Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(23) station Launceston (Ti Tree Bend) 31 years (1981-2011)| | BoM 91237 (WMO 94969) -41.42° latitude 147.12° longitude 5.0 m alt| | | |It is now 04-Jul-2013 01:06:16 -> computational time was 5 minutes| | OUTPUTS | | INPUTS => NEW33/23/LT_23_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/23/LT_23_DB.txt (Dry Design Day)| | B: CZ0707_NatHERS_1981-2011_w.txt => NEW33/23/LT_23_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/23/LT_23_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 28.4 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.31) => this Design DB was exceeded 10.2 days/year (incl std dev 3.7 days/year). 28.5 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.2 days/year (incl std dev 3.4 days/year). Design drybulb changes 2.3 °C per century (linear regression R² 0.19) ~> 29.7 °C mid century. 19.6 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.18) => this Design WB was exceeded 10.1 days/year (incl std dev 4.3 days/year). 19.9 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 7.8 days/year (incl std dev 3.5 days/year). Design wetbulb changes -1.3 °C per century (linear regression R²=-0.09) ~> 19.2 °C mid century. -0.6 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.98) => this Heating DB was insufficient 10.3 days/year (incl std dev 5.4 days/year). -1.2 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 8.7 days/year (incl std dev 4.0 days/year). Design heating changes -4.0 °C per century (linear regression R²=-0.53) ~> -3.3 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 03:20 followed by maximum temperature at 15:07. Nighttime cooling rate 0.481 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:11 ~ Max at 15:30 Nighttime cooling rate 0.580 °/hr from 19:50 to -Inf:NaN (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 00:08 ~ Max at 15:00 Nighttime cooling rate 0.571 °/hr from Inf:NaN to -Inf:NaN (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 | | 28.4 DDB / 17.4 CWB | 24.5 CDB / 19.6 DWB | -0.6 DB |10.2 DB| 29.0 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.28 % | 1.78 % | 2.00 % | 0.24 % | 0.31 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 1.90 % | 2.08 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.47 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=164) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 6647| 28.6| 14.6| 13.9| 15:30| 05:11| |+/- 1510|+/- 0.7|+/- 2.6|+/- 2.6|+/-00:54|+/-03:56| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=196) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5726| 19.6| 13.0| 6.6| 15:00| 00:08| |+/- 2068|+/- 0.6|+/- 2.6|+/- 2.5|+/-02:24|+/-08:04| +/- 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 | | 28.7 / 19.6 | 30.0 / 20.3 || -0.7 | -0.3 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 27.9 DDB / 17.2 CWB | 24.1 CDB / 19.1 DWB | -0.3 DB | 0.4 % | 26.1 DDB / 16.6 CWB | 23.2 CDB / 18.2 DWB | 0.7 DB | 1.0 % | 24.6 DDB / 15.8 CWB | 22.2 CDB / 17.3 DWB | 1.8 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 1305 | 2093 | 19 | 4 | mean annual degrees days |+/- 92 |+/- 112 |+/- 9 |+/- 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| | 463 | 95 | 6 | 1 | mean annual degrees hours |+/- 215 |+/- 70 |+/- 11 |+/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 17.8| 17.9| 15.8| 12.6| 10.0| 7.7| 7.3| 8.4| 10.2| 12.1| 14.5| 16.3| Average Temperature (DB) | 1.2| 1.1| 1.0| 1.0| 0.9| 0.9| 0.6| 0.8| 0.8| 0.6| 1.0| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 556| 476| 1115| 2203| 3664| 5037| 5467| 4663| 3420| 2457| 1373| 880| HD-Hr base 15 °C | 284| 189| 341| 503| 589| 588| 434| 554| 459| 319| 371| 259| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1402| 1232| 2274| 3821| 5677| 7091| 7598| 6782| 5390| 4259| 2732| 1979| HD-Hr base 18 °C | 482| 341| 493| 627| 623| 592| 439| 564| 508| 395| 509| 412| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 167| 152| 66| 2| 0| 0| 0| 0| 0| 2| 19| 55| CD-Hr base 24 °C | 116| 104| 56| 4| 0| 0| 0| 0| 0| 4| 24| 52| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 42| 30| 10| 0| 0| 0| 0| 0| 0| 0| 2| 10| CD-Hr base 27 °C | 51| 33| 14| 0| 0| 0| 0| 0| 0| 0| 5| 17| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2| 1| 2| 0| 0| 0| 0| 0| 0| 0| 0| 1| NECD-Hr base 21 °C | 8| 3| 7| 1| 0| 0| 0| 0| 0| 0| 0| 2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 2| 0| 2| 0| 0| 0| 0| 0| 0| 0| 0| 1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 12.6| 12.8| 11.6| 9.7| 7.8| 6.0| 5.5| 6.2| 7.2| 8.4| 10.1| 11.3| Average Wet Bulb Temp (WB) | 1.1| 1.1| 1.1| 1.0| 0.9| 1.1| 0.8| 0.9| 0.9| 0.7| 1.1| 1.0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 6.56% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 30.5| 30.0| 28.3| 23.6| 19.7| 17.2| 16.2| 17.1| 19.5| 23.3| 26.3| 28.1| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 28.5| 28.3| 26.7| 22.2| 18.4| 16.0| 15.4| 15.9| 17.8| 21.0| 24.2| 26.0| Design maximum DB | 18.3| 17.8| 16.4| 13.4| 11.9| 10.0| 9.3| 10.3| 11.0| 12.6| 14.7| 16.1| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 6.2| 6.7| 4.2| 2.1| 0.2| -1.5| -1.7| -0.6| 0.7| 2.0| 3.6| 4.8| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 5.83% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.5| 20.4| 19.7| 16.8| 14.9| 13.0| 12.0| 12.2| 13.4| 15.4| 17.5| 18.8| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.0| 19.7| 18.2| 16.4| 14.3| 12.4| 11.5| 11.7| 12.7| 14.3| 16.6| 17.8| Design maximum WB | 15.6| 15.9| 14.9| 12.4| 10.6| 9.4| 8.0| 8.8| 9.5| 10.9| 12.8| 13.9| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4.6| 5.1| 3.0| 1.4| -0.3| -1.7| -1.9| -1.1| 0.1| 1.0| 2.5| 3.9| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|