Nkọwa zuru ezu nke ụkpụrụ arụ ọrụ nke ndị na-agbanwe ọkụ (jiri eserese)

Ụkpụrụ bụ isi nke ihe na-ekpo ọkụ bụ ịnyefe okpomọkụ site na elu{0}} mmiri ọkụ gaa na obere okpomọkụ - na-enweghị njikọ kpọmkwem n'etiti ha abụọ - site na iji njikwa okpomọkụ na convection.
 Mmiri dị elu- na-ewepụta okpomọkụ, nke a na-ebufe site na mgbidi mgbanwe okpomọkụ.
 A na-eduzi ọkụ site na mgbidi ígwè (ma ọ bụ ikpo ọkụ ọkụ).
 Mmiri dị ala- na-amịkọrọ okpomọkụ, na-ebute ịrị elu ma ọ bụ daa na okpomọkụ.
 Usoro dum na-agbaso iwu nke abụọ nke Thermodynamics, ebe okpomọkụ na-esi na okpomọkụ dị elu na-asọpụta na mberede.

Dabere na ntụzịaka nke mmiri na-asọpụta, e nwere usoro mgbaba atọ bụ isi maka ndị na-agbanwe ọkụ:
 Co- na-asọpụta ugbu a (mkpokọta ndakọrịta): Mmiri abụọ a na-aga n'otu akụkụ, na ọdịiche okpomọkụ na-eji nwayọọ nwayọọ na-ebelata.
 Counter-nke na-eru ugbu a (counter{1}}flow): Mmiri abụọ a na-aga n'akụkụ dị iche iche, na-enye arụmọrụ mbufe okpomọkụ kachasị elu.
 Ofe-: mmiri mmiri abụọ a na-erute n’otu n’otu; nhazi a bụ kọmpat na ọtụtụ ebe.
 N'ime ndị a, counter{0}} nhazi nke ugbu a ka a na-ejikarị eme ihe na ngwa nrụpụta ebe achọrọ oke arụmọrụ.

Enwere ike ịkọwa usoro mbufe ọkụ n'ozuzu site na iji nha nha nke mbufe okpomọkụ.

Ntọala mbufe okpomọkụ:
Q=U × A × ΔTlm

Ebe:

Ajụjụ: Ọnụego mbufe ọkụ (W)
U: Ọnụego mbufe okpomọkụ (W/m²·K)
A: Mpaghara mbufe ọkụ (m²)
ΔTlm: Logarithmic pụtara ọdịiche okpomọkụ
ndetu aha nhatanha:
Ịbawanye U ma ọ bụ A nwere ike ịkwalite ikike mbufe okpomọkụ.
Ọdịiche okpomọkụ ka ukwuu na-ebute ike ịnya ụgbọ ala siri ike maka ịnyefe okpomọkụ.