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THE LOW HEAT REJECTION ENGINE CONCEPT is not new. Engine designers have long been aware that both aximizing the temperature of combustion and minimizing the losses of combustion energy prior to the expansion cycle will increase thermodynamic efficiency. However, material limitations have restrained the development of such interests. The development and introduction of advanced ceramic materials in the past few decades has enabled low heat
rejection research to progress, principally in the field of compression ignition engines. Below are several sets of design criteria which are the framework for the design process producing the engine described in this paper. While any engineering endeavor is fraught with compromises and undesirable practicalities, no individual criteria has been completely eliminated at the expense of another in this design. Figure 3 Ideal Pressure-Volume Diagrams for
Throttle and Variable Intake Expander Control, COMBUSTION will be controlled by the modulation of fuel flow to the burner. Ideally, fuel would be delivered in direct proportion to the compressed air flow.
source : personalwebs.oakland.edu
Tags : advanced ceramic materials, compression ignition engines, combustion energy, heat rejection, thermodynamic efficiency, engine designers, direct proportion, material limitations, fuel flow, oakland edu, design criteria, air flow, compromises, figure 3, modulation
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