Thursday, January 14, 2010

Measurement & Verification System




I am over due in updating progress regarding how we are doing regarding our efforts to achieve net zero. Presently we are nearly complete with the installation of a measurement and verification system, this will be a tremendous help in identifying how the project is performing.

We have attempted to monitor the temperatures in the large tank, domestic hot water and the sand and taconite solar thermal areas via hand recording these temperatures as well as the room set temperatures, outside temps, and the amount of wood burned.

Between December 16 and December 26 the home was without heat, due to a boiler malfunction and the system unknowingly being shut down. When I arrived on December 26, 2009 the temperature in the home was 51 degrees. This was 10 days with subzero temps and cloudy days. Note to self that heat from the storage area below the slab of the home as well as the Passive House performance is keeping freezing temperatures from occurring regardless if there is a mechanical system there to provide heat.

For those interested in details, the measurement and verification system that we are using to data log how the building is performing is as follows:

We are using a “Nigara” controls system, where all data is being sent so that it can send the information to us via a web site. The following is a list of the items we will be measuring:

BTU’s needed to heat the home
BTU’s collected from the solar heat evacuating tube collection system
Ground source heat used to preheat incoming ventilation air.
HRV defrost mode
When the HRV is in operation (blowers)
Taconite solar storage
Sand solar storage
Large Water Tank Storage
If the boiler is operating
PV being put into the grid
PV being used from the grid
Room temperatures in four areas
Outdoor temperatures
Domestic Hot Water Temperatures
Pump operations status
Wet floor conditions

I will post a link to the website once we get it operational this week. Bill Gausman of Peoples Electric is providing an amazing system for us to use.

48 comments:

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茂恒 said...

GOOD........................................

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KimberelyM14165 said...

may the blessing be always with you!! ........................................

韋于倫成 said...

過去的事早已消失,未來的更是渺不可知,只有現在是真實的。........................................

倩亮 said...

志不立,天下無可成之事。........................................

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于呈均名 said...

Well begun is half done. ............................................................

LeD'z said...

measurement is one of the important things to come up with a good outcome..
____________
control valves

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常映 said...

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皇銘 said...

pleasure to find such a good artical! please keep update!!.................................................................                           

Jay said...

Eco friendly property developers have been trying to build eco villages where every home is efficient, non-polluting and built from sustainable sources.

Eco builders

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江桂宸江桂宸 said...

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1615 said...

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王怡迪 said...

你怎麼能經過一片海,而忘記它的藍?......................................................................

Gene Wixson said...

Hello, Nancy. I have some specific questions about a Passive House project in Oregon, but your e-mail (nancy@isabellaecohome.org) doesn't seem to work. What is a better e-mail for you?

rich.eng said...

Hi, Nancy,

Stumbled across your blog while googling on sustainable living and heating in particular.

Have you ever heard of technologies called PAHS or AGS (Passive Annual Heat Storage or Annualized Geo Solar)?

Your method of heating your home sounds very similar. I was wondering if you could tell me any of the key differences between the technology you are using (storing heat in taconite and sand) and the PAHS and AGS models.

Regardless, I'm very intrigued by your project and am saving up to do something similar someday!

Thanks!

Rich
Milwaukee, WI

p.s. Your e-mail, nancy at isabellaecohome dot org, doesn't seem to be working

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