CoCalc -- 437.ipynb

Jupyter notebook Homework 2/437.ipynb

Project: Ben Thornton - ENSP 437 SP2016

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Kernel: Python 2 (SageMath)

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from pint import UnitRegistry
u = UnitRegistry()

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R_card = (.75 * u.feet**2 * u.hour * u.delta_degF / u.btu)

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Total_R_card = (R_card + airfilm_window) * 6

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Total_R_card

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Total_R_card

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area_card = 7.3 * u.feet**2

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U_card = 1 / Total_R_card

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U_card

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UA_card = U_card * area_card

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UA_card

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R_foam = (2 * u.feet**2 * u.hour * u.delta_degF / u.btu)

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Total_R_foam = R_foam * 4

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Total_R_foam

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area_foam = 4.6 * u.feet**2

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U_foam = 1 / Total_R_foam

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U_foam

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UA_foam = U_foam * area_foam

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UA_foam

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area_window = .22 * u.feet**2

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airfilm_window = (1.5 * u.feet**2 * u.hour * u.delta_degF / u.btu)

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airfilm_window

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U_window = 1 / airfilm_window

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UA_window = U_window * area_window

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UA_window

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UA_total