Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(17) station Sydney RO (Observatory Hill) 45 years (1967-2011)| | BoM 66062 (WMO 94768) -33.86° latitude 151.21° longitude 40.2 m alt| | | |It is now 04-Jul-2013 00:26:55 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/17/SY_17_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/17/SY_17_DB.txt (Dry Design Day)| | B: CZ0512_NatHERS_1967-2011_w.txt => NEW33/17/SY_17_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/17/SY_17_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 31.9 °C Design DB = mean of 10th highest 3PM each year + (std dev * 2.14) => this Design DB was exceeded 9.9 days/year (incl std dev 3.2 days/year). 32.1 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.7 days/year (incl std dev 3.2 days/year). Design drybulb changes 2.7 °C per century (linear regression R² 0.25) ~> 33.7 °C mid century. 22.6 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.87) => this Design WB was exceeded 10.2 days/year (incl std dev 3.7 days/year). 22.8 ° 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 3.5 days/year). Design wetbulb changes 0.8 °C per century (linear regression R²=0.22) ~> 23.2 °C mid century. 6.8 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.94) => this Heating DB was insufficient 10.1 days/year (incl std dev 3.8 days/year). 6.5 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.8 days/year (incl std dev 4.2 days/year). Design heating changes 1.0 °C per century (linear regression R²=0.25) ~> 7.1 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:32 followed by maximum temperature at 15:00. Nighttime cooling rate 0.352 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 04:02 ~ Max at 14:48 Nighttime cooling rate 0.310 °/hr from 19:47 to 07:22 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -4:35 ~ Max at 16:06 Nighttime cooling rate 0.236 °/hr from 19:45 to 06:35 (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 | | 31.9 DDB / 19.1 CWB | 26.0 CDB / 22.6 DWB | 6.8 DB | 9.5 DB| 25.1 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.33 % | 12.13 % | 3.75 % | 0.42 % | 0.35 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 12.30 % | 3.90 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.72 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=129) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 6691| 32.7| 20.1| 12.6| 14:48| 04:02| |+/- 1367|+/- 1.4|+/- 2.6|+/- 2.7|+/-01:42|+/-05:10| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=433) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6169| 22.7| 19.3| 3.4| 16:06| -4:35| |+/- 1749|+/- 0.7|+/- 1.6|+/- 1.5|+/-04:00|+/-09:06| +/- 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 | | 32.6 / 23.0 | 34.7 / 23.3 || 6.6 | 7.6 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 31.4 DDB / 19.1 CWB | 26.2 CDB / 22.7 DWB | 7.0 DB | 0.4 % | 29.0 DDB / 19.5 CWB | 25.5 CDB / 22.1 DWB | 7.8 DB | 1.0 % | 27.3 DDB / 19.5 CWB | 24.9 CDB / 21.5 DWB | 8.5 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 288 | 686 | 78 | 20 | mean annual degrees days |+/- 37 |+/- 63 |+/- 20 |+/- 8 | +/- 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| | 1869 | 489 | 234 | 2 | mean annual degrees hours |+/- 488 |+/- 188 |+/- 144 |+/- 5 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.5| 22.6| 21.4| 18.9| 15.8| 13.3| 12.5| 13.8| 16.0| 18.0| 19.5| 21.4| Average Temperature (DB) | 0.8| 0.8| 0.7| 0.8| 0.7| 0.7| 0.6| 0.8| 1.0| 0.9| 0.9| 1.0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 8| 110| 655| 1527| 2046| 1503| 733| 244| 75| 8| HD-Hr base 15 °C | 1| 1| 14| 74| 219| 349| 345| 299| 263| 123| 70| 13| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 27| 24| 114| 600| 1858| 3240| 3928| 3148| 1926| 1019| 460| 127| HD-Hr base 18 °C | 30| 27| 86| 235| 385| 481| 418| 420| 470| 294| 246| 100| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 449| 409| 230| 69| 6| 0| 0| 5| 50| 136| 178| 338| CD-Hr base 24 °C | 199| 209| 117| 67| 9| 0| 0| 19| 53| 109| 141| 212| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 116| 93| 38| 12| 0| 0| 0| 1| 12| 49| 63| 105| CD-Hr base 27 °C | 85| 87| 37| 24| 0| 0| 0| 4| 19| 51| 69| 95| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 79| 104| 27| 1| 0| 0| 0| 0| 0| 0| 2| 22| NECD-Hr base 21 °C | 61| 96| 32| 3| 0| 0| 0| 0| 1| 0| 3| 30| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 2| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 1| 4| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.4| 18.7| 17.4| 14.9| 12.2| 9.9| 8.6| 9.3| 11.1| 13.3| 15.1| 16.9| Average Wet Bulb Temp (WB) | 0.9| 0.9| 0.9| 1.0| 0.9| 0.9| 0.9| 0.9| 0.9| 0.8| 1.1| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 3.37% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 34.5| 33.3| 31.2| 28.5| 24.9| 21.6| 21.6| 23.8| 28.3| 31.5| 32.6| 33.8| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 31.8| 31.2| 29.2| 27.7| 24.3| 21.2| 21.1| 23.2| 27.2| 30.6| 30.4| 32.0| Design maximum DB | 23.5| 23.7| 22.4| 20.1| 18.0| 15.9| 14.5| 16.0| 18.4| 20.1| 21.2| 22.5| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 15.9| 16.2| 14.1| 11.1| 8.4| 6.5| 5.5| 6.2| 7.9| 9.8| 11.8| 14.2| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 5.90% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.3| 23.6| 22.2| 20.4| 18.0| 15.7| 14.4| 15.5| 17.6| 19.3| 20.9| 22.3| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.2| 22.7| 21.4| 19.3| 17.2| 14.8| 13.6| 14.3| 16.4| 18.0| 19.8| 21.3| Design maximum WB | 21.1| 21.4| 20.0| 17.6| 15.4| 13.1| 11.4| 12.2| 14.2| 16.2| 18.3| 19.9| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.6| 12.6| 9.8| 7.4| 5.5| 3.6| 3.1| 3.2| 4.4| 6.2| 7.8| 9.3| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|