TY  - JOUR
N2  - An enhanced forced convective multi-pass solar air heating collector (MPSAHC) system aided with granite pebble bed has been investigated in this present article. The air heating collector system was tested in the outdoor solar research site of Universiti Teknologi PETRONAS, Malaysia (4.385693° N and 100.979203° E). Transport pipe for movement of heated air around the system was eliminated in the design of the MPSAHC facility to minimise the thermal losses, pressure drop and the pumping cost of the hot air in the control volume. The daily ambient temperature and relative humidity range recorded during the repeated tests are 21.09â??36.64 °C and 48.04â??87.9, respectively. The collector unit achieved a peak temperature of 80.29 °C while the optimum system air mass flow rate of 0.016 kgsâ??1 was applied. Despite high relative humidity of the environment, the stream of ambient air was heated to 48.53 °C, 57.75 °C and 71.19 °C at different positions in the MPSAHC which correspond to single pass, double pass and multi-pass effects, respectively. The porous matrix exhibited slow energy discharge at night time with air temperature difference of 14.27 °C at 18:00 h to 4.54 °C at 24:00 h over environmental air temperature. MPSAHC system delivered specific energy demand (SED) of 11.51 kWh kgâ??1 while the maximum thermal collector and daily average transient collector efficiencies of 72.59 and 36.38 were achieved, respectively. A good agreement has been established between reported studies and the present investigation. Although continuity of system operation at night was achieved using porous matrix but improvement is still needed to optimise the system performance. © 2017 Elsevier Ltd
KW  - Atmospheric humidity; Atmospheric temperature; Efficiency; Porous materials; Solar collectors
KW  -  Air mass flow rate; High relative humidities; Multi-pass; Performance analysis; Porous matrixs; Solar thermal collector; Temperature and relative humidity; Thermal collectors
KW  -  Collector efficiency
KW  -  air temperature; ambient air; concentration (composition); efficiency measurement; heating; instrumentation; performance assessment; porous medium; solar power
KW  -  Malaysia
ID  - scholars8093
Y1  - 2017///
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031804221&doi=10.1016%2fj.solener.2017.10.016&partnerID=40&md5=f68832e8a63db956f635b7c720f8360a
A1  - Kareem, M.W.
A1  - Gilani, S.I.
A1  - Habib, K.
A1  - Irshad, K.
A1  - Saha, B.B.
JF  - Solar Energy
VL  - 158
AV  - none
N1  - cited By 9
TI  - Performance analysis of a multi-pass solar thermal collector system under transient state assisted by porous media
SP  - 782
SN  - 0038092X
PB  - Elsevier Ltd
EP  - 791
ER  -