Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(27) station Mildura 45 years (1967-2011)| | BoM 76031 (WMO 94693) -34.24° latitude 142.09° longitude 52.8 m alt| | | |It is now 04-Jul-2013 01:33:02 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/27/MI_27_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/27/MI_27_DB.txt (Dry Design Day)| | B: CZ0413_NatHERS_1967-2011_w.txt => NEW33/27/MI_27_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/27/MI_27_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 39.8 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.48) => this Design DB was exceeded 9.9 days/year (incl std dev 4.2 days/year). 39.9 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.6 days/year (incl std dev 4.1 days/year). Design drybulb changes 2.4 °C per century (linear regression R² 0.20) ~> 41.4 °C mid century. 21.2 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.78) => this Design WB was exceeded 9.9 days/year (incl std dev 4.3 days/year). 21.4 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.3 days/year (incl std dev 4.1 days/year). Design wetbulb changes 0.7 °C per century (linear regression R²=0.09) ~> 21.8 °C mid century. 0.7 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.93) => this Heating DB was insufficient 10.2 days/year (incl std dev 4.6 days/year). 0.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.9 days/year (incl std dev 4.7 days/year). Design heating changes -1.9 °C per century (linear regression R²=-0.26) ~> -0.8 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:48 followed by maximum temperature at 16:32. Nighttime cooling rate 0.768 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 04:38 ~ Max at 16:00 Nighttime cooling rate 1.079 °/hr from 19:55 to 07:26 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -2:57 ~ Max at 16:24 Nighttime cooling rate 0.726 °/hr from 19:57 to 06:50 (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 | | 39.8 DDB / 18.9 CWB | 29.0 CDB / 21.2 DWB | 0.7 DB |14.9 DB| 39.1 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.30 % | 2.61 % | 8.05 % | 0.46 % | 0.25 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 2.71 % | 8.33 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.74 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=155) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7770| 40.5| 22.3| 18.2| 16:00| 04:38| |+/- 1075|+/- 0.8|+/- 3.1|+/- 3.1|+/-01:18|+/-05:03| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=245) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6301| 21.5| 16.4| 5.1| 16:24| -2:57| |+/- 2047|+/- 0.8|+/- 2.5|+/- 2.2|+/-04:18|+/-08:42| +/- 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 | | 40.1 / 21.9 | 41.4 / 22.2 || 0.7 | 2.0 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 39.2 DDB / 18.7 CWB | 29.0 CDB / 21.4 DWB | 1.2 DB | 0.4 % | 37.0 DDB / 18.2 CWB | 29.6 CDB / 20.3 DWB | 2.6 DB | 1.0 % | 34.9 DDB / 17.6 CWB | 29.9 CDB / 19.4 DWB | 3.8 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 750 | 1295 | 352 | 189 | mean annual degrees days |+/- 55 |+/- 74 |+/- 65 |+/- 46 | +/- 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| | 8452 | 4531 | 48 | 1 | mean annual degrees hours |+/- 1569 |+/- 1107 |+/- 66 |+/- 3 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.7| 24.4| 21.0| 16.7| 12.9| 10.2| 9.6| 11.1| 13.8| 16.9| 20.4| 22.8| Average Temperature (DB) | 1.8| 1.4| 1.3| 1.2| 0.9| 0.9| 0.7| 1.0| 1.2| 1.1| 1.5| 1.2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 75| 74| 315| 1010| 2235| 3440| 3931| 3208| 1973| 1102| 455| 189| HD-Hr base 15 °C | 58| 52| 143| 329| 418| 544| 436| 464| 395| 220| 156| 80| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 328| 311| 851| 2041| 3877| 5366| 5956| 5053| 3430| 2162| 1094| 600| HD-Hr base 18 °C | 173| 146| 283| 471| 516| 601| 474| 604| 552| 362| 282| 168| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2229| 1941| 1032| 260| 19| 0| 1| 11| 92| 359| 940| 1569| CD-Hr base 24 °C | 806| 535| 402| 170| 26| 0| 3| 23| 86| 200| 465| 493| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1298| 1117| 511| 86| 1| 0| 0| 1| 28| 148| 482| 857| CD-Hr base 27 °C | 597| 398| 270| 83| 3| 0| 0| 4| 36| 110| 323| 347| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23| 21| 1| 0| 0| 0| 0| 0| 0| 0| 0| 3| NECD-Hr base 21 °C | 33| 47| 2| 0| 0| 0| 0| 0| 0| 0| 0| 7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 1| 2| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 14.6| 14.7| 13.1| 11.0| 9.2| 7.5| 6.8| 7.2| 8.7| 10.2| 12.0| 13.2| Average Wet Bulb Temp (WB) | 1.5| 1.3| 1.3| 1.1| 0.9| 1.0| 0.8| 0.7| 0.8| 0.7| 0.9| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 6.81% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 41.3| 40.3| 36.9| 31.7| 25.6| 21.1| 20.2| 23.9| 29.5| 34.2| 37.7| 39.8| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 39.9| 39.0| 35.3| 30.1| 24.6| 19.5| 18.9| 22.3| 27.3| 31.3| 35.5| 37.4| Design maximum DB | 25.0| 24.5| 21.0| 17.3| 14.2| 11.3| 10.4| 11.2| 14.3| 17.6| 21.3| 22.8| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 10.8| 10.9| 7.9| 4.8| 1.8| -0.1| -0.3| 0.6| 2.0| 4.3| 6.8| 9.1| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 4.16% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.0| 21.7| 20.2| 17.8| 15.8| 13.7| 12.7| 13.6| 15.7| 17.5| 19.5| 20.9| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21.3| 21.2| 19.7| 17.2| 15.5| 13.2| 12.2| 12.8| 14.9| 16.6| 18.4| 19.7| Design maximum WB | 19.2| 19.0| 17.4| 14.9| 12.8| 10.7| 9.6| 9.7| 11.5| 13.7| 16.0| 17.3| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 7.0| 7.1| 5.5| 3.5| 1.3| -0.3| -0.7| -0.0| 1.4| 2.8| 4.6| 5.9| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|