Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(15) station Williamtown 45 years (1967-2011)| | BoM 61078 (WMO 94776) -32.79° latitude 151.84° longitude 8.0 m alt| | | |It is now 04-Jul-2013 00:13:33 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/15/WE_15_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/15/WE_15_DB.txt (Dry Design Day)| | B: CZ0509_NatHERS_1967-2011_w.txt => NEW33/15/WE_15_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/15/WE_15_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 35.4 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.41) => this Design DB was exceeded 10.1 days/year (incl std dev 3.8 days/year). 35.7 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.2 days/year (incl std dev 3.4 days/year). Design drybulb changes 1.7 °C per century (linear regression R² 0.14) ~> 36.7 °C mid century. 23.5 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.03) => this Design WB was exceeded 10.0 days/year (incl std dev 3.7 days/year). 23.5 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.4 days/year (incl std dev 3.5 days/year). Design wetbulb changes 0.5 °C per century (linear regression R²=0.14) ~> 23.9 °C mid century. 4.4 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.88) => this Heating DB was insufficient 9.9 days/year (incl std dev 4.0 days/year). 2.9 ° 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 4.0 days/year). Design heating changes 1.1 °C per century (linear regression R²=0.15) ~> 3.5 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:33 followed by maximum temperature at 15:02. Nighttime cooling rate 0.421 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:32 ~ Max at 15:06 Nighttime cooling rate 0.684 °/hr from 19:48 to 07:19 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 00:52 ~ Max at 15:42 Nighttime cooling rate 0.377 °/hr from 19:44 to 06:34 (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 | | 35.4 DDB / 20.3 CWB | 28.1 CDB / 23.5 DWB | 4.4 DB |12.8 DB| 31.0 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.28 % | 7.26 % | 3.27 % | 0.30 % | 0.75 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 7.40 % | 3.38 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.55 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=153) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7691| 35.7| 18.0| 17.6| 15:06| 05:32| |+/- 1136|+/- 0.8|+/- 2.9|+/- 3.0|+/-00:54|+/-01:13| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=380) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6665| 23.6| 18.9| 4.6| 15:42| 00:52| |+/- 1765|+/- 0.7|+/- 1.8|+/- 1.7|+/-03:06|+/-07:23| +/- 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 | | 35.7 / 23.7 | 37.7 / 24.2 || 3.0 | 6.5 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 34.4 DDB / 20.3 CWB | 27.9 CDB / 23.3 DWB | 3.6 DB | 0.4 % | 32.0 DDB / 20.2 CWB | 26.9 CDB / 22.6 DWB | 4.9 DB | 1.0 % | 29.8 DDB / 19.8 CWB | 26.0 CDB / 21.9 DWB | 6.0 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 462 | 910 | 139 | 53 | mean annual degrees days |+/- 63 |+/- 83 |+/- 34 |+/- 18 | +/- 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| | 3327 | 1268 | 399 | 9 | mean annual degrees hours |+/- 819 |+/- 440 |+/- 200 |+/- 12 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.9| 22.7| 20.9| 18.0| 14.7| 12.3| 11.3| 12.5| 15.1| 17.7| 19.7| 21.7| Average Temperature (DB) | 1.0| 0.9| 0.9| 0.8| 0.9| 0.9| 0.7| 0.7| 1.0| 0.8| 1.1| 1.0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 12| 10| 59| 377| 1243| 2177| 2830| 2342| 1265| 531| 182| 51| HD-Hr base 15 °C | 16| 11| 55| 176| 413| 482| 460| 362| 286| 169| 89| 36| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 102| 83| 314| 1092| 2621| 3938| 4739| 4047| 2552| 1411| 673| 264| HD-Hr base 18 °C | 73| 56| 169| 327| 555| 584| 502| 412| 433| 290| 234| 119| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 844| 661| 359| 95| 6| 0| 1| 9| 84| 225| 390| 652| CD-Hr base 24 °C | 314| 282| 199| 72| 10| 0| 3| 26| 80| 136| 236| 300| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 352| 247| 104| 18| 0| 0| 0| 1| 24| 85| 166| 271| CD-Hr base 27 °C | 172| 161| 85| 28| 1| 0| 0| 6| 34| 69| 139| 171| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 149| 152| 40| 1| 0| 0| 0| 0| 0| 0| 9| 47| NECD-Hr base 21 °C | 103| 129| 40| 3| 0| 0| 0| 0| 0| 1| 12| 47| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4| 5| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 5| 11| 1| 0| 0| 0| 0| 0| 0| 0| 0| 1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.7| 18.9| 17.5| 14.7| 11.9| 9.7| 8.4| 8.9| 11.0| 13.4| 15.5| 17.2| Average Wet Bulb Temp (WB) | 1.0| 0.8| 0.9| 1.1| 1.2| 1.0| 1.1| 1.0| 1.0| 0.8| 1.1| 0.8| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 4.73% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 37.5| 36.0| 33.3| 29.2| 25.1| 21.4| 21.9| 24.5| 30.2| 33.0| 35.1| 36.4| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 35.6| 34.2| 31.3| 28.0| 24.0| 20.7| 20.6| 23.7| 28.3| 31.6| 33.3| 35.0| Design maximum DB | 22.8| 23.0| 21.5| 19.4| 16.8| 14.9| 13.0| 14.0| 16.1| 18.2| 20.0| 21.9| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 13.3| 13.7| 11.6| 7.9| 5.1| 3.4| 1.7| 1.9| 4.2| 6.5| 9.3| 11.1| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 4.96% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.6| 24.4| 22.9| 20.6| 18.4| 16.1| 14.9| 15.9| 18.1| 20.3| 22.0| 23.2| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.4| 23.6| 22.2| 19.9| 18.1| 15.5| 14.4| 15.0| 17.1| 19.0| 21.0| 22.4| Design maximum WB | 21.2| 21.5| 20.0| 17.7| 15.4| 13.3| 11.6| 12.1| 14.2| 16.5| 18.4| 20.1| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.4| 12.1| 9.6| 6.5| 4.0| 2.3| 1.2| 1.2| 3.2| 5.2| 7.6| 9.0| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|