Author/Authors :
YAMANKARADENİZ, Nurettin Uludağ Üniversitesi - Teknik Bilimler Meslek Y Okulu - Makine Programı, Turkey , COŞKUN, Salih Uludağ Üniversitesi - Teknik Bilimler Meslek Y Okulu - Makine Programı, Turkey , PASTAKKAYA, Bilsay Uludağ Üniversitesi - Orhangazi Meslek Yüksek Okulu - Makine Programı, Turkey , CAN, Muhiddin Uludağ Üniversitesi - Mühendislik Mimarlık Fakültesi - Makine Mühendisliği Bölümü, Turkey
Title Of Article :
Experimental Analysis of the By-Pass Air Ratio Effect on the Drying Performance at the Heat Pump Assisted Dryer Systems
Abstract :
Abstract: In this study, a prototype, closed loop heat pump-assisted dryer (HPD) system with the refrigerant R134a was designed, and tested. The effects of by-pass air ratio (BAR) for two different air flow rates on the system’s performance were investigated. The system performances were evaluated in terms of the heat pump performance (COPhp), the performance of all systems (COPsys) and specific moisture extraction rate (SMER). The experimental results showed that bypassing the air more than 50% reduced the COP and SMER values. The COP and SMER values remained nearly constant up to the BAR of 50% and then sharply decreased. The maximum COPhp, COPsys and SMER values were obtained as 4.8, 3.2 and 3.5 kg/kWh, respectively. It was also observed that increasing the air flow rate did not improve the performance of the system. Because, the consumption of the fan was also high, so ITKsis affected negatively.
NaturalLanguageKeyword :
Dryer , drying , heat pump , heat pump , assisted dryer
JournalTitle :
Uludağ University Journal of The Faculty of Engineering
