新的方法,过5年你再看,到时候估计人人都会理解这个了,象现在人人都觉得高效炉好一样

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作者: heatcool
我觉得你最好还是调一下fan和gas valve的好,根据离心式风机的特性,阻力增加时流量减小,如果燃烧器仍按原输出量燃烧,将导致换热器过热,10分钟的时间足够触发高温保护,长此以往,High limit很快会烧掉。

还有,正因为是whole house return air,而且通风次数少了(run time减少了),所以湿度控制才成了问题。

不是较真,只是想参与讨论增长知识而已。
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旧 Oct 29th, 2005, 16:40   只看该作者   #27
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默认

据我所知,alberta那边好多新房子在推广你所作的系统,好像有个专门的系统,哪个品牌我记不清了,好像是Johnson。就是在风管上加个电动damper。

我只是一直有以上的那些疑虑,看到你在做了,想和你讨论一下。
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旧 Oct 29th, 2005, 20:31   只看该作者   #28
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Talking

以后有机会在下面讨论吧,这里就算了,浪费华枫的资源
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作者: heatcool
据我所知,alberta那边好多新房子在推广你所作的系统,好像有个专门的系统,哪个品牌我记不清了,好像是Johnson。就是在风管上加个电动damper。

我只是一直有以上的那些疑虑,看到你在做了,想和你讨论一下。
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旧 Oct 29th, 2005, 21:56   只看该作者   #29
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默认

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作者: baozi
惭愧,俺是做工程的,只是用,以前曾经想找做硬件的人搞一套出来,可惜做硬件开发的都是大拿级的人物,没人对这感兴趣
现在还只是个开始把,以后还想加HEAT RECOVER UNIT,HUMIDITY CONTROL,包括加湿和除湿,室外温湿度对市内的RESET,利用费热对GARAGE的HEAT,ETC
这一点系统我来到加拿大看到这里的房子后就有这个想法,可惜没有行动.这点还是佩服你啊.
我是搞控制系统的,原来我的构思是:每个zone 的 thermostat 跟 Main Zone controller 是用 wireless network 连接.这样就省了拉线,新旧房子都没问题. 这个技术上是不难实现的.我看你的zone controller 用了一块电路板还有一些Relay, 个人认为用一个micro PLC 就可以搞定. PLC 10点继电器输出的价格<800RMB,而且维护接线都很方便.
以上是我的一点想法
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旧 Oct 29th, 2005, 21:58   只看该作者   #30
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默认

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作者: baozi
从ESTIMATE的角度上讲,一个好的THERMOSTAT可以比一般的节约最高30%的COST,这套系统应该在此基础上有更好的表现,因为不止是从GAS的COST,FAN本身也可以有节约,我下一步就是调一下FAN
包子能谈一谈FAN如何调吗?多谢!
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旧 Oct 29th, 2005, 22:05   只看该作者   #31
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Talking

需要个搞硬件的DX,这个系统简单,但没有专门针对家用的,所以现有的都有些需要改的地方,WIRELESS的可以对旧房,WIRED对新房,虽说技术上不难实现,但对我来说就难了,因为我是硬件外行

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作者: superobot
这一点系统我来到加拿大看到这里的房子后就有这个想法,可惜没有行动.这点还是佩服你啊.
我是搞控制系统的,原来我的构思是:每个zone 的 thermostat 跟 Main Zone controller 是用 wireless network 连接.这样就省了拉线,新旧房子都没问题. 这个技术上是不难实现的.我看你的zone controller 用了一块电路板还有一些Relay, 个人认为用一个micro PLC 就可以搞定. PLC 10点继电器输出的价格<800RMB,而且维护接线都很方便.
以上是我的一点想法
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旧 Oct 29th, 2005, 22:07   只看该作者   #32
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Talking

啥意思?我觉得除了象我这样的吃饱了撑的的主才会想去调那东西,你调FAN干吗?

