Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB( 1) station Darwin 45 years (1967-2011)| | BoM 14015 (WMO 94120) -12.42° latitude 130.89° longitude 35.0 m alt| | | |It is now 03-Jul-2013 22:39:39 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/1/DA_1_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/1/DA_1_DB.txt (Dry Design Day)| | B: CZ0101_NatHERS_1967-2011_w.txt => NEW33/1/DA_1_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/1/DA_1_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 34.7 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.76) => this Design DB was exceeded 10.3 days/year (incl std dev 3.6 days/year). 34.7 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 8.7 days/year (incl std dev 3.1 days/year). Design drybulb changes 0.1 °C per century (linear regression R² 0.04) ~> 34.8 °C mid century. 27.4 ° Design WB = mean of 10th highest 3PM each year + (std dev * 3.01) => this Design WB was exceeded 9.8 days/year (incl std dev 6.0 days/year). 27.4 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 11.6 days/year (incl std dev 6.7 days/year). Design wetbulb changes 0.6 °C per century (linear regression R²=0.21) ~> 27.7 °C mid century. 16.8 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.05) => this Heating DB was insufficient 10.1 days/year (incl std dev 5.0 days/year). 16.4 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 10.1 days/year (incl std dev 4.7 days/year). Design heating changes -2.1 °C per century (linear regression R²=-0.25) ~> 15.1 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:12 followed by maximum temperature at 15:34. Nighttime cooling rate 0.298 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:58 ~ Max at 15:18 Nighttime cooling rate 0.340 °/hr from 19:58 to 07:51 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -3:05 ~ Max at 15:30 Nighttime cooling rate 0.149 °/hr from 20:14 to 07:52 (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 | | 34.7 DDB / 22.4 CWB | 30.5 CDB / 27.4 DWB | 16.8 DB | 6.9 DB| 17.9 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.11 % | 60.59 % | 17.13 % | 0.11 % | 0.28 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 60.66 % | 17.16 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.22 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=814) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 6908| 34.4| 25.4| 9.1| 15:18| 05:58| |+/- 742|+/- 0.5|+/- 1.8|+/- 1.9|+/-00:48|+/-03:27| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=495) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6353| 27.2| 23.9| 3.3| 15:30| -3:05| |+/- 1100|+/- 0.5|+/- 1.4|+/- 1.4|+/-03:00|+/-07:15| +/- 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 | | 34.3 / 27.2 | 34.8 / 27.3 || 16.7 | 18.3 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 34.0 DDB / 22.9 CWB | 30.1 CDB / 27.0 DWB | 17.2 DB | 0.4 % | 33.5 DDB / 23.1 CWB | 29.7 CDB / 26.6 DWB | 18.3 DB | 1.0 % | 33.0 DDB / 23.2 CWB | 29.5 CDB / 26.4 DWB | 19.3 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 0 | 3 | 1266 | 521 | mean annual degrees days |+/- 0 |+/- 3 |+/- 91 |+/- 60 | +/- 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| | 30374 | 12511 | 18403 | 3660 | mean annual degrees hours |+/- 2184 |+/- 1447 |+/- 2041 |+/- 903 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 28.0| 27.8| 27.8| 28.0| 26.6| 24.6| 24.3| 25.4| 27.4| 28.8| 29.1| 28.7| Average Temperature (DB) | 0.5| 0.6| 0.6| 0.5| 0.8| 1.0| 0.9| 0.7| 0.6| 0.4| 0.5| 0.7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 1| 1| 0| 0| 0| 0| 0| HD-Hr base 15 °C | 0| 0| 0| 0| 0| 4| 2| 2| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 2| 32| 30| 8| 1| 0| 0| 0| HD-Hr base 18 °C | 0| 0| 0| 0| 6| 50| 34| 16| 2| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2925| 2485| 2733| 2821| 2246| 1356| 1300| 1658| 2484| 3450| 3542| 3373| CD-Hr base 24 °C | 380| 409| 403| 337| 365| 296| 290| 264| 355| 310| 312| 466| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1132| 880| 1028| 1222| 938| 491| 451| 619| 1018| 1557| 1676| 1499| CD-Hr base 27 °C | 297| 312| 296| 231| 197| 164| 155| 136| 195| 227| 243| 356| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2771| 2514| 2553| 1629| 712| 177| 106| 255| 840| 1773| 2352| 2722| NECD-Hr base 21 °C | 275| 218| 272| 417| 439| 172| 135| 223| 399| 401| 295| 248| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 735| 643| 578| 229| 42| 1| 1| 2| 27| 202| 500| 700| NECD-Hr base 24 °C | 226| 186| 189| 147| 64| 3| 3| 4| 47| 148| 206| 181| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.9| 24.9| 24.6| 23.1| 20.5| 17.9| 17.7| 19.2| 21.6| 23.4| 24.4| 24.8| Average Wet Bulb Temp (WB) | 0.4| 0.3| 0.4| 0.8| 1.4| 1.5| 1.2| 1.3| 1.0| 0.6| 0.4| 0.4| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 3.30% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.6| 33.1| 33.8| 34.4| 33.7| 32.6| 32.6| 33.5| 34.7| 35.3| 34.9| 34.5| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.4| 33.1| 33.9| 34.5| 33.9| 32.6| 32.6| 33.1| 34.3| 34.8| 34.5| 34.2| Design maximum DB | 28.9| 28.5| 28.0| 27.0| 25.8| 24.3| 23.9| 24.4| 26.1| 27.9| 28.9| 29.1| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.5| 22.6| 22.6| 21.6| 18.7| 15.8| 15.9| 17.1| 20.2| 22.4| 22.4| 22.6| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 1.29% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 27.4| 27.2| 27.1| 26.5| 25.1| 23.9| 23.0| 23.9| 25.1| 26.5| 27.2| 27.4| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 27.5| 27.4| 27.1| 26.6| 25.5| 24.0| 23.4| 24.0| 25.3| 26.4| 27.3| 27.2| Design maximum WB | 26.5| 26.3| 26.4| 25.8| 24.8| 23.2| 22.6| 23.3| 24.5| 25.8| 26.5| 26.6| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.5| 21.5| 20.5| 16.3| 12.0| 8.9| 8.5| 10.1| 13.7| 17.2| 19.9| 20.4| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|