Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB( 3) station Longreach 45 years (1967-2011)| | BoM 36031 (WMO 94346) -23.44° latitude 144.28° longitude 192.5 m alt| | | |It is now 03-Jul-2013 22:53:07 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/3/LO_3_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/3/LO_3_DB.txt (Dry Design Day)| | B: CZ0304_NatHERS_1967-2011_w.txt => NEW33/3/LO_3_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/3/LO_3_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 41.5 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.04) => this Design DB was exceeded 10.1 days/year (incl std dev 4.3 days/year). 41.8 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 8.3 days/year (incl std dev 3.8 days/year). Design drybulb changes -1.3 °C per century (linear regression R² -0.14) ~> 41.0 °C mid century. 24.8 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.81) => this Design WB was exceeded 10.3 days/year (incl std dev 4.9 days/year). 24.9 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.0 days/year (incl std dev 4.4 days/year). Design wetbulb changes 3.0 °C per century (linear regression R²=0.43) ~> 26.8 °C mid century. 3.5 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.92) => this Heating DB was insufficient 9.4 days/year (incl std dev 4.8 days/year). 2.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.0 days/year (incl std dev 4.1 days/year). Design heating changes -0.8 °C per century (linear regression R²=-0.08) ~> 1.9 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 06:05 followed by maximum temperature at 15:41. Nighttime cooling rate 0.823 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 06:11 ~ Max at 15:36 Nighttime cooling rate 1.085 °/hr from 19:58 to 07:31 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -1:51 ~ Max at 16:00 Nighttime cooling rate 0.413 °/hr from 20:4 to 07:33 (evenings following 3PM design conditions). ___________________________________________________________________________ ___________________________________________________________________________ |Option 1 Dry summer | Option 2 Wet summer |Winter(8AM)| Daily | Yearly | |design DB / coinc WB | coinc DB / design WB | heating | Range | Range | | 41.5 DDB / 19.6 CWB | 29.2 CDB / 24.8 DWB | 3.5 DB |13.7 DB| 38.0 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.19 % | 16.50 % | 24.62 % | 0.23 % | 0.31 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 16.58 % | 24.72 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.42 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=301) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 8198| 41.6| 24.2| 17.4| 15:36| 06:11| |+/- 676|+/- 0.7|+/- 3.1|+/- 3.1|+/-01:00|+/-01:02| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=259) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5597| 25.0| 21.0| 4.0| 16:00| -1:51| |+/- 1813|+/- 0.7|+/- 2.2|+/- 2.2|+/-03:42|+/-06:33| +/- standard deviation |________|________|_______|_________|________|________| AIRAH critical design excludes 0.25 % extremes (24 hours and 8AM-6PM) _________________________________________________ _________________________ | Critical Cooling || Critical Heating | | 24 hour | 8AM-6PM || 24 hour | 8AM-6PM | | DB / WB | DB / WB || DB | DB | | 41.2 / 24.8 | 42.0 / 25.1 || 3.1 | 6.8 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 40.7 DDB / 19.6 CWB | 29.1 CDB / 24.5 DWB | 3.8 DB | 0.4 % | 39.3 DDB / 19.5 CWB | 29.0 CDB / 23.8 DWB | 5.3 DB | 1.0 % | 38.1 DDB / 19.3 CWB | 29.2 CDB / 23.1 DWB | 6.8 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 232 | 442 | 1049 | 608 | mean annual degrees days |+/- 52 |+/- 74 |+/- 143 |+/- 106 | +/- standard deviation |____________|____________|____________|____________| Cooling degree hour base temps 21 °C, 24 °C & 27 °C. _____________________________________________________ | Cooling | Cooling | Non-Evaporative Cooling | |DegHr base24|DegHr base27|WB DH base21|WB DH base24| | 25165 | 14597 | 1057 | 45 | mean annual degrees hours |+/- 3428 |+/- 2548 |+/- 564 |+/- 47 | +/- standard deviation |____________|____________|____________|____________| Average cooling and heating degree hours (D-Hr) tabulated by month _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 29.7| 28.8| 27.2| 23.7| 19.2| 15.6| 15.1| 17.4| 21.6| 25.6| 28.1| 29.6| Average Temperature (DB) | 1.8| 1.6| 1.3| 1.3| 1.3| 1.3| 1.2| 1.3| 1.2| 1.4| 1.4| 1.5| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2| 1| 5| 66| 565| 1461| 1797| 1199| 387| 73| 8| 1| HD-Hr base 15 °C | 8| 6| 10| 72| 315| 446| 481| 372| 199| 69| 14| 6| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 12| 7| 34| 266| 1276| 2599| 3030| 2174| 897| 244| 49| 10| HD-Hr base 18 °C | 28| 22| 41| 188| 473| 593| 598| 489| 321| 156| 51| 17| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4368| 3422| 3000| 1574| 503| 130| 125| 398| 1229| 2540| 3492| 4385| CD-Hr base 24 °C | 1130| 898| 703| 430| 199| 94| 81| 225| 350| 606| 747| 933| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2763| 2045| 1710| 739| 133| 17| 19| 116| 584| 1459| 2174| 2837| CD-Hr base 27 °C | 896| 701| 536| 280| 90| 23| 23| 124| 234| 456| 570| 752| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 328| 387| 135| 15| 1| 0| 0| 0| 1| 2| 33| 154| NECD-Hr base 21 °C | 263| 298| 153| 35| 2| 0| 0| 0| 6| 4| 52| 147| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19| 18| 3| 0| 0| 0| 0| 0| 0| 0| 1| 4| NECD-Hr base 24 °C | 28| 29| 6| 2| 0| 0| 0| 0| 2| 0| 3| 6| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.5| 19.9| 17.7| 14.7| 12.0| 9.4| 8.4| 9.1| 11.3| 13.9| 16.2| 18.2| Average Wet Bulb Temp (WB) | 1.4| 1.5| 1.5| 1.5| 1.5| 1.2| 1.5| 1.1| 1.5| 1.1| 1.2| 1.1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.81% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 41.2| 39.4| 38.0| 35.2| 31.2| 28.6| 29.2| 32.3| 36.6| 39.5| 41.4| 41.9| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 40.7| 39.4| 38.0| 35.0| 31.0| 28.0| 28.1| 31.2| 35.7| 38.6| 40.7| 41.6| Design maximum DB | 28.0| 27.0| 24.9| 22.0| 18.9| 15.7| 15.0| 16.1| 19.6| 23.4| 25.9| 27.9| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 17.9| 18.0| 15.1| 10.9| 5.8| 2.2| 1.6| 2.6| 5.8| 9.9| 14.1| 16.3| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.75% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 25.2| 24.7| 23.7| 21.4| 19.7| 17.8| 17.0| 17.4| 19.2| 21.0| 22.6| 24.3| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.8| 24.9| 23.8| 21.8| 19.9| 17.6| 17.2| 17.2| 19.1| 20.4| 22.3| 23.6| Design maximum WB | 23.4| 23.5| 22.5| 19.6| 17.4| 14.6| 13.6| 13.7| 16.7| 18.6| 20.5| 22.4| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.7| 12.4| 9.2| 5.9| 2.5| 0.0| -0.9| -0.7| 1.6| 4.1| 6.9| 9.1| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|