RE: {District Cooling Forum} District Energy Sub-metering

[Edward T. Borer Jr.]

Steve,

 

For chilled water, condenser water, and a few rare condensate applications, I’m quite partial to mag meters. We use them extensively in the plant and in campus buildings. They are accurate, repeatable, good turn-down, nothing in the flow path, no DP issues, minimal issues with fouling, minimal pipe diameters required. No wireless meters on our campus.

Vortex shedders for steam are typical in our campus buildings. Orifice plates for steam in the plant and in older legacy applications.

I’ll pass this on to our Building Energy Management team.

 

Ted

 

 

 

From: district-co...@googlegroups.com [mailto:district-co...@googlegroups.com] On Behalf Of Steve Tredinnick
Sent: Wednesday, October 10, 2012 12:02 PM
To: district-co...@googlegroups.com
Subject: {District Cooling Forum} District Energy Sub-metering

 

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 apoligize 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

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[Tredinnick, Steve]

Thanks for the input Ted.  My preferences for meters track exactly with yours for all the applications stated.  I am particularly interested in the building side sub-metering after the “custody transfer” of the chilled water, hot water and steam if the building charges other departments or if you need to meter for energy use for a Federal Research Project and the like.

Look forward to hearing from your building energy management team.

Best Regards,

Steve

 

Steve Tredinnick, PE, CEM
Syska Hennessy Group, Inc.

Direct: 608-287-4753