The Compressed-Air Car Analysis Meta-Model (CACAMM) was developed by Felix Creutzig. The paper on this model is published in Environmental Research Letters. Use the link below to download the spreadsheet model.

NEW: Version 2.0 specifies the smart fortwo and smart fortwo ed as reference cars and contains a sensitivity analysis with respect to power plant mix.

Download the model (version 2.0) (1.0 MB)
Contains calculations and explanations on the first sheet, output graphics on the second sheet. (Released Nov 2, 2009)

Requires Microsoft Excel or work-alike.

The paper

F. Creutzig, A. Papson, L. Schipper, D. Kammen (2009)
Economic and environmental evaluation of compressed-air cars.
Environ. Res. Lett. 4:044011

Abstract. Climate change and energy security require a reduction in travel demand, a modal shift, and technological innovation in the transport sector. Through a series of press releases and demonstrations, a car using energy stored in compressed air produced by a compressor has been suggested as an environmentally friendly vehicle of the future. We analyze the thermodynamic efficiency of a compressed-air car powered by a pneumatic engine and consider the merits of compressed air versus chemical storage of potential energy. Even under highly optimistic assumptions the compressed-air car is significantly less efficient than a battery electric vehicle and produces more greenhouse gas emissions than a conventional gas-powered car if powered with a coal intensive power mix. However, a pneumatic-combustion hybrid is technologically feasible, inexpensive and could eventually compete with hybrid electric vehicles.

Transport Research Board

The poster on "Hot Deal or Hot Air - Life-cycle Analysis of Pneumatic Cars" was presented at Transport Research Board 2010 (pdf).

Biofuel model

The ERG biofuel analysis meta-model (EBAMM)