Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(68) station Launceston Airport 45 years (1967-2011)| | BoM 91311 (WMO 95966) -41.55° latitude 147.21° longitude 168.4 m alt| | | |It is now 04-Jul-2013 05:46:51 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/68/LU_68_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/68/LU_68_DB.txt (Dry Design Day)| | B: CZ0708_NatHERS_1967-2011_w.txt => NEW33/68/LU_68_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/68/LU_68_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 28.2 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.46) => this Design DB was exceeded 10.2 days/year (incl std dev 3.9 days/year). 28.2 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 10.2 days/year (incl std dev 3.9 days/year). Design drybulb changes 1.9 °C per century (linear regression R² 0.21) ~> 29.3 °C mid century. 18.5 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.65) => this Design WB was exceeded 9.8 days/year (incl std dev 4.4 days/year). 18.5 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.8 days/year (incl std dev 4.4 days/year). Design wetbulb changes 0.5 °C per century (linear regression R²=0.08) ~> 18.8 °C mid century. -1.0 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.90) => this Heating DB was insufficient 9.9 days/year (incl std dev 3.3 days/year). -1.8 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.5 days/year (incl std dev 3.8 days/year). Design heating changes -1.1 °C per century (linear regression R²=-0.23) ~> -2.5 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 03:13 followed by maximum temperature at 15:19. Nighttime cooling rate 0.421 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:10 ~ Max at 15:24 Nighttime cooling rate 0.688 °/hr from 20:4 to 06:44 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -2:58 ~ Max at 15:24 Nighttime cooling rate 0.524 °/hr from 19:51 to 06:40 (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 | | 28.2 DDB / 16.9 CWB | 23.9 CDB / 18.5 DWB | -1.0 DB |11.9 DB| 29.2 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.27 % | 1.45 % | 1.81 % | 0.32 % | 0.53 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 1.56 % | 1.93 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.52 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=181) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 6890| 28.5| 13.0| 15.5| 15:24| 05:10| |+/- 1350|+/- 0.8|+/- 3.1|+/- 3.2|+/-00:54|+/-02:22| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=324) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5426| 18.7| 12.8| 5.8| 15:24| -2:58| |+/- 1869|+/- 0.6|+/- 2.2|+/- 2.1|+/-03:00|+/-08:23| +/- 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 | | 28.4 / 18.7 | 30.1 / 19.2 || -1.7 | -0.1 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 27.5 DDB / 16.7 CWB | 23.7 CDB / 18.3 DWB | -1.2 DB | 0.4 % | 25.4 DDB / 15.8 CWB | 22.4 CDB / 17.4 DWB | -0.1 DB | 1.0 % | 23.7 DDB / 15.0 CWB | 21.4 CDB / 16.5 DWB | 1.0 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 1561 | 2420 | 15 | 4 | mean annual degrees days |+/- 91 |+/- 107 |+/- 8 |+/- 3 | +/- 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| | 354 | 85 | 0 | 0 | mean annual degrees hours |+/- 188 |+/- 68 |+/- 1 |+/- 0 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.5| 16.7| 14.8| 11.8| 9.2| 7.0| 6.6| 7.4| 8.9| 10.7| 12.9| 14.7| Average Temperature (DB) | 1.2| 1.1| 0.9| 0.9| 0.8| 0.8| 0.7| 0.7| 0.7| 0.6| 0.9| 1.0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 901| 769| 1396| 2497| 4117| 5461| 5991| 5364| 4239| 3239| 2072| 1427| HD-Hr base 15 °C | 295| 244| 327| 473| 574| 577| 534| 521| 480| 354| 408| 314| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1996| 1733| 2754| 4271| 6213| 7530| 8130| 7499| 6275| 5189| 3682| 2808| HD-Hr base 18 °C | 476| 398| 443| 566| 595| 577| 534| 524| 501| 405| 527| 468| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 134| 120| 40| 1| 0| 0| 0| 0| 0| 1| 12| 46| CD-Hr base 24 °C | 116| 90| 44| 4| 0| 0| 0| 0| 0| 3| 19| 50| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 41| 26| 6| 0| 0| 0| 0| 0| 0| 0| 2| 11| CD-Hr base 27 °C | 54| 31| 14| 0| 0| 0| 0| 0| 0| 0| 4| 19| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 21 °C | 0| 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.7| 12.0| 10.8| 9.1| 7.3| 5.5| 5.1| 5.6| 6.5| 7.7| 9.3| 10.4| Average Wet Bulb Temp (WB) | 1.0| 1.1| 1.0| 0.9| 0.9| 0.9| 0.8| 0.8| 0.8| 0.6| 1.0| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 6.45% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 30.2| 29.8| 27.5| 22.6| 18.0| 14.6| 13.8| 15.3| 18.0| 22.0| 25.3| 27.7| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 28.3| 28.1| 26.0| 21.2| 17.0| 13.8| 13.0| 14.4| 16.5| 20.0| 23.1| 25.5| Design maximum DB | 16.4| 17.1| 15.6| 13.6| 12.2| 10.3| 9.5| 9.7| 10.2| 11.6| 13.3| 14.4| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4.5| 5.1| 2.8| 0.8| -1.0| -2.6| -2.6| -1.8| -0.8| 0.2| 1.8| 3.2| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 4.48% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.9| 19.3| 18.1| 15.9| 14.0| 12.0| 10.9| 11.4| 12.6| 15.0| 16.8| 17.7| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.5| 18.6| 17.6| 15.3| 13.5| 11.4| 10.4| 10.9| 12.0| 14.1| 16.2| 17.0| Design maximum WB | 15.5| 16.1| 14.9| 13.1| 11.7| 9.8| 9.0| 9.0| 9.7| 10.9| 12.6| 13.8| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2.9| 3.2| 1.5| -0.0| -1.5| -3.0| -3.0| -2.3| -1.5| -0.9| 0.6| 1.8| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|