Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(67) station Low Head 45 years (1967-2011)| | BoM 91293 (WMO 95964) -41.06° latitude 146.79° longitude 3.5 m alt| | | |It is now 04-Jul-2013 05:40:12 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/67/LD_67_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/67/LD_67_DB.txt (Dry Design Day)| | B: CZ0706_NatHERS_1967-2011_w.txt => NEW33/67/LD_67_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/67/LD_67_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 24.5 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.31) => this Design DB was exceeded 10.2 days/year (incl std dev 5.7 days/year). 24.4 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 10.9 days/year (incl std dev 6.1 days/year). Design drybulb changes -6.1 °C per century (linear regression R² -0.62) ~> 20.7 °C mid century. 19.5 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.41) => this Design WB was exceeded 10.2 days/year (incl std dev 4.9 days/year). 19.5 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 10.2 days/year (incl std dev 4.9 days/year). Design wetbulb changes -0.9 °C per century (linear regression R²=-0.16) ~> 18.9 °C mid century. 3.7 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.96) => this Heating DB was insufficient 10.2 days/year (incl std dev 5.2 days/year). 3.0 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 10.8 days/year (incl std dev 4.7 days/year). Design heating changes -0.7 °C per century (linear regression R²=-0.15) ~> 2.6 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 02:24 followed by maximum temperature at 15:17. Nighttime cooling rate 0.251 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 02:41 ~ Max at 14:54 Nighttime cooling rate 0.294 °/hr from 20:5 to 06:47 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -3:29 ~ Max at 15:54 Nighttime cooling rate 0.253 °/hr from 19:55 to 06:46 (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 | | 24.5 DDB / 18.7 CWB | 21.9 CDB / 19.5 DWB | 3.7 DB | 5.1 DB| 20.8 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.17 % | 0.95 % | 1.39 % | 0.35 % | 0.35 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 0.99 % | 1.48 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.43 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=228) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 5772| 24.5| 16.4| 8.1| 14:54| 02:41| |+/- 1194|+/- 0.6|+/- 2.1|+/- 2.1|+/-01:00|+/-07:40| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=377) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5355| 19.5| 14.9| 4.6| 15:54| -3:29| |+/- 1708|+/- 0.6|+/- 2.1|+/- 2.0|+/-03:00|+/-09:27| +/- 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 | | 24.2 / 19.8 | 25.0 / 20.1 || 3.4 | 3.5 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 23.6 DDB / 18.2 CWB | 22.0 CDB / 19.5 DWB | 3.9 DB | 0.4 % | 22.4 DDB / 17.4 CWB | 21.2 CDB / 18.7 DWB | 4.9 DB | 1.0 % | 21.4 DDB / 16.8 CWB | 20.5 CDB / 18.0 DWB | 5.8 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 879 | 1691 | 1 | 0 | mean annual degrees days |+/- 88 |+/- 113 |+/- 2 |+/- 0 | +/- 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| | 26 | 1 | 1 | 0 | mean annual degrees hours |+/- 39 |+/- 7 |+/- 4 |+/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 17.3| 17.9| 16.5| 14.3| 12.2| 10.3| 9.7| 10.0| 10.9| 12.3| 14.1| 15.6| Average Temperature (DB) | 0.9| 1.0| 0.9| 0.8| 0.8| 0.8| 0.6| 0.6| 0.6| 0.6| 0.8| 0.8| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 219| 159| 443| 1059| 2108| 3264| 3805| 3546| 2838| 2024| 1073| 558| HD-Hr base 15 °C | 152| 110| 194| 300| 482| 553| 425| 413| 433| 352| 343| 240| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1050| 782| 1487| 2615| 4119| 5326| 5944| 5683| 4890| 4057| 2748| 1883| HD-Hr base 18 °C | 414| 325| 404| 487| 548| 558| 425| 414| 442| 395| 500| 449| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 7| 13| 4| 0| 0| 1| 0| 0| 0| 0| 0| 1| CD-Hr base 24 °C | 18| 22| 7| 0| 0| 10| 0| 0| 0| 0| 0| 4| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 1| 0| 0| 0| 0| 0| 0| CD-Hr base 27 °C | 1| 1| 0| 0| 0| 7| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 21 °C | 1| 4| 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- 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 |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 13.7| 14.3| 13.1| 11.4| 9.9| 8.2| 7.7| 8.0| 8.6| 9.6| 11.1| 12.1| Average Wet Bulb Temp (WB) | 0.9| 1.1| 0.9| 0.9| 0.9| 0.8| 0.6| 0.7| 0.7| 0.6| 0.9| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.04% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.2| 24.9| 24.0| 21.2| 18.4| 16.4| 14.7| 15.3| 16.5| 18.7| 20.7| 22.5| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.4| 24.6| 23.8| 20.8| 17.5| 15.4| 14.2| 14.7| 15.8| 17.9| 20.0| 21.5| Design maximum DB | 18.7| 19.5| 18.2| 16.5| 14.9| 13.2| 12.0| 12.0| 12.2| 13.7| 15.3| 17.0| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 10.3| 10.7| 8.7| 6.6| 4.7| 3.0| 2.3| 3.1| 4.2| 5.6| 7.2| 8.5| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 6.37% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.3| 20.1| 19.4| 17.3| 15.6| 13.7| 12.4| 12.5| 13.3| 15.0| 16.4| 17.6| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.7| 19.6| 18.7| 16.7| 14.8| 12.8| 11.8| 11.9| 12.7| 14.2| 15.8| 17.1| Design maximum WB | 16.6| 17.5| 16.3| 14.7| 13.2| 11.3| 10.4| 10.5| 10.9| 12.1| 13.5| 14.8| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 6.8| 7.0| 5.3| 4.1| 3.2| 1.9| 1.3| 1.8| 2.4| 3.1| 4.5| 5.7| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|