chilled water and hot water sub-metering
Len-IDEA
Greetings district energy colleagues!
I am in the process of writing my next installment for the District Energy magazine column Inside Insights on chilled water and hot water sub-metering on the building side of district energy customers. My goal is to address several technologies (turbine meter, swirl meter, ultrasonic, insertion magmeter, etc.) on their advantages and disadvantages as well as some sample installation costs for some typical sizes. I am reaching out to Flexim, Onicon and Kamstrup.
Does anyone have other recommendations to vendors or technologies?
A current project we have under design has over 300 apartments that the Building Owners wish to meter independently.
- Do any providers have similar installations?
- What worked and what didn't?
- Any lessons learned?
Has any provider used radio communication for meter reading or are your meters directly hard wired via Ethernet back to a control panel and the automation system?
Besides prorating billing costs by apartment or condominium floor area, are there other ways of skinning this cat that members have used successfully? Such as trending run time of fan coils, etc. to develop energy use? Was this successful? How accurate would it be?
I am also posting this topic in other district energy forums that may have different audiences....I apologize if you get this posting more than once.
I thank you in advance for any and all comments and information!
Best Regards,
Steve Tredinnick
Syska Hennessy Group
*We've moved! Please note address and telephone changes below*
Steve Tredinnick, PE, CEM
Vice President
Energy Services
Syska
Hennessy Group, Inc.
A member company of SH Group, Inc.
|
330
N. Wabash, |
Len-IDEA
Mechanical Engineering Specialist
Energy and Engineering Services
Purdue University
Freehafer Hall
Before this year, we have had quite an array of different types of
meters used for all of the chw, steam condensate, and domestic water
utilities. We have had them in all types of buildings (dorms,
academic, athletics, etc…) We have put together a comprehensive plan
to meter all of our buildings on campus. This year’s target was to
fully meter 47 of our buildings which we are on target to accomplish.
Next year will attack nearly the same amount of buildings. We have
put together a metering maintenance crew to be responsible for the up
keep of the meters and verify they are still calibrated over the
years.
The current install plan consists of hiring a contractor to install
the mechanical meters, and using the metering maintenance crew to
install the electric meters and all power and communication wires to
the mechanical meters. We are installing a common Data Concentrator
Control Panel (DCCP) for the meters to connect back to, and then from
there forwarding information to our Instep energy management system.
We have used other technologies in the past (turbine, ultrasonic,
differential pressure), but have standardized on inline
electromagnetic for domestic water and chilled water. We have also
standardized on vortex shedding for steam condensate. The mechanical
meters have hart communication available which allows them to be
verified to be in calibration by connection of a laptop to the DCCP
rather than directly. If needed to be recalibrated they need to be
removed and bench calibrated. These meters are known to never need to
be recalibrated but once every 20 or 30 years though.
I’ve attached some tech sheets on the meters we have decided to use.
50W is used for chw and domestic water, 72F is for steam condensate.
On Oct 10, 12:20 pm, Len-IDEA <len.i...@gmail.com> wrote:
> Greetings district energy colleagues!
>
> I am in the process of writing my next installment for the District Energy
> magazine column Inside Insights on chilled water and hot water sub-metering
> on the building side of district energy customers. My goal is to address
> several technologies (turbine meter, swirl meter, ultrasonic, insertion
> magmeter, etc.) on their advantages and disadvantages as well as some
> sample installation costs for some typical sizes. I am reaching out to
> Flexim, Onicon and Kamstrup.
>
> Does anyone have other recommendations to vendors or technologies?
>
> A current project we have under design has over 300 apartments that the
> Building Owners wish to meter independently.
>
> - What worked and what didn't?
> - Any lessons learned?
> Has any provider used radio communication for meter reading or are your
> meters directly hard wired via Ethernet back to a control panel and the
> automation system?
>
> Besides prorating billing costs by apartment or condominium floor area, are
> there other ways of skinning this cat that members have used successfully?
> Such as trending run time of fan coils, etc. to develop energy use? Was
> this successful? How accurate would it be?
>
> I am also posting this topic in other district energy forums that may have
> different audiences....I apologize if you get this posting more than once.
>
> I thank you in advance for any and all comments and information!
>
> Best Regards,
>
> Steve Tredinnick
>
> Syska Hennessy Group
>
>
> *Steve Tredinnick, PE, CEM*
> *Vice President
> *Energy Services
>
> *Syska Hennessy Group, Inc.*
>
> 330 N. Wabash,
> Suite 1505
> Chicago, IL 60611
> Tel: 608.287.4753
Len-IDEA
at Purdue University:
http://www.districtenergy.org/assets/pdfs/Forum-Attachments/Promag-50W.pdf
http://www.districtenergy.org/assets/pdfs/Forum-Attachments/Prowirl-72F-72W-73F-73W.pdf