[Bldg-sim] Any clues? -- Ceiling Fans in South East Asia

Cramer Silkworth silkworth at transsolar.com
Thu Jun 25 06:56:17 PDT 2009


Neeraj,
 
Look into ASHRAE Standard 55, and also the ASHRAE Fundamentals Handbook.
P. Ole Fanger's work is, well, the Standard. And I think Standard 55 is
being updated soon, to better account for air motion effects. I think I
saw something about this in the last issue of the ASHRAE Journal.
 
http://www.ashrae.org/
 
-Cramer
 
J. Cramer Silkworth
Transsolar Inc.
Technical consulting for energy efficiency and user comfort in
buildings. Stuttgart - Munich - New York
134 Spring Street Suite 601
New York, NY 10012
212-219-2255
silkworth at transsolar.com

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From: \ [mailto:near_ej at yahoo.com] 
Sent: Thursday, June 25, 2009 6:14 AM
To: bldg-sim at lists.onebuilding.org
Cc: vishnu at kalpakrit.com; sanjay at kalpakrit.com
Subject: [Bldg-sim] Any clues? -- Ceiling Fans in South East Asia



Dear all,

Is there a (well documented) relationship between convective air flow
against the skin versus the thermal comfort expectation lowered
(theoretical deg. F raised for zone thermostat set-point)?

I am trying to ascertain the cooling benefit of low power high-speed
ceiling fans that are prevalent in South-East Asia. They are especially
useful in better air distribution and heat transfer from the skin of the
occupants via convection. For modeling the strategy is going to be two
fold -- [1] model the actual (low) fan power for the fans in each space
considered, and [2] model a different (higher) thermostat set-point
expectation since thermal comfort cannot be modeled in eQuest. Does this
seem okay? -- Looking for peer validation.

Thanks in advance.

regards,
Neeraj

Neeraj Kapoor
t: +91.99581.70018
Kalpakrit Sustainable Environments Pvt. Ltd.
New Delhi, India



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