Ngarep > Kabar > Warta Industri

Prinsip insulasi termal flask vakum

2023-09-11

Ana telung cara transfer panas: radiasi termal, konveksi termal, lan konduksi termal.

Nalika wong kena sinar srengenge, dheweke bakal krasa panas ing awak. Iki amarga panas srengenge tekan awak kita. Iki diarani radiasi termal.

Cara paling apik kanggo nyegah radiasi panas yaiku kanggo mblokir maneh. Bahan sing paling apik kanggo nggambarake panas yaiku pangilon.

Tuangake segelas banyu sing nggodhok lan lebokake ing meja. Amarga mili banyu ing cangkir lan hawa ing sakubenge, suhu banyu kanthi bertahap dadi padha karo suhu lingkungan sekitar. Iki minangka konveksi panas.

Yen sampeyan nambah tutup kanggo tuwung, iku bakal mblokir dalan konveksi. Nanging segelas banyu isih bakal adhem, nanging bakal luwih suwe. Iki amarga cangkir nduweni sifat nganakake panas, sing diarani konduksi panas.

The thermos bottle is made of double-layer glass, and both layers of glass are coated with silver. Like a mirror, it can reflect heat rays back, thus cutting off the path of heat radiation. Evacuating a vacuum between the two layers of glass in a thermos bottle destroys the conditions for convection and conduction. The hot water bottle cap is made of cork, which is not easy to conduct heat, and blocks the path of convection heat transfer. By perfectly blocking all three paths of heat transfer, heat can be retained for a long time. However, the heat insulation of the thermos bottle is not that ideal, and some heat can still escape. Therefore, the heat preservation time of the labu vakumnduweni watesan tartamtu.

Fungsi termos yaiku kanggo njaga suhu banyu panas ing jero botol lan ngilangi ijol-ijolan panas ing njero lan njaba botol, supaya "panas" ing jero botol ora bisa metu lan "kadhemen" ing njaba. botol ora bisa mlebu Yen sijine popsicles inglabu vakum, "panas" saka njaba ora bakal gampang lolos menyang botol, lan popsicles ora gampang leleh. Mulane, ilmiah diarani termos minangka termos, amarga bisa tetep "panas" lan "kadhemen". Botol termos sing digunakake ing omah bisa njaga suhu banyu panas kanthi apik. Apa prinsipe? Pendinginan banyu panas disebabake konveksi panas, konduksi panas lan radiasi panas. Kandung kemih botol termos digawe kanggo ngrampungake telung masalah ing ndhuwur. Gabus digunakake ing cangkeme botol kanggo nyegah konveksi hawa panas lan adhem; longkangan antarane kandung kemih botol pindho lapisan wis dievakuasi kanggo ngatasi masalah konduksi panas; lapisan lancip saka salaka wis Applied kanggo nguyuh botol kanggo nggawe iku nggambarake cahya lan bayangan. Pangilon panas nggunakake lapisan perak kanggo ngalangi radiasi panas. Kanthi cara iki, panas ora bakal ilang lan bakal tumindak minangka alabu vakum.

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