Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(24) station Canberra 45 years (1967-2011)| | BoM 70014 (WMO 94926) -35.31° latitude 149.20° longitude 580.0 m alt| | | |It is now 04-Jul-2013 01:12:58 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/24/CA_24_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/24/CA_24_DB.txt (Dry Design Day)| | B: CZ0703_NatHERS_1967-2011_w.txt => NEW33/24/CA_24_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/24/CA_24_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 34.6 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.25) => this Design DB was exceeded 9.9 days/year (incl std dev 4.5 days/year). 35.0 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.0 days/year (incl std dev 4.2 days/year). Design drybulb changes 1.6 °C per century (linear regression R² 0.10) ~> 36.0 °C mid century. 19.5 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.04) => this Design WB was exceeded 10.3 days/year (incl std dev 4.5 days/year). 19.6 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.6 days/year (incl std dev 4.4 days/year). Design wetbulb changes 1.8 °C per century (linear regression R²=0.34) ~> 20.6 °C mid century. -4.0 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.83) => this Heating DB was insufficient 10.5 days/year (incl std dev 4.9 days/year). -4.9 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 8.7 days/year (incl std dev 4.7 days/year). Design heating changes 4.2 °C per century (linear regression R²=0.36) ~> -2.4 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:24 followed by maximum temperature at 15:42. Nighttime cooling rate 0.590 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:33 ~ Max at 15:54 Nighttime cooling rate 1.113 °/hr from 19:50 to 07:20 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -1:59 ~ Max at 16:00 Nighttime cooling rate 0.615 °/hr from Inf:NaN to 06:39 (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 | | 34.6 DDB / 17.1 CWB | 26.0 CDB / 19.5 DWB | -4.0 DB |15.7 DB| 38.6 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.23 % | 3.08 % | 4.69 % | 0.31 % | 0.33 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 3.18 % | 4.84 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.52 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=180) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7904| 35.2| 15.5| 19.7| 15:54| 05:33| |+/- 1025|+/- 0.9|+/- 3.0|+/- 3.1|+/-01:06|+/-02:42| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=243) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6308| 19.8| 14.8| 4.9| 16:00| -1:59| |+/- 1821|+/- 0.9|+/- 2.0|+/- 1.9|+/-03:42|+/-07:60| +/- 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 | | 34.5 / 19.8 | 35.9 / 20.2 || -4.0 | -2.0 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 33.6 DDB / 16.8 CWB | 25.8 CDB / 19.3 DWB | -3.7 DB | 0.4 % | 31.4 DDB / 16.2 CWB | 25.2 CDB / 18.4 DWB | -2.3 DB | 1.0 % | 29.3 DDB / 15.8 CWB | 24.5 CDB / 17.6 DWB | -1.0 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 1406 | 2133 | 104 | 43 | mean annual degrees days |+/- 120 |+/- 142 |+/- 44 |+/- 24 | +/- 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| | 2496 | 1038 | 2 | 0 | mean annual degrees hours |+/- 1049 |+/- 566 |+/- 6 |+/- 0 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.4| 19.9| 17.3| 13.1| 9.3| 6.5| 5.5| 7.1| 9.8| 13.0| 15.9| 18.6| Average Temperature (DB) | 1.6| 1.3| 1.2| 1.1| 0.9| 1.1| 0.9| 0.9| 1.0| 1.0| 1.6| 1.3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 288| 256| 747| 2114| 4166| 5822| 6683| 5660| 3810| 2362| 1251| 595| HD-Hr base 15 °C | 181| 156| 297| 539| 593| 744| 664| 595| 539| 405| 397| 237| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 889| 825| 1725| 3616| 6157| 7884| 8819| 7757| 5677| 3957| 2436| 1457| HD-Hr base 18 °C | 375| 311| 462| 638| 621| 748| 665| 626| 628| 527| 561| 371| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 852| 607| 253| 19| 0| 0| 0| 0| 2| 37| 216| 510| CD-Hr base 24 °C | 444| 355| 221| 34| 0| 0| 0| 0| 4| 49| 243| 309| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 408| 263| 81| 3| 0| 0| 0| 0| 0| 6| 79| 199| CD-Hr base 27 °C | 269| 212| 106| 9| 0| 0| 0| 0| 1| 12| 119| 157| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 2| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 21 °C | 1| 6| 0| 0| 0| 0| 0| 0| 0| 0| 0| 2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 14.0| 14.2| 12.4| 9.3| 6.6| 4.4| 3.4| 4.2| 6.3| 8.6| 10.7| 12.4| Average Wet Bulb Temp (WB) | 1.2| 1.0| 1.1| 1.2| 1.0| 1.1| 1.0| 0.9| 0.9| 0.9| 1.1| 1.1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 7.60% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 35.9| 34.2| 30.7| 25.5| 20.7| 16.2| 15.2| 18.1| 22.4| 26.7| 30.8| 33.5| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 34.7| 33.4| 30.0| 24.5| 19.6| 15.0| 14.0| 16.9| 20.9| 25.0| 29.5| 32.0| Design maximum DB | 19.0| 19.0| 17.0| 14.0| 11.1| 9.0| 7.7| 8.1| 10.5| 13.0| 15.6| 17.1| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 7.7| 8.2| 4.8| 0.2| -2.7| -4.3| -5.0| -4.2| -1.8| 0.5| 2.8| 5.5| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 3.86% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.2| 20.1| 18.5| 16.3| 13.7| 11.4| 10.2| 11.5| 13.6| 16.1| 17.8| 18.9| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.4| 19.6| 17.9| 15.7| 13.3| 10.8| 9.7| 10.8| 13.2| 15.3| 17.2| 18.1| Design maximum WB | 17.2| 17.3| 15.9| 13.6| 11.3| 8.8| 7.3| 7.6| 10.1| 12.3| 14.3| 15.6| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 5.5| 6.3| 3.5| -0.4| -3.2| -4.6| -5.3| -4.6| -2.5| -0.4| 1.6| 3.8| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|