[TRNSYS-users] solar absorption cooling

[Ayşe Fidan Altun]

Dear TRNSYS users,

I do have a question about double and single effect absorption models. When
I check the catalog data of Type 107 (single-effect) and Type 677
(double-effect) absorption models I realized that especially for double
effect systems capacity reduces dramatically according to hot water inlet
temperature. I would like to make a comparison of single and double effect
models performances. When I would like to compensate the same amount of
cooling load of a building with two seperate models of single or double
effect absorption chillers, auxiliary heat requirement is much larger for
double effect system which is not reasonable. I  tried two options first I
chose a high rated capacity and low hot water inlet temperature (27.8 kW
and 126 C in order to compensate 6kW cooling load) and chiller worked at
part load, secondly I chose very high inlet temperature (175 C) and
capacity of the chiller is as the same with the cooling load of the
building (6 kW) works at full load . For any case, my double effect
absorption chiller requires enormous auxiliary heat when compared to single
effect one, even though it has better COP values than the single effect
chiller.

If you can help me I will be appreciated, I am really confused.

Kind regards,

-- 
Ar.Gör. Ayşe Fidan ALTUN

Uludağ Üniversitesi
Mühendislik Fakültesi
Makina Mühendisliği Bölümü
Bursa, Türkiye
e-mail: aysealtun at uludag.edu.tr <mkilic at uludag.edu.tr>


Uludag University,
Engineering Faculty,
Department of Mechanical Engineering,
Bursa, Turkey
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