Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(76) station Tamworth 45 years (1967-2011)| | BoM 55325 (WMO 95762) -31.07° latitude 150.84° longitude 395.9 m alt| | | |It is now 04-Jul-2013 06:30:28 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/76/TA_76_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/76/TA_76_DB.txt (Dry Design Day)| | B: CZ0407_NatHERS_1967-2011_w.txt => NEW33/76/TA_76_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/76/TA_76_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 36.3 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.27) => this Design DB was exceeded 9.9 days/year (incl std dev 5.1 days/year). 36.6 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.3 days/year (incl std dev 4.9 days/year). Design drybulb changes 5.2 °C per century (linear regression R² 0.42) ~> 39.7 °C mid century. 22.3 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.55) => this Design WB was exceeded 9.6 days/year (incl std dev 6.1 days/year). 22.4 ° 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 5.8 days/year). Design wetbulb changes 0.9 °C per century (linear regression R²=0.10) ~> 22.9 °C mid century. -1.0 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.00) => this Heating DB was insufficient 9.8 days/year (incl std dev 5.3 days/year). -1.7 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 10.1 days/year (incl std dev 5.0 days/year). Design heating changes -6.2 °C per century (linear regression R²=-0.66) ~> -5.5 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:20 followed by maximum temperature at 15:37. Nighttime cooling rate 0.682 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:41 ~ Max at 16:00 Nighttime cooling rate 1.002 °/hr from 19:48 to 06:49 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 00:42 ~ Max at 15:06 Nighttime cooling rate 0.552 °/hr from 19:60 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 | | 36.3 DDB / 18.6 CWB | 28.0 CDB / 22.3 DWB | -1.0 DB |13.4 DB| 37.3 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.21 % | 6.15 % | 7.76 % | 0.19 % | 0.25 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 6.26 % | 7.87 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.40 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=190) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7836| 36.7| 20.1| 16.6| 16:00| 05:41| |+/- 824|+/- 0.8|+/- 2.7|+/- 2.9|+/-01:12|+/-00:59| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=188) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6283| 22.5| 17.7| 4.7| 15:06| 00:42| |+/- 1814|+/- 0.8|+/- 2.1|+/- 2.1|+/-03:00|+/-07:09| +/- 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 | | 36.1 / 22.1 | 37.3 / 22.7 || -1.1 | 2.1 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 35.3 DDB / 18.5 CWB | 27.9 CDB / 21.7 DWB | -0.5 DB | 0.4 % | 33.8 DDB / 18.2 CWB | 27.2 CDB / 20.9 DWB | 0.9 DB | 1.0 % | 32.2 DDB / 17.9 CWB | 26.8 CDB / 20.1 DWB | 2.1 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 809 | 1321 | 272 | 117 | mean annual degrees days |+/- 71 |+/- 92 |+/- 66 |+/- 41 | +/- 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| | 6518 | 2806 | 70 | 4 | mean annual degrees hours |+/- 1582 |+/- 990 |+/- 119 |+/- 24 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.3| 23.6| 21.3| 17.2| 12.9| 9.7| 8.6| 10.1| 13.3| 17.1| 20.2| 22.8| Average Temperature (DB) | 1.4| 1.3| 1.2| 1.3| 0.9| 1.0| 0.9| 1.2| 1.2| 1.3| 1.7| 1.5| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 39| 36| 171| 852| 2298| 3795| 4631| 3861| 2231| 1016| 361| 118| HD-Hr base 15 °C | 47| 42| 107| 336| 487| 621| 606| 609| 438| 307| 204| 73| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 191| 189| 590| 1797| 3858| 5670| 6640| 5716| 3675| 2025| 937| 407| HD-Hr base 18 °C | 139| 133| 234| 486| 565| 688| 653| 722| 570| 471| 375| 185| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1775| 1334| 831| 183| 6| 0| 0| 3| 54| 266| 702| 1364| CD-Hr base 24 °C | 589| 458| 362| 141| 13| 0| 0| 12| 72| 201| 469| 566| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 882| 602| 294| 29| 0| 0| 0| 0| 11| 76| 281| 632| CD-Hr base 27 °C | 403| 307| 209| 41| 1| 0| 0| 1| 22| 89| 279| 374| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21| 26| 10| 8| 0| 0| 0| 0| 0| 0| 1| 4| NECD-Hr base 21 °C | 31| 44| 44| 53| 0| 0| 0| 0| 0| 0| 5| 9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1| 0| 2| 2| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 3| 0| 11| 13| 0| 0| 0| 0| 0| 0| 1| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.9| 16.8| 14.8| 11.8| 9.1| 6.9| 5.7| 6.4| 8.7| 11.4| 13.6| 15.3| Average Wet Bulb Temp (WB) | 1.0| 1.1| 1.0| 1.2| 1.2| 1.1| 1.2| 1.1| 1.2| 0.9| 1.0| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.52% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 36.9| 35.5| 33.5| 29.1| 24.8| 20.6| 20.2| 22.6| 27.3| 31.1| 33.8| 35.5| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 36.4| 35.3| 33.0| 28.8| 24.0| 20.0| 19.1| 22.1| 26.9| 30.2| 33.9| 35.2| Design maximum DB | 23.0| 22.9| 20.4| 16.7| 13.6| 11.0| 9.9| 11.0| 13.8| 16.8| 20.0| 21.8| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.7| 11.8| 8.5| 4.4| 0.8| -1.5| -2.4| -1.7| 0.6| 3.4| 6.7| 9.3| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.52% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.3| 22.1| 21.0| 18.3| 16.1| 14.2| 13.3| 14.0| 16.2| 18.4| 20.0| 21.2| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.1| 22.4| 21.0| 19.1| 16.4| 14.5| 13.4| 14.4| 16.4| 18.2| 19.8| 21.1| Design maximum WB | 20.1| 20.4| 18.5| 15.7| 13.2| 10.9| 10.0| 10.6| 12.7| 14.6| 17.1| 18.6| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 9.0| 9.8| 6.4| 2.9| -0.1| -2.1| -3.0| -2.4| -0.3| 2.1| 4.7| 6.8| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|