223 Increasing BMEP

Higher BMEP is attained primarily by increasing combustion cylinder air pressure. The TARGET program, for example, seeks to boost BMEP by 15% along with increased speed. High-efficiency turbochargers, larger air delivery, and intercooler systems will efficiently provide the higher air flow required. Table 2.3 indicates the effect of BMEP on power output and, therefore, on unit installed cost. This table shows the effect of increasing BMEP from 175 to 250 psi on a 40 L, 1800 rpm engine.

TABLE 2.3

Effect of BMEP on Power Output and Unit Cost

TABLE 2.3

Effect of BMEP on Power Output and Unit Cost

BMEP

Power Output

Specific Cost

(psi)

(kW)

($/kW)

Base Case

175

725

300

Step 1

200

830

262

Step 2

225

930

233

Step 3

250

1035

210

Improved lubrication, lower oil temperatures, long-life oil filters, more heat-resistant valve train materials, and spark plug firing end changes will be investigated. The goal is to achieve an annual maintenance schedule based on 2500 operating hours per year. Together, this would reduce maintenance costs by an estimated 10%.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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