Effect of Exhaust Gas Temperature on the Performance of Automobile Adsorption Air-Conditioner

Abstract

An adsorption air conditioning unit of two beds was designed and built. Each bed was constructed from two concentric copper pipes sets, the length of the pipes in each set was 1500 mm pipe. The inner pipe was 50 mm in diameter while the outer pipe was of 100 mm diameter. The inside surface of the outer pipe and the outside surface of the inner pipe were covered by two active carbon layers which were separated from each other by a 5 mm space, to allow for methanol vapour penetration through the two layers. Each bed was inserted in a metal pipe to convey the hot stream of exhaust gases, to form a two passes heat exchanger. To complete the adsorption air conditioner cycle, an evaporator and condenser were connected to the two beds. Exhaust gases were produced by a propane burner, which can be adjusted to deliver hot gases at a temperature range of 80 to 140°C. The work showed that there was direct relationship between the hot gas temperatures that was used to heat the bed and the chilled water temperature. When the hot gases temperature exceeded 120°C, the whole cycle time increased along with a slight increase in chilled water temperature with a reduction in COP. A minimum chilled water temperature of 7.6°C was obtained. This chilled water was supplied to a fan coil unit to maintain an inside temperature of 24.2°C for a 600 Watt conditioned space load. The maximum cycle COP was about 0.31 when the hot gas temperature was 120°C.

Machine Motion Equations Presented in a New General Format

“…Longitudinal axis of the tube Diametrically central axis Mavukkandy et al, 2016;Yeargin et al, 2016;Madani and Dababneh, 2016;Alhasanat et al, 2016;Elliott et al, 2016;Suarez et al, 2016;Kuli et al, 2016;Waters et al, 2016;Montgomery et al, 2016;Lamarre et al, 2016;Daud et al, 2008;Taher et al, 2008;Zulkifli et al, 2008;Pourmahmoud, 2008;Pannirselvam et al, 2008;Ng et al, 2008;El-Tous, 2008;Akhesmeh et al, 2008;Nachiengtai et al, 2008;Moezi et al, 2008;Boucetta, 2008;Darabi et al, 2008;Semin and Bakar, 2008;Al-Abbas, 2009;Abu-Ein, 2009;Opafunso et al, 2009;Semin et al, 2009a;2009b;2009c;Zulkifli et al, 2009;Marzuki et al, 2015;Bier and Mostafavi, 2015;Momta et al, 2015;Farokhi and Gordini, 2015;Khalifa et al, 2015;Yang and Lin, 2015;Chang et al, 2015;Demetriou et al, 2015;Rajupillai et al, 2015;Sylvester et al, 2015;Ab-Rahman et al, 2009;…”

Performance Study of Solar Adsorption Refrigeration System Using Activated Carbon - Methanol

“…An air -conditioning unit based on adsorption thermodynamics cycle of two generator beds was designed and fabricated by Khalifa et al (2015) [7]. The two beds were constructed from two concentric pipes made of copper.…”