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作者: old p
包子能谈一谈FAN如何调吗?多谢!
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旧 Oct 29th, 2005, 23:51   只看该作者   #33
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默认

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作者: baozi
啥意思?我觉得除了象我这样的吃饱了撑的的主才会想去调那东西,你调FAN干吗?
请教一下也就是想自己吃饱了的时候动一动。我懂一点硬件。
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旧 Nov 5th, 2005, 21:43   只看该作者   #34
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默认

坛子里多一些类似的技术讨论很好
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旧 Nov 9th, 2005, 21:10   只看该作者   #35
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默认

很专业的设计。请问你的furnace启停是主控板靠什么基准来控制的?是由每个zone温度来决定的吗?比如,某个zone温度低于设定温度时就启动furnace,还是更智能一些。

巧者劳而智者忧,无能者无所求
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旧 Nov 9th, 2005, 22:32   只看该作者   #36
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Talking

我现在就是用的ZONE温度来启动,用DEADBAND,加上点MIN ON/OFF的保护,因为用的是COMMERCIAL的板,其实可以做更多,加PID等等,但给家里来说我觉得已经够了
这里也说一下价格,回答前面的问题,今天上班的时候看了一下市场上已经有的产品,其实控制系统本身不贵,还带FURNACE DISCHARGE AIR TEMP SENSOR等,3个ZONE的要$450左右,但执行DAMPER贵,一般家里需要6个左右(地下室一个,一楼一般2个,2楼3个),每个DAMPER都要$120多,算下来对新房就合适一些,新房加个OPTION都会加几千刀,相比下来就不算贵
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作者: solaris
很专业的设计。请问你的furnace启停是主控板靠什么基准来控制的?是由每个zone温度来决定的吗?比如,某个zone温度低于设定温度时就启动furnace,还是更智能一些。
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旧 Dec 1st, 2005, 16:08   只看该作者   #37
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默认

能不能给点你使用的控制板的资料,或者提供个网址?

多谢!
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旧 Jan 27th, 2006, 18:47   只看该作者   #38
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默认

baozi, 给大家汇报一下几个月用下来的结果吧。很想知道使用效果。

另外,有没有人知道这里便宜点的无线控制器的资料?俺见过有无线开关,一个遥控可以控制多个开关,可能可以改了来用,不知有没有更好解决方案?
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旧 Jan 29th, 2006, 11:17   只看该作者   #39
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Talking

actually only 2 months data compared to last year, almost same, need to see this month's bill
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作者: solaris
baozi, 给大家汇报一下几个月用下来的结果吧。很想知道使用效果。

另外,有没有人知道这里便宜点的无线控制器的资料?俺见过有无线开关,一个遥控可以控制多个开关,可能可以改了来用,不知有没有更好解决方案?
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旧 Apr 29th, 2006, 23:35   只看该作者   #40
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作者: baozi
在家里改造了FURNANCE系统,总共分了7个区,可以进行分区的TEMPERATURE CONTROL,每个ZONE都有自己的设定温度,可以调节,这样一来就可以看电视的时候,只把FAMILY ROOM设在72,而其他ROOM保持在65,而到地下室的时候,才把温度提到70,而其他房间不受影响,还是65度,因为FURNANCE只对总面积的20%都不到的AREA加HEATING,所以每个AREA都能在10分钟内从65升到72度,晚上睡觉的时候,只是MASTER BEDROOM保持在70度,而其他AREA都在65,对我们这样的只有2个人的家来说,防止了很多的浪费,现在已经开始使用了,但没100%DONE,大家先看看,别挑我的线还没收好的毛病啊
今天刚看到这帖子, 支持一下! 悟性+工作+爱好, 这三样都有了, 那干起来累也不觉得了, 那叫享受! BTW, 控制电路要是做在 ELECTRICAL ENCLOSURE 里就更好了, 也更安全.

此帖于 Apr 30th, 2006 08:22 被 TRADES 编辑。
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