comparison: src/Utils.cpp
src/Utils.cpp
- changeset 450
- d4cff87ea156
- parent 449
- 00757c056ca6
- child 452
- c4c5d02131be
equal
deleted
inserted
replaced
| 449:00757c056ca6 | 450:d4cff87ea156 |
|---|---|
| 283 | 283 |
| 284 | 284 |
| 285 double Utils::estimate_fg(double psugar, double pcara, double wgratio, double mashtime, double mashtemp, double svg, double og, bool sta1) | 285 double Utils::estimate_fg(double psugar, double pcara, double wgratio, double mashtime, double mashtemp, double svg, double og, bool sta1) |
| 286 { | 286 { |
| 287 double BD; | 287 double BD; |
| 288 double att_mashtemp; | |
| 288 | 289 |
| 289 if (psugar > 40) | 290 if (psugar > 40) |
| 290 psugar = 0; | 291 psugar = 0; |
| 291 if (pcara > 50) | 292 if (pcara > 50) |
| 292 pcara = 0; | 293 pcara = 0; |
| 295 BD = wgratio; | 296 BD = wgratio; |
| 296 if (BD < 2) | 297 if (BD < 2) |
| 297 BD = 2; | 298 BD = 2; |
| 298 if (BD > 5.5) | 299 if (BD > 5.5) |
| 299 BD = 5.5; | 300 BD = 5.5; |
| 300 if (mashtemp < 60) | |
| 301 mashtemp = 60; | |
| 302 if (mashtemp > 72) | |
| 303 mashtemp = 72; | |
| 304 } else { | 301 } else { |
| 305 BD = 3.5; | 302 BD = 3.5; |
| 306 mashtemp = 67; | 303 mashtemp = 67; |
| 307 mashtime = 75; | 304 mashtime = 75; |
| 308 } | 305 } |
| 318 * -0.00356 Attenuation factor percentage crystal malt | 315 * -0.00356 Attenuation factor percentage crystal malt |
| 319 * 0.00553 Attenuation factor percentage simple sugars | 316 * 0.00553 Attenuation factor percentage simple sugars |
| 320 * 0.547 Attenuation factor constant | 317 * 0.547 Attenuation factor constant |
| 321 * 0.597 Attenuation factor constant when STA1 gen is true. | 318 * 0.597 Attenuation factor constant when STA1 gen is true. |
| 322 */ | 319 */ |
| 323 double AttBeer = 0.00825 * svg + 0.00817 * BD - 0.00684 * mashtemp + 0.00026 * mashtime - 0.00356 * pcara + 0.00553 * psugar; | 320 double top_mashtemp = 66.11; /* Highest fermentable at 151 degrees fahrenheit */ |
| 321 /* | |
| 322 * Derived from Karl Troester's data and Matt Kahn. | |
| 323 */ | |
| 324 if (mashtemp > top_mashtemp) { | |
| 325 /* Above optimum mash temperature decrease attenuation */ | |
| 326 att_mashtemp = - 0.00684 * mashtemp; | |
| 327 } else { | |
| 328 /* Below optimum mash temperature decrease slowly attenuation */ | |
| 329 att_mashtemp = - 0.00684 * (top_mashtemp + (top_mashtemp - mashtemp) / 4); | |
| 330 } | |
| 331 | |
| 332 double AttBeer = 0.00825 * svg + 0.00817 * BD + att_mashtemp + 0.00026 * mashtime - 0.00356 * pcara + 0.00553 * psugar; | |
| 324 AttBeer += (sta1) ? 0.597:0.547; | 333 AttBeer += (sta1) ? 0.597:0.547; |
| 325 qDebug() << "estimate_fg(" << psugar << pcara << wgratio << mashtime << mashtemp << svg << og << sta1 << ") AttBeer:" << AttBeer; | 334 qDebug() << "estimate_fg(" << psugar << pcara << wgratio << mashtime << mashtemp << svg << og << sta1 << ") AttBeer:" << AttBeer; |
| 326 return round((1 + (1 - AttBeer) * (og -1)) * 10000) / 10000; | 335 return round((1 + (1 - AttBeer) * (og -1)) * 10000) / 10000; |
| 327 } | 336 } |
| 328 | 337 |
