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,
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Ar.Gör. Ayşe Fidan ALTUN
Uludağ Üniversitesi
Mühendislik Fakültesi
Makina Mühendisliği Bölümü
Bursa, Türkiye
Uludag University,
Engineering Faculty,
Department of Mechanical Engineering,
Bursa, Turkey