Document DDDERngQDbk5BoRoXxjJ2aBbM

166 Col. 1 Provtoce of Canada CeL 2 Station** CHAPTER 12 1960 Guide Table 2 .... Winter Climatic Conditions*--Canada Col. 3 Bevufioa* R Cot. 4 Period of Record* Col. 5 lowed Temp m Itacofd* Col. 6 Col. 7 Col;8 Col. 9 Col. 10 itrerope Aaooal Mia. Teop* Wafer D*s`gn Temp* --f cof. n Ap Wmd Speed' F F 1% 2H% s% 10% Mph B. C............. Edmonton................... A Grande Prairie.......... A Lethbridge.................. A McMurray...................A Medicine Hat.............A Port Nelson................ A Penticton.................... A Prince George............A Prince Rupert............C Vancouver................. A Victoria........................C Churchill..................... A The Pas....................... A Winnipeg..................... A N. B............ Nfld............. Fredericton.................C Moncton...................... A Saint John.................. C Gander....................... A Goose Bay...................A St. John's....................A N.W.T........ NB........ Aklavik........................ C Fort Norman ...........C Frobisher..................... A Resolute...................... C Yellowknife................ A Halifax.........................A Sydney......................... A Yarmouth.................... A P. E. I......... Hamilton..................... C Kapuskasmg.............. A Kingston...................... C Kitchener.................... C London......................... A North Bay...................A Ottawa......................... A Peterborough............. C Sioux Lookout........... A Sudbury.......................C Timmins...................... C Toronto........................C Toronto........................A Windsor..................;.. A Charlottetown......C Knob Lake..................A Mont Joli.................... A Montreal......................C Montreal......................A Port Harrison............C Quebec City............. C Seven Islands............ A Sherbrooke..................C Three Rivers..............C Y. T............ Regina..........................A Saskatoon....................A Swift Current............ A Whitehorse..................A 2219 2190 3018 1216 2365 1230 1121 2218 170 22 228 115 894 786 164 248 119 482 144 463 30 300 68 56 682 136 197 136 303 752 340 1100 912 1210 339 648 1227 837 1100 379 578 637 74 1605 150 187 98 66 296 190 620 50 1884 1645 2677 2289 1921-1950 1942-1950 1921-1950 1921-1950 1921-1950 1938-1950 1921-1950 1921-1950 1921-1950 1938-1950 1921-1950 1932-1950 1921-1950 1921-1950 1923-1950 1921-1950 1921-1950 1937-1950 1942-1950 1926-1950 1927-1950 1925-1950 1942-1950 1948-1950 1942-1950 1944-1950 1921-1950 1921-1950 1939-1950 1921-1950 1921-1950 1921-1950 1921-1950 1925-1950 1921-1950 1921-1950 1931-1950 1921-1950 1921-1950 1921-1950 1938-1950 1921-1950 1921-1950 1948-1950 1943-1950 1921-1950 1942-1950 1942-1950 1921-1950 1944-1950 1921-1950 1921-1950 1921-1950 1921-1950 1921-1950 1941-1950 -55 -62 -45 -64 -49 -61 -16 -58 -3 0 6 -50 -54 -44 -38 -36 -21 -16 -35 -10 -62 -65 -49 -55 -60 -11 -23 ' -11 -17 -53 -31 -29 -27 -46 -38 -38 -50 -45 -55 -- 22 -24 -to -23 -59 -28 -29 -28 -49 -32 -43 -39 --43 -54 -54 -54 -62 -39 -47 -32 -51 -34 -47 -1 -42 12 13 20 -43 -42 -35 -24 -23 -12 -10 -30 -2 -42 -54 -44 -53 -51 -9 1 -6 -42 -17 -11 -11 -33 -26 -21 -39 -34 -7 -13 -2 -11 -48 -16 -20 -42 -19 -24 -24 -39 -41 -34 -51 -39 -43 -38 -48 -41 -33 -39 -32 -42 -35 -29 -34 -28 -37 -31 -21 -27 -19 -30 -22 -42 -14 -43 5 8 12 -38 -6 -32 8 11 15 -33 -1 -25 12 16 19 -28 4 -16 18 21 25 -43 -43 -33 -42 -39 -29 -40 -30 -25 -37 -26 -21 -9 -6 -3 -11 -8 -5 -6 -3 0 2 0 5 -6 -29 -l --50 -46 -51 -45 -49 --3 -26 1 -46 -42 -47 -42 -47 0 -24 4 -43 -39 -43 -40 -45 4 -20 7 -39 -35 -39 -36 -41 -3 2 5 -7 1 4 8 4 7 10 13 -4 0 -34 -30 -- 15j -11 -8 -3 -5 -1 -24 -20 -18 -15 -15 -11 -38 -33 -21 -17 -30 -26 -4 0 --9 -4 03 -6 -3 5 -27 -6 2 3 -16 -11 -6 -29 -12 -22 5 1 7 0 10 -22 -1 7 8 -11 -7 -1 -24 -5 -17 10, 6 11 4 -44 -14 -12 -14 -43 -- 16 -- 23 -15 -17 -40 -11 -9 -11 -39 -12 -20 -12 -13 -34 -8 -6 -8 -35 -9 -17 -9 -10 -30 -3 -2 -4 -31 -4 -12 -5 -5 -39 -45 -39 -34 -37 -33 -30 -33 -29 -25 -26 -24 -49 -43 -37 -26 7.6 7.9 15.0 9.0 3.7 7.2 8.0 7.7 12.3 14.7 6.4 12.0 9.2 14.9 13.8 17.2 10.3 19.3 9.2 12.4 13: i 13.5 9.6 10.0 10.8 11.9 11.3 11.1 8.5 14.1 12.1 12.3 11.3 13.3 12.3 13.1 13.4 12.4 8.2 12.1 9.7 14.6 8.7 . Heating Load 167 - Notes for Table 2 .... Winter Climatic Conditions* Canada Data compiled from the Climatological Atlaa of Canada for the years indicated. b Col. 2. The stations followed by letter A are airport stations; all others are city office stations and are followed by letter C. e Col. 3. The elevations listed are ground elevations of the station. <* Col- 4. The periods of record indicated apply only to the lowest temperature ever recorded shown in Col. 5, and generally extend from a summer month of the first year indicated through the spring months of the last year indicated. Average of readings of one lowest temperature obtained for each year for