Browsing by Author "Ilis,G.G."

Now showing 1 - 2 of 2

Citation Count: 0
Cop improvement of electric vehicle battery thermal management system with an adsorption heat pump
(Begell House Inc., 2017) Ilis,G.G.
The electric vehicle (EV) has come to be widely used in recent years and consequently the battery thermal management (BTM) of the EV's has gained attention of researchers. If the HVAC and BTM systems of the electric vehicles can be improved, the battery life period and the state of charge rate can be increased. This study aims to increase performance of the BTM. By this target, in order to improve the range of the HEV (hybrid electric vehicle), a heat pump system is suggested not only for HVAC system but also for BTM by using the waste heat in HEV. In this study, in order to improve the performance of BTM system of HEV, an adsorption heat pump assisted system is suggested. The thermodynamic analysis of a hybrid cycle involving mechanical pump, internal combustion engine (ICE), and adsorption refrigeration system is performed. The mechanical refrigeration system and the waste heat of ICE are coupled to an adsorption refrigeration system via condenser. The released heat from the condensers (radiators) is used in the isobaric desorption process of adsorption refrigeration system. The change of individual and total COP of the hybrid refrigeration systems with condenser, desorption and evaporation temperatures are investigated and results showed that, the combination of the two cycles can improve COP of vapor compression cycle used for battery pack cooling from 14 to 20% depending ambient temperature. © 2017 Begell House Inc.. All rights reserved.
Citation Count: 0
Effect of volume of evaporator and bed heat exchanger on performance of adsorption chiller
(Begell House Inc., 2018) Ilis,G.G.; Demir,H.
Adsorption chiller technology is one of the most effective ways to convert waste thermal energy into cooling. An adsorption chiller is a kind of thermal heat pump which is a promising system due to its ability for recovering heat from the thermal source at low-temperature levels and providing cooling and/or heating effects. It has advantages such as being environmentally friendly, having no vibration and lower operating costs. Adsorption chiller has four main components such as an adsorbent bed, evaporator, condenser and an expansion valve. This study is a parametric model for simulating the performance of single bed silica gel-water adsorption chiller for adsorption process. By using the developed mathematical model, the change of design parameters on the performance of the adsorbent bed and the evaporator are predicted. This model not only deals with the heat and mass transfer inside of the adsorbent bed but also consider the heat transfer from its evaporator, condenser, and pipes. The model can be reliably used as a design tool for a single bed adsorption chiller and the prediction of the performance of the chiller without any experiments. The model will provide designers with useful information about the design of adsorption chiller. © 2018 Begell House Inc.. All rights reserved.