Balances De Energia.docx
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Intercambiadores de calor: 20000 lt/h de leche para fabricación de queso (V1) se ha de calentar desde 4ºC hasta 34ºC por medio de 3000 lt/h de agua caliente (V2) a 50ºC. la densidad (ρ) y el Cp de la leche será de 1020 kg/m3 y 3.95 KJ/kg.K y para el agua 990 kg/m3 (a 50ºC) y 4.18 KJ/kg.K. El cambio de Tº para el agua caliente se calculará con:
𝑽𝟏 ∗ 𝝆𝟏 ∗ 𝑪𝒑𝟏 ∗ ∆𝑻𝟏 = 𝑽𝟐 ∗ 𝝆𝟐 ∗ 𝑪𝒑𝟐 ∗ ∆𝑻𝟐 (2000)(1020)(3.95)(34 − 4) = (30000)(990)(4.18)(∆T2 ) (∆𝐓𝟐 ) = 19.5°C. La temperatura del agua caliente caerá 19.5°C, de 50 hasta 30.5°C
𝑽𝟏 ∗ 𝝆𝟏 ∗ 𝑪𝒑𝟏 ∗ ∆𝑻𝟏 = 𝑽𝟐 ∗ 𝝆𝟐 ∗ 𝑪𝒑𝟐 ∗ ∆𝑻𝟐 (2000)(1020)(3.95)(34 − 4) = (30000)(990)(4.18)(∆T2 ) (∆𝐓𝟐 ) = 19.5°C. La temperatura del agua caliente caerá 19.5°C, de 50 hasta 30.5°C
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