Modules expander

Eor this example the cost of the battery limits plant is about four times the purchase cost of the equipment. This number is about two for module I-type plants designed and iastalled by the fine chemicals company itself, and about six for expanded module IV-type plants designed and built by contractors. 

The calculation of the turbine expander module depends whether or not this is a single shaft gas turbine or a multiple shaft gas turbine. In aero-derivative turbines, there are usually two or more shafts. In the latest aero-derivative turbines, there are usually two compressor sections, the LP compressor section, and the HP compressor section. This means that the turbine has three shafts the third shaft is the power shaft. The turbines that drive the compressor section are known as the gasifier turbines, and the turbine, which drives the generator, is the power turbine. The gasifier turbine produces the work to drive the compressor. 

A fuel cell system for automobile application is shown in Figure 1.5 [41]. At the rated power, the PEMFC stack operates at 2.5 atm. and 80°C to yield an overall system efficiency of 50% (based on lower heating value of hydrogen). Compressed hydrogen and air are humidified to 90% relative humidity at the stack temperature using process water and heat from the stack coolant. A lower system pressure is at part load and is determined by the operating map of the compressor-expander module. Process water is recovered from spent air in an inertial separator just downstream of the stack in a condenser and a demister at the turbine exhaust. 

The compressor-expander module and the radiator fan are the biggest parasitic power consumers in the system, taking up nearly 15% of the gross power generated. 

Based on the experience of two previous generations of scroll-based compressor/expander modules developed with DOE, design and build a hybrid compressor/expander module using both turbomachinery and scroll compression. 

Deliver a system with equivalent thermodynamic performance, at significantly lower weight and volume, when compared to previous generations of scroll compressor/expander modules. 

Figure 1. Second Generation Scroll Compressor/ Expander Module...

Our first step was the construction and testing of a breadboard model of the system, as shown in Figure 2. In this configuration, a conventional automotive turbocharger (in the foreground) was coupled to the scroll compressor portion of the First Generation Compressor/Expander Module (in the... 

Distracted alarm systems are systems in which supervisory tines can, but they do not have to be introduced direetly to the control and indicating equipment. Usually the eontrol and indieating equipment is there eonneeted to the transmission line to whieh are also eonneeted the elosely defined modules e.g. expanding modules, the modules of printers, the modules of the power. 

The development of a hybrid compressor/expander module was reported by Selecman and McTaggart [564]. It consisted of a scroll compressor that was fed by a separate compressor/expander module. The latter utilised the remaining compression energy of the fuel cell off-gas. However, the application of expander turbines, though attractive to reduce parasitic power losses of the compressor, is certainly limited to a minimum system power equivalent of 10 kW or higher due to weight, complexity and price. Gee reported on a turbo compressor/expander module developed by Honeywell for a 50-kW fuel cell [565]. The compressor, which worked with up to llOOOOrpm, had 8.0-kW input power with an expander and 14.3 kW... 

Selecman, G.E. and McTaggart, P.E. (2002) Hybrid compressor/expander module. Progress report hydrogen, fuel cells and infrastructure technologies, US Department of Energy. 

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