Ihe nkiri mkpuchi ụlọ

akpụkpọ anụ ụlọ

A na-anwale ike ikuku nke mkpuchi ụlọ site na ụzọ dị iche iche n'okpuru ụfọdụ ọnọdụ ụlọ nyocha dị ka okpomọkụ, nrụgide na iru mmiri. O siri ike ịnweta ọnọdụ ndị yiri ya na ọmụmụ ihe ndị dị otú ahụ, ya mere ụkpụrụ ndị e nyere n'ụzọ dị otú a abụghị ihe a pụrụ ịdabere na ya kpamkpam. A na-enyekarị ike ikuku vapo na nkeji g/m2 / ụbọchị, nke pụtara ọnụọgụ mmiri dị na gram nke ga-agafe otu square mita nke foil kwa ụbọchị. Ihe na-egosi nke ọma karị nke vapor permeability nke foil bụ mgbasa ozi na-eguzogide ọnụọgụ Sd, nke egosipụtara na mita (ọ na-anọchite anya ọkpụrụkpụ ya na mgbasa nke oghere ikuku). Ọ bụrụ na Sd = 0,02 m, nke a pụtara na ihe ahụ na-emepụta ihe na-eguzogide ikuku mmiri nke ikuku 2 cm na-emepụta. Uzuoku permeability? nke a bụ ọnụọgụ mmiri nke ihe nkiri mkpuchi ụlọ (ajị anụ, akpụkpọ anụ) nwere ike ịgafe n'okpuru ọnọdụ ụfọdụ. Uzuoku mmiri a ọ na-ebu ikike dị elu n'otu ụzọ (nke a na-eleghara anya nke ọzọ)? ya mere ọ dị ezigbo mkpa ịtọba foil n'elu ụlọ na akụkụ aka nri, na-ejikarị ihe odide ahụ eme ihe, ka ikuku mmiri wee banye n'ime ime n'èzí. A na-akpọkwa ihe nkiri mkpuchi ụlọ dị ka ihe nkiri dị n'okpuru ebe n'ihi na ọ nwere ike dochie ihe mkpuchi tar akwụkwọ omenala. Emebere ha iji chebe ihe owuwu ụlọ na mkpuchi mkpuchi site na mmiri ozuzo na snow na-ada n'okpuru mkpuchi. A na-echekwa na okpomọkụ agaghị apụ na oyi akwa mkpuchi okpomọkụ, ya mere ọ ga-echebekwa site na ifufe. Ma n'ikpeazụ? bụ iji wepụ oke mmiri nke nwere ike ịbanye n'ígwé nke elu ụlọ site n'ime ụlọ (na nke a, ị ga-aga n'ihu mgbe niile n'echiche na ikuku mmiri ga-abanye n'ime akwa ndị a n'ihi nkwụsị dị iche iche). Ọrụ ikpeazụ nke foil? permeability ya? yiri ka ọ bụ ihe kachasị mkpa mgbe ị na-ahọrọ ụdị ihe nkiri mkpuchi ụlọ site na ọtụtụ ndị na-emepụta ihe. A na-ewere ihe nkiri a dị ka nnukwu uzuoku na Sd <0,04 m (dakọtara karịa 1000 g / m2 / 24h na 23 Celsius C na 85% iru mmiri). Ka ọnụọgụ Sd dị ntakịrị, ka ihe nkiri ahụ na-eme ka uzuoku dịkwuo ukwuu. Dị ka uzuoku permeability si kwuo, a na-ekewa otu fim ndị nwere obere, ọkara na elu vapo permeability. erughị 100 g/m2/24 h? obere uzuoku permeable, ruo 1000 g / m2 / 24h - ọkara vepo permeable; ọnụọgụ Sd bụ 2-4 m; mgbe ị na-eji ha, ọ dị mkpa idowe oghere ikuku nke 3-4 cm n'elu mkpuchi iji gbochie mmiri ịbanye. Enwere ike idobe ihe nkiri nwere oke ikuku vapor ozugbo na rafters wee bata na kọntaktị mkpuchi mkpuchi. Ibu na nguzogide nke mkpuchi mkpuchi ụlọ na radieshon ultraviolet na-emetụta ịdịte aka nke ihe ahụ. Ka foil na-eto eto, otú ahụ ka ọ na-esikwu ike na ọ ga-emebi n'ibu na mmetụta ọjọọ nke radieshon anyanwụ (gụnyere ultraviolet? UV). Ihe nkiri a na-ejikarị eme ihe bụ 100, 115 g/m2 n'ihi oke ịdị arọ nke ịdị arọ na ike igwe na ike ikuku. Ihe nkiri nke nwere oke uzuoku permeability na-eguzogide ụzarị UV maka ọnwa 3-5 (ya na obere vapor permeability 3-4 izu). A na-enweta nkwụsi ike dị otú ahụ n'ihi ihe ndị na-eme ka ọ dị elu - ihe mgbakwunye na ihe. A na-agbakwunye ha iji chebe ihe nkiri site na ụzarị na-abanye na oghere (ma ọ bụ oghere) na mkpuchi n'oge ọrụ. Ihe mgbakwunye na-ebelata mmetụta ndị na-emerụ ahụ nke radieshon anyanwụ kwesịrị inye ọtụtụ afọ nke ihe eji eme ihe, ma ghara ịmanye ndị ọrụ nkwekọrịta ka ha na-emeso ihe nkiri mkpuchi ụlọ dị ka mkpuchi mkpuchi nwa oge ruo ọtụtụ ọnwa. Ihe nrịbama nke mmiri na-eguzogide mmiri nke foil bụ nguzogide nke ihe na nrụgide nke kọlụm mmiri. Ọ ga-abụrịrị ma ọ dịkarịa ala 1500 mm H20 (dị ka ọkọlọtọ German DIN 20811; na Poland, a naghị anwale nkwụsị mmiri dịka ọkọlọtọ ọ bụla) na 4500 mm H20 (dị ka ihe a na-akpọ. usoro nke kinetic). Ejiri plastik mee transparencies tupu mkpuchi? mere nke polyethylene (ike na nro), polypropylene, polyester na polyurethane, n'ihi ya, ha siri ike ma na-eguzogide nrụrụ. A na-ejikarị ihe nkiri okpukpu atọ emeziwanye ike, nke nwere akwa mkpuchi nke ntupu nke polyethylene siri ike, polypropylene ma ọ bụ fiberglass n'etiti polyethylene. Ekele maka imewe a, ha adịghị edozi nrụrụ n'oge arụ ọrụ na n'ihi ịka nká nke ihe. Ihe nkiri nwere oyi akwa na-egbochi condensation nwere eriri viscose-cellulose n'etiti akwa polyethylene abụọ, nke na-amịkọrọ oke ikuku mmiri wee wepụta ya nke nta nke nta. Ihe nkiri nke ikpeazụ nwere ikike ikuku dị ala. Ihe mkpuchi mkpuchi ụlọ (ihe anaghị kpara akpa) nwekwara usoro dị larịị. Isi oyi akwa bụ polypropylene anaghị kpara akpa kpuchie ya na polyethylene ma ọ bụ akpụkpọ anụ polypropylene microporous, mgbe ụfọdụ a na-eji ntupu polyethylene na-ewusi ike.