Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(42) station Meekatharra 45 years (1967-2011)| | BoM 7045 (WMO 94430) -26.61° latitude 118.54° longitude 519.0 m alt| | | |It is now 04-Jul-2013 03:10:10 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/42/MT_42_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/42/MT_42_DB.txt (Dry Design Day)| | B: CZ0402_NatHERS_1967-2011_w.txt => NEW33/42/MT_42_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/42/MT_42_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 42.0 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.53) => this Design DB was exceeded 10.8 days/year (incl std dev 5.2 days/year). 41.9 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 10.8 days/year (incl std dev 5.2 days/year). Design drybulb changes 2.7 °C per century (linear regression R² 0.40) ~> 43.5 °C mid century. 22.7 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.35) => this Design WB was exceeded 10.0 days/year (incl std dev 5.6 days/year). 22.5 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 11.4 days/year (incl std dev 6.2 days/year). Design wetbulb changes 3.1 °C per century (linear regression R²=0.33) ~> 24.4 °C mid century. 5.0 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.05) => this Heating DB was insufficient 10.2 days/year (incl std dev 4.7 days/year). 4.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.6 days/year (incl std dev 4.2 days/year). Design heating changes -0.7 °C per century (linear regression R²=-0.12) ~> 3.9 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 06:05 followed by maximum temperature at 15:54. Nighttime cooling rate 0.787 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 06:12 ~ Max at 15:48 Nighttime cooling rate 1.024 °/hr from 19:39 to 07:2 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -3:43 ~ Max at 17:36 Nighttime cooling rate 0.478 °/hr from 19:33 to 06:57 (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 | | 42.0 DDB / 18.2 CWB | 27.9 CDB / 22.7 DWB | 5.0 DB |12.4 DB| 37.0 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.17 % | 7.55 % | 27.25 % | 0.33 % | 0.40 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 7.63 % | 27.42 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.50 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=311) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 8099| 42.0| 27.5| 14.5| 15:48| 06:12| |+/- 794|+/- 0.6|+/- 1.9|+/- 1.8|+/-01:00|+/-02:11| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=152) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6272| 23.3| 19.7| 3.5| 17:36| -3:43| |+/- 1629|+/- 0.8|+/- 2.1|+/- 2.2|+/-04:48|+/-08:47| +/- 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 | | 41.7 / 23.0 | 42.4 / 23.0 || 4.6 | 7.4 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 41.2 DDB / 18.2 CWB | 27.9 CDB / 22.6 DWB | 5.1 DB | 0.4 % | 40.0 DDB / 18.0 CWB | 28.3 CDB / 21.6 DWB | 6.3 DB | 1.0 % | 38.8 DDB / 17.6 CWB | 29.4 CDB / 20.6 DWB | 7.4 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 274 | 559 | 967 | 581 | mean annual degrees days |+/- 48 |+/- 77 |+/- 122 |+/- 91 | +/- 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| | 23196 | 13950 | 149 | 5 | mean annual degrees hours |+/- 2931 |+/- 2183 |+/- 172 |+/- 11 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 31.5| 30.1| 27.5| 23.0| 17.8| 14.1| 13.2| 15.0| 18.6| 22.8| 26.1| 29.5| Average Temperature (DB) | 1.5| 2.0| 1.7| 1.6| 1.6| 0.9| 1.1| 1.4| 1.3| 1.7| 1.6| 1.3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 1| 4| 64| 619| 1535| 2063| 1487| 612| 167| 27| 1| HD-Hr base 15 °C | 2| 3| 12| 79| 320| 367| 467| 448| 237| 125| 36| 2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 6| 4| 39| 279| 1510| 2989| 3671| 2819| 1421| 539| 136| 15| HD-Hr base 18 °C | 16| 11| 56| 209| 556| 504| 616| 641| 395| 292| 116| 20| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 5540| 4203| 3170| 1226| 249| 8| 8| 78| 431| 1453| 2558| 4273| CD-Hr base 24 °C | 929| 1192| 916| 478| 225| 11| 13| 85| 231| 553| 674| 736| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 3731| 2692| 1848| 550| 70| 0| 0| 12| 145| 722| 1462| 2718| CD-Hr base 27 °C | 774| 979| 674| 281| 92| 1| 0| 20| 113| 351| 480| 578| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 48| 72| 19| 0| 0| 0| 0| 0| 0| 0| 0| 10| NECD-Hr base 21 °C | 86| 117| 51| 0| 0| 0| 0| 0| 0| 0| 1| 23| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2| 2| 1| 0| 0| 0| 0| 0| 0| 0| 0| 2| NECD-Hr base 24 °C | 7| 4| 3| 0| 0| 0| 0| 0| 0| 0| 0| 7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.5| 17.1| 15.4| 13.4| 10.6| 8.7| 7.7| 8.1| 9.4| 11.2| 13.0| 15.1| Average Wet Bulb Temp (WB) | 1.2| 1.2| 1.3| 1.2| 1.4| 1.1| 1.1| 1.0| 0.8| 0.9| 0.8| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.66% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 42.9| 41.6| 39.3| 34.9| 29.8| 24.8| 24.6| 28.0| 32.7| 36.8| 39.5| 41.6| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 42.1| 41.7| 39.3| 34.7| 30.3| 24.3| 24.2| 27.3| 31.7| 36.0| 38.7| 40.9| Design maximum DB | 29.7| 29.0| 27.0| 22.9| 18.5| 14.9| 13.7| 14.6| 17.2| 22.1| 25.4| 28.1| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.7| 18.1| 15.7| 11.5| 7.0| 4.5| 3.0| 4.2| 6.5| 9.3| 12.6| 16.3| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.83% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.4| 22.8| 21.5| 19.6| 17.5| 15.8| 15.0| 15.4| 15.7| 17.2| 18.8| 21.5| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.3| 22.8| 21.3| 19.2| 17.2| 15.2| 14.3| 14.5| 15.4| 16.9| 18.1| 20.4| Design maximum WB | 21.9| 22.2| 20.5| 18.2| 15.8| 13.9| 12.7| 12.0| 12.5| 14.5| 16.5| 19.8| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 9.8| 9.9| 8.8| 6.6| 3.6| 1.8| 0.6| 1.1| 2.3| 4.0| 6.1| 8.1| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|