General mamiriro ekuvandudzwa kwekusimuka kwemhepo

Mumakore achangopfuura, nzira nyowani yekufefetera, yekutamisa mhepo, yakawedzera kukwezva kutarisa kwevagadziri uye varidzi munyika yangu. Kana ichienzaniswa neyechinyakare yakasanganiswa nzira yekufemesa, iyi nzira yekupa mhepo inoita kuti nzvimbo yebasa remukati iwane mhando yepamusoro yemhepo, kunyaradza kwepamusoro uye kufefetera kwepamusoro. Muna 1978, imwe nzvimbo muBerlin, Germany yakatora nzira yekufemesa mweya kekutanga. Kubva ipapo, iyo displacement ventilation system yave kushandiswa zvakanyanya muzvivakwa zveindasitiri, zvivakwa zvevagari uye zvivakwa zveveruzhinji. Kunyanya munyika dzeNordic, inenge 60% yemaindasitiri ekufambisa mhepo ikozvino inoshandisa displacement ventilation systems; inenge 25% yemahofisi ekufambisa mhepo anoshandisa displacement ventilation systems.

Nhanganyaya kune musimboti wekubvisa mhepo

Displacement ventilation inotungamira mweya mutsva munzvimbo yebasa uye inogadzira dziva rakatetepa remhepo pasi. Madziva emhepo anoumbwa nekuparadzirwa kwemhepo inotonhorera inotonhorera. Zvitubu zvekupisa (vanhu nemidziyo) mukamuri zvinoburitsa kumusoro convective kuyerera kwemhepo. Nekuda kwebuoyancy yenzvimbo yekupisa, mweya mutsva unoyerera uchienda kumusoro kwekamuri uye unotungamira kune inotungamira mhepo yekufamba kwemukati memhepo. Exhaust vents anoiswa pamusoro pekamuri uye anopedza mweya wakasviba. Kupisa kwemhepo yakachena inodyiswa mukamuri nemagetsi ekupa inowanzodzika kudarika kupisa kwenzvimbo yebasa remukati. Inonyura pamusoro nekuda kwehuwandu hwemhepo inotonhorera. Kumhanya kwemhepo yekufambisa kwemhepo kunosvika 0.25m/s. Iko kukurumidza kwemhepo yekugovera yakaderera zvekuti haina chero chinhu chinoshanda pamhepo iripo yekuyerera mukamuri. Mhepo inotonhorera inotonhorera inopararira pamusoro pepasi rese remukati senge yekudira mvura uye inotungamira kudhamu remhepo. Iyo thermal convection airflow inokonzerwa nekupisa sosi inogadzira yakatwasuka tembiricha gradient mukamuri. Muchiitiko ichi, kutonhora kwemhepo yemhepo inopera yakakwirira kudarika kupisa kwekushanda kwemukati. Zvinogona kuoneka kuti iyo inotungamira kuyerera kwemhepo yekufambisa kwemhepo inodzorwa neiyo indoor kupisa sosi. Naizvozvo, rudzi urwu rwekufefetedza rwunodaidzwawo kuti heat displacement ventilation.