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The goal of this study is to investigate comparatively the performance of an integrated cooling system comprised of an adsorption cooling cycle (ADC) and a vapor cooling cycle (VCC) with two different configurations, namely (cascaded and serial connected evaporators). The ADC chiller relies on the thermal compressor with two adsorption beds, which use three different adsorbents (RD silica gel, RD silica gel 2060, and silica gel- LiCl) and water (adsorbate) as a working pair separately. The thermal compressor operates by outside waste or solar-based thermal sources that have low-level temperatures below 100 °C. R152A was selected for the VCC chiller. This article pays particular attention to evaluating the ADC adsorbents and (ADC-VCC) connection configurations based on the first and second law of thermodynamics. The investigations have been implemented at different ADC evaporator temperatures. The effect of adsorption cycle time and ambient temperature on the overall coefficient of performance were also investigated and discussed for both configurations. Furthermore, the ADC and VCC coefficient of performances and the performance ratio (PR) were investigated at different ADC evaporator temperatures. The relation between the adsorbent mass and the cooling load was also discussed in this paper.

In this paper, thermal and hydraulic analysis of a dual-separated cooling channel was performed for the cooling applications of different automotive lighting systems. A single LED and multi-LEDs were considered to evaluate the thermal and hydraulic performance as well as the lighting properties of automotive headlights. The detailed hydraulic analysis was theoretically evaluated for developing laminar flow to get higher thermal performance with less pumping power. The theoretical and simulation results for the dual-separated cooling channel were compared and discussed. Unlike the constant properties were used in the current literature, thermal analysis with temperature-dependent properties was performed to estimate Nusselt number preciously for dual-separated cooling channels. The temperature measurements were also performed in the experimental study to compare the numerical results. The light output parameter of the LEDs depends on junction temperature, it was found that the increase in light output by using a dual-separated cooling channel was about 10% for all cases. Otherwise, higher junction temperature values lead to a reduction in operating efficiency. The top copper surface temperature drop was higher than 50%, and the junction temperature had been reduced by 36% to ensure the desired operating conditions of the automotive lighting system.