period of record. For Canada, in some cases, more t-hftn one location have been used. i Most of the wind speeds are based on periods ending in 1917 which are somewhat shorter than the periods for the minimum temperatures. The three months, December, January, and February were used. The winter design temperatures shown in columns 7-10 inclusive for Canadian cities are the Fahrenheit temperature values at or below which 1, 2)4.6, and 10 percent, respectively, of the January hourly outdoor temperatures occur for the 10 years from 1941 to 1950- The tabulated values are based on hourly temperature observations for some of the cities and upon the difference between the mean monthly temperature and the design temperature for the remainder of the cities listed. decision on outdoor design temperature, that if the indooroutdoor Hwdgu temperature difference is exceeded, the indoor temperature will fall. The question is to determine how large a drop will occur and whether it can be tolerated. Finally, there is a factor, perhaps intangible, that should not be ignored. It is the performance expected by the owner from the system. In order to judge whether expected perform ance can be assured the designer needs a full understanding of the haste on which the capacities of all the system com ponents are derived or determined, the limits of accuracy of published performance data, and the accelerating capability of certain types of equipment. There is no substitute for experienced engineering judgment in problems of this type. Canadian Winter Design Temperatures Canadian winter design temperatures are based on tem perature frequencies and show the percentage of time that the temperature might be expected to fall below certain values. Since January is normally the coldest month.of-tEe winter in most of Canada, and to simplify the analysis and understanding, these values are based on January data only.* In using these values to calculate the beat loss of a building, the engineer is thus designing for the coldest month. Winter design temperature on a 2Yt percent bads is the temperature value expressed in degrees Fahrenheit at or be low Which 2Vt percent of the January outdoor temperatures occur. It is suggested that this 2Yi percent basis value be normally used in Canada. However, the engineer has the opportunity of selecting the 5 or 10 percent baas value if it is not so important that the pre-selected indoor design tem perature be maintained, or on (he other hand the 1 percent basis value if cost is not as important as the maintenance of indoor temperatures. INDOOR TEMPERATURES The indoor air temperature that must be maintained within a building is understood to be the dry-bulb temperature at the breathing line, 5 ft above the floor, or at the seating level, 30 in. above the floor, and at a location where the tem perature sensing device is not exposed to a condition of ab normal heat gain or heat loss. Indoor air temperatures usually specified, vary in accordance with the intended use of the building. Table 3 presents values that conform to good practice. The proper dry-bulb temperature to be maintained de pends -upon the relative humidity and air motion, as ex plained in Chapter 6. In other words, a person may feel warm or cool at the same dry-bulb temperature, depending on theirelative humidity and air motion. The optimum winter Table 3 .... Winter Indoor Dry-Bulb Temperatures Usually Specified* type of fiefldino Schools-- Classrooms............................... Assembly rooms..................... Gymnasiums............................ Toilets and baths................... Wardrobe and locker rooms Kitchens.................................... Dining and lunch rooms___ Playrooms................................ Natatoriums............................ 72-74 68-72 55-65 70 65-68 66 65-70 60-65 75 Hospitals-- Private rooms................... Private rooms (surgical).. Operating rooms................ Wards..................................... Kitchens and laundries... Toilets................................... Bathrooms............................ THEATERS-- Seating space. Lounge rooms. Toilets.............. 72-74 70-80 70-95 72-74 70-80 68-72 68-72 68 Hotels-- Bedrooms and baths..... Dining rooms....................... Kitchens and laundries... Ballrooms............................. Toilets and service rooms. 75 72 66 5-6! 68 Hokes. 73-75 PUBUC BULOINCS................................ Warm Aib Baths............................... Steak Bates......................................... Factories and Machine Shops Foundries and Boiler Shops. Paint Shops........................................... 72-74 120 110 60-65 50-60 80 * Tbe too*! comfortable dry-bulb temperature to bo maintained depcttdt on tbe relative humidity ad air isotcoa. There three {acton considered tecetber constitute what a termed tbe tgtetim Umptratun. (See Chapter a) When rela tive humidity it not oontroQed veperetely, optimum dry-bulb temperature lor comfort will be alichtly hitler than ahoira in Table I.