[bldg-sim] ASHRAE system and fuel comparisons

[K Emerson]

Gerald, 

You'll be happy to know that waste heat is free
energy, and yes, you would compare your absorption
heater with a gas unit.  If I recall correctly, a unit
off 100 tons or less would be compared to a single
effect direct fired absorber (probably COP = 0.7),
over 100 tons with a double effect direct fired unit
(COP and IPLV of 1.0).  

Keith Emerson 
(member, ECB subcommittee of 90.1)


--- Gerald Pde <geraldpde at yahoo.com> wrote:

> Hi all,
> I have a general ASHRAE question. From my
> understanding, ASHRAE 90.1 does not allow comparison
> of buildings with different system types or
> different
> fuel types.
> 
> If this is true, then can a base case model with a
> gas-fired absorption chiller be compared with an
> absorption chiller that utilizes waste heat? If so,
> then can one take credit for the reduction in energy
> cost from the former to latter system?
> 
> Thanks in advance for your input.
> Gerald Pde
> 
> 
> 
> 		
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