Step-by- step Kalkulation of Kompresjon Ratios andDicharge Temperatures

To zrozumiałe, że kalkulacje te są kalkulacyjne, bo kompresja i temperatura są wysokie, a te kalkulacje pomagają zoptymalizować wydajność i wydajność, a następnie kompresory.

Calculating Compression Ratio

Te kompresja ratio is thee ratio of thee maximum tem minimume in an engine cycle. It i s calculated using thee formula:

Xi1; Xi1; FLT: 0 Xi3; Xi3; Compression Ratio (CR) = V Xi1; Xi1; FLT: 1 Xi3; Xi3; max Xi1; Xi1; FLT: 2 Xi3; Xi1; FLT: 3 XI3; Xi3; Min Xi1; Xi1; FLT: 4 Xi3; Xi1; XI1; FLT: 5 XI3; XI3; XIX3; FLT: 5 XIXI3; XIXIXL;

Where V present 1; Xi1; FLT: 0 presendi3; Xi3; Xi1; FLT: 1 presendisation 3; Xi3; is the volume at te bottom dead center (BDC) andV presenti1; Xi1; FLT: 2 presenti3; Xi3; min presenti1; FLT: 3 presenti3; is thee volume atte top dead center (TDC). To determinae these volumes, mesiurements of thee engine 's cylindeir dimensions are exediud.

Kalkulating Dicharge Temperature

Te discharge temperatur is the temperatur of the gas after compression or expansion. It can be estimated using thee isentropic process assumption with thee following formula:

Xi1; Xi1; FLT: 0 XI3; Xi3; T XI1; XI1; FLT: 1 XI3; XI3; discharge Xi1; XI1; FLT: 2 XI3; XI3; XI1; FLT: 3 XI3; XI3; XI3; XI1; FLT: 4 XI3; XI3; * (CR) XI1; FLT: 5 XI3; XI3; (k- 1) / k XIF 1; FLT: 6 XI3; XI1; XI1; XI1; FLT: 7 XID3; X3; X3; FLS;

Where T is 1; Xi1; FLT: 0 is 3; Xi3; initial is 1; Xi1; FLT: 1 is 3; Xi3; is the initiatial temporature before compression, CR is the compression ratio, and k is thee specific heat ratio (typically 1.4 for air). This formula assumes an ideal, adiabatic process.

Badanie Calculation

Suppose an engine has an initional temperatur of 300 K anda compression ratio of 10. Using k = 1.4, the discharge temperatur is calculated as:

Xi1; Xi1; FLT: 0 XI3; XI3; XI3; XI1; FLT: 1 XI3; XI3; XI1; FLT: 2 XI3; XI3; XI3; XI1; XI1; FLT: 3 XI3; XI3; (1.4- 1) / 1.4 XI1; XI1; FLT: 4 XI3; FLT: 3; XI300 * 10 XI1; XI1; FLT: 5 X3; X3; XI3XI1; FLT: 6 XIXI3; X3; XL 300 * 1.9XIXIX579 K XI1; XIXIX1; FLT: 7 XIX33; X3;

This indicates thee temperatur of thee gas after compression reaches approxiately 579 K.