Matsayin daidaitaccen zafin jiki

Yanayin ma'aunin ginin shine yanayin iska na waje lokacin da yawan zafi na ginin ya yi daidai da asarar zafi.^[1] Tushen zafi na ciki saboda Hasken lantarki, kayan aikin inji, zafi na jiki, da Hasken rana na iya rage buƙatar ƙarin dumama kodayake zafin jiki na waje na iya zama ƙasa da zafin jiki.

Matsayin ma'aunin gine-gine shine ainihin zafin jiki da ake buƙata don lissafin ranar digiri na dumama don tsammanin buƙatar makamashi na shekara-shekara don dumama gini. Matsayin ma'auni na zafin jiki shine sakamakon ƙirar gini da aiki maimakon yanayin yanayi na waje.

Internal and external heat gains and losses in a building.

Samun zafi na ciki da na waje da asarar a cikin gini.

Ma'anar lissafi

An bayyana ma'aunin ma'auni a lissafi kamar haka: Daidaitawa 1: tbalance = tthermostat - ⁠QIHG + QSOL/Ubldg⁠ Inda:

ma'auni shine ma'aunin ma'aikatar iska ta waje, wanda aka bayar a cikin ° C (° F).
tThermostat shine tsarin zafin jiki na ginin, wanda aka bayar a cikin ° C (° F).
Q_IHG shine yawan samar da zafi na ciki a kowane yanki na bene saboda zama, hasken lantarki da kayan aikin inji, wanda aka bayar a cikin W / m² (Btu / s / ft²). Wannan ƙarni na zafi na ciki ba koyaushe ba ne saboda bambancin zama, hasken wuta, da jadawalin aiki na kayan aiki amma galibi ana ɗaukarsa koyaushe ga kusanci na farko.
Q_SOL shine samun zafi a kowane yanki na bene saboda radiation na rana, wanda aka bayar a cikin W / m² (Btu / s / ft²). Wannan karuwar zafi ba ta da daidaituwa saboda canjin hasken rana tare da lokacin rana da shekara amma galibi ana ɗaukarsa daidaituwa ga kusanci na farko. A cikin hunturu, yana da ma'ana a ɗauka Q_SOL=0..
U_bldg shine yawan canja wurin zafi a fadin ginin envelope ta digiri bambancin zafin jiki tsakanin zafin jiki na waje da na cikin gida da kuma kowane yanki na bene, wanda aka bayar a W / K / m² (Btu / s / ° F / ft2). Wannan canja wurin zafi na iya bambanta saboda bambancin iska mai iska amma galibi ana ɗaukarsa koyaushe ga kusanci na farko.

Wannan daidaitattun an sauƙaƙe shi ta hanyar ɗauka canjin zafi tsakanin ginin da muhalli kuma kawai yana ba da kimanin ma'aunin ma'auni na ginin. Littafin ASHRAE na 2013 - Tushen, Babi na F18 yana ba da hanyoyin da suka fi dacewa don lissafin nauyin dumama a cikin gine-ginen da ba na zama ba. Hanyar ma'aunin zafi ta ASHRAE, alal misali, tana tsara canjin zafi ta hanyar iyakokin ciki da na waje na bangon gini ta hanyar haɗa radiative (misali rana, saman cikin gida), convective (misali iska ta cikin gida da waje), da kuma mai gudanarwa (misali ciki zuwa iyakar waje) hanyoyin canja wurin zafi.^[2]

Hanyoyin Tabbatar

Fayil:Energy signature method to determine balance point temperature.png

Misali na ƙayyade ma'aunin ma'auni na ginin ta amfani da hanyar sa hannu ta makamashi.

