HVAC Multi-stage Heating/Cooling?

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Hi all,

Is it possible to simulate the multi-stage heating/cooling of HVAC system? I
tried a simple experiment in a cold winter day to compare two cases: 1)
always on with a fixed setpoint; 2) the same as 1, but the HVAC is off for
one minute and then restarts.The results show that case 2 consumes less
energy than case 1. However, with multi-stage efficiencies, case 2 should
comes more energy than case 1 due to the use of emergency heat.

I'd appreciate it very much if you could shed some light on this issue.
Thank you.

Best,
Jiakang

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THE REMINDER OF PAPER DEADLINE EXTENTION FOR SSBESCO-10.

PAPER DEADLINE EXTENDED to April 15

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Building Energy Simulations & Optimizations (SSBESO-10)

SPECIAL SESSION at

The Third IASTED African Conference on Modelling and Simulation (AfricaMS
2010)

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September 6 - 8, 2010,
Gaborone,
Botswana


http://www.iasted.org/conferences/home-685.html
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Important Dates (if there are problems with dates email to the SS organizer)
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* Submissions Due:
*** April 15, 2010 ***

* Notification of Acceptance of Complete Manuscript: *** May 30,
2010 ***

* Final Manuscripts Due:
*** June 15, 2010 ***

* Registration Deadline:
*** July 5, 2010 ***

* Conference dates:
*** Sept 6 - Sept 8, 2010***

# Accepted papers will be published in the conference proceedings
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SPECIAL SESSION

Increasingly, computer simulations and optimizations of energy flow inside
built environment are being employed to inform decisions in building design,
construction, operation, and maintenance. The objectives are improved energy
efficiency, minimum life cycle cost, quality life support, and optimized
environmental performance. The submitted papers should deal with different
simulation and optimization tools and techniques for (1) building physics;
(2) air conditioning and heating systems; (3) energy supply systems, (4) air
movement in buildings; (5) indoor air quality, (6) building services
(lighting systems, cold and hot water supply); and (7) environmentally green
buildings.

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SPECIAL SESSION on Building Energy Simulations & Optimizations at AfricaMS
2010 intends to bring together researchers and practitioners to discuss key
issues, approaches, open problems, innovative applications and trends in
this research area.

Papers should contain original contributions not published or submitted
elsewhere. Papers up to 10 pages (including figures, tables and references)
can be submitted. Papers should follow the
format, which is single spaced, two columns, 10 pt Times New Roman font. All
submissions should be electronic (in PDF) and will be peer-reviewed by at
least two program committee
members.

Full papers accepted for the workshop will be included in the proceedings.
Note that at least one author from each accepted paper should register to
attend AfricaMS 2010 to get the paper published in the proceedings. The
papers should be submitted at : bojic at kg.ac.rs

or by using EasyChair at

http://www.easychair.org/conferences/?conf=ssbeso10

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