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Path: Home » Indice Pubblicazioni » Convegni ATI - Accesso riservato soci CTI » CA - 61 - Perugia 2006 » Performance analysis of a hybrid sola...

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Performance analysis of a hybrid solar cooling system,coupling absorption heat pump and air handling unit based on desiccant cooling system (DEC)

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Autore: M. Citterio, M. Avitabile, B. Di Pietra, N. Fratini

Collana: CA - 61 - Perugia 2006

Note:
The aim of this paper is to show a performance and technical analysis about a hybrid solar air conditioning plant for office building. The plant is based on solar assisted absorption heat pump as principal cooling system, combined with desiccant cooling system as AHU, to offer energy saving in comparison to conventional air conditioning system. Particularly, this paper introduces the study about innovative plant configurations of high temperature solar cooling technology (absorption heat pump, Robur GAHP-W, assisted by linear parabolic solar collector) coupled with air handling unit based on desiccant cooling cycle (DEC). The dehumidifier used in the hybrid system is a rotary type heat and mass exchanger containing nominal silica gel as desiccant. Its performance is modelled using the non-linear analogy theory implemented with TRNSYS software.
Coupling of desiccant system and water ammonia absorption heat pump is realized by mean of exploitation of heat pump cooling circuit, where the cooling fluid can reach 65–70 °C, being in most cases suitable for desiccant regeneration purpose.
After sensitivity analysis of principal regulation parameters, the simulations have been done for office building located in Rome. The results are introduced in terms of plant technical feasibility and reduction of primary energy consumptions.


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