A cikin yanayin duniya na ainihi, ana iya ƙayyade ma'auni ta ɗaya daga cikin hanyoyi biyu. A cikin hanyar sa hannu na makamashi, an ƙirƙiri wani mãkirci don amfani da makamashi akan matsakaicin zafin jiki na waje. Ma'anar a kan ginshiƙi wanda ke da ikon cin gashin kansa da kuma yanayin da ke da ikon lantarki ko gas ya haɗu da yanayin zafin jiki. Wannan hanyar tana aiki ne kawai idan akwai bayanai masu yawa game da amfani da makamashi na gini, wanda ya fi dacewa a kan ƙuduri na yau da kullun.^[3]

a cikin Ha la aiki an halicci makamashi da yawa na amfani da makamashi game da kwanakin digiri na dumama (HDD) da kwanakin digiri mai sanyaya (CDD), ta amfani da kewayon yanayin daidaitawa don lissafin kwanakin digiri. Polynomials na biyu mafi kyau na nau'in y = ax2 + bx + c ana amfani da su ga mãkirci, wanda ke nuna matakai daban-daban na karkata a fadin kewayon bayanai dangane da daidaito na ma'aunin ma'auni. A cikin makircin da ke da yanayin zafi mai yawa mai canzawa yana da kyau, wanda ke haifar da karkata zuwa sama, yayin da makircin tare da yanayin zafi na ma'auni ya sauka zuwa ƙasa saboda mummunan canji. Makircin da a ya fi kusa da sifili yana wakiltar daidaitattun ma'aunin ma'auni. Ana iya amfani da wannan hanyar ga gine-gine inda wadatar bayanan amfani da makamashi ba ta da yawa, watakila ana samun su ne kawai a kowane mako ko kowane wata.^[4]

Manazarta

↑ Utzinger, Michael; Wasley, James. "Vital Signs Curriculum Materials Project" (PDF). UC Berkeley. College of Environmental Design. Archived from the original (PDF) on 12 June 2012. Retrieved 25 November 2014.
↑ Utzinger, Michael; Wasley, James. "Vital Signs Curriculum Materials Project" (PDF). UC Berkeley. College of Environmental Design. Archived from the original (PDF) on 12 June 2012. Retrieved 25 November 2014.
↑ Lee, Kyoungmi; Baek, Hee-Jeong; Cho, ChunHo (2014). "The Estimation of Base Temperature for Heating and Cooling Degree-Days for South Korea". Journal of Applied Meteorology and Climatology. 53 (2): 300–309. Bibcode:2014JApMC..53..300L. doi:10.1175/jamc-d-13-0220.1.
↑ Day, A. R.; Knight, I.; Dunn, G.; Gaddas, R. (2003). "Improved methods for evaluating base temperature for use in building energy performance lines". Building Services Engineering Research and Technology. 24 (4): 221–228. doi:10.1191/0143624403bt073oa. S2CID 111019051.

[Utzinger-1] Utzinger, Michael; Wasley, James. "Vital Signs Curriculum Materials Project" (PDF). UC Berkeley. College of Environmental Design. Archived from the original (PDF) on 12 June 2012. Retrieved 25 November 2014.

[Utzinger2-2] Utzinger, Michael; Wasley, James. "Vital Signs Curriculum Materials Project" (PDF). UC Berkeley. College of Environmental Design. Archived from the original (PDF) on 12 June 2012. Retrieved 25 November 2014.

[Lee2-3] Lee, Kyoungmi; Baek, Hee-Jeong; Cho, ChunHo (2014). "The Estimation of Base Temperature for Heating and Cooling Degree-Days for South Korea". Journal of Applied Meteorology and Climatology. 53 (2): 300–309. Bibcode:2014JApMC..53..300L. doi:10.1175/jamc-d-13-0220.1.

[Day2-4] Day, A. R.; Knight, I.; Dunn, G.; Gaddas, R. (2003). "Improved methods for evaluating base temperature for use in building energy performance lines". Building Services Engineering Research and Technology. 24 (4): 221–228. doi:10.1191/0143624403bt073oa. S2CID 111019051.

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