Heat management systems

To ensure flawless presentations, MagniView 480C have enhanced resolution for shaper images, and a 4 3 graphics aspect ratio for distortion-free shapes. A state-of-the-art heat management system keeps panels cool, and top-mounted controls allow easy image fine tuning. 

Advanced Heat Management System, with a Built-In Cooling Fan and Infrared Heal Filter... 

Direct methanol fuel cell (DMFC) was developed in 1950s-1960s, based on the liquid alkaline or aqueous acid solution as the electrolyte. It converts the methanol directly into electricity, instead of using indirectly produced hydrogen from methanol through the reforming process. Today, DMFC commonly refers to as the one that employs PEM as the electrolyte. Fuel for DMFC is a dilute solution of methanol, usually 3-5 wt% in water. The size of DMFC can be considerably smaller than PEMFC because of the elimination of fuel processor, and complex humidification and heat management systems. The performance of DMFC is relatively low compared to that of PEMFC. 

Modify the reaction pathway, the operating conditions, the heat management system, and the reactor configuration. 

Change heat management systems. Substitute sources of thermal energy and provide active and passive control. For example, for the catalytic liquid-phase oxidation of a substituted acetophenone to produce carboxyhc acid operating at 80°C, the reaction is very exothermic (-920 MJ/kmol acetophenone) and poses great potential for temperature runaway. Temperature runaway can be prevented by the use of a catalyst that deactivates at 100°C. 

Table 10.1 shows variations in gas consumption rates, water production rate, and heat generation rate for different fuel cell stack power. As we can see, with increased power level, subsystems such as air and fuel delivery system, and water and heat management systems also scale up in size and complexity. 

In a fuel cell power system, the stack is integrated with a number of subsystems such as air supply system, fuel supply system, water removal and management cooling and heat management system and power supply management and control subsystem as shown in Figure 10.7. 

Membrane reactor design with integrated heat management systems and optimal feed flow/catalyst contact with the catalyst placed inside the membranes (Diniz da Costa eta ., 2009). 

---