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Titolo:
Real heat recovery with air handling units
Autore:
Roulet, CA; Heidt, FD; Foradini, F; Pibiri, MC;
Indirizzi:
Ecole Polytech Fed Lausanne, Lab Energie Solaire & Phys Batiment, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne Lausanne Switzerland CH-1015 ne, Switzerland
Titolo Testata:
ENERGY AND BUILDINGS
fascicolo: 5, volume: 33, anno: 2001,
pagine: 495 - 502
SICI:
0378-7788(200105)33:5<495:RHRWAH>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Keywords:
heat recovery; air handling units; efficiency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Roulet, CA Ecole Polytech Fed Lausanne, Lab Energie Solaire & Phys Batiment, CH-1015 Lausanne, Switzerland Ecole Polytech Fed Lausanne Lausanne Switzerland CH-1015 land
Citazione:
C.A. Roulet et al., "Real heat recovery with air handling units", ENERG BLDG, 33(5), 2001, pp. 495-502

Abstract

More and more air handling units are equipped with heat recovery systems, with the aim of decreasing the energy use in buildings for heating and cooling. The efficiency of the heat recovery system is often used to calculate the energy saving. However, air-handling units do not always function as planned. In particular, parasitic shortcuts and leakage may decrease dramatically the efficiency of ventilation and heat recovery. In addition, these units need electrical energy for fans, which may be more precious than saved heat. Measurements, using tracer gas dilution technique have detected various malfunctions in several units. This paper addresses real energy recovery with air handling units from a theoretical point of view and presents results of measurements on 13 units. In the best three cases, the real, global heat recovery efficiency was between 60 and 70% for units having a 80% nominal efficiency. In the three worst cases, the global efficiency was less than 10%. For these cases, the heatrecovery system uses more energy than it saves. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 19:26:09