A historic single-cylinder engine with a mechanical efficiency operates at 140 RPM on the Lenoir cycle shown in Fig. 21. The cylinder has a double acting piston with a 12-in. bore and a 36-in. stroke....

A historic single-cylinder engine with a mechanical efficiency operates at 140 RPM on the Lenoir cycle shown in Fig. 21. The cylinder has a double acting piston with a 12-in. bore and a 36-in. stroke. The fuel has a heating value BTU/lbm and is used at an air–fuel ratio Combustion occurs at constant volume half way through the intake-power stroke when cylinder conditions equal 70°F and 14.7 psia.

Calculate:

(a) Temperature at each state of cycle. [°F]

(b) Pressure at each state of cycle. [psia]

(c) Indicated thermal efficiency. [%]

(d) Brake power. [hp]

(e) Average piston speed. [ft/sec]

FIGURE 21 Ideal flow process and actual exhaust flow process through the turbine of a turbocharger in (a) pressure–volume coordinates, and (b) temperature– entropy coordinates. The inlet air flow through the compressor of the turbocharger is the same as shown in Fig. 19 for a supercharger.