Clean Domestic Fuels Enhancement Act of 1991

[AI summary unavailable — showing source text] Clean Domestic Fuels Enhancement Act of 1991 - Title I: Nonvehicular Oil and Natural Gas Provisions - Directs the Secretary of the Energy to expand research and demonstration programs regarding: (1) certain natural gas recovery and cofiring techniques; and (2) natural gas heating and cooling technologies. Authorizes appropriations for such programs and for Federal fuel cells research and development. Amends the Renewable Energy and Energy Efficiency Technology Competitiveness Act of 1989 to direct the Secretary to: (1) solicit proposals for, and provide financial assistance to, joint ventures for fuel cell technology demonstration; and (2) conduct a program to promote the early commercial application of fuel cell systems for the production of electricity by demonstrating such systems in Federal buildings. Authorizes appropriations. Authorizes specified aggregate appropriations for enhanced oil recovery research and development. Directs the Secretary to implement a research, demonstration and commercialization program for high efficiency heat engines. Authorizes appropriations. Directs the National Academy of Sciences to study and report to the Congress on factors affecting the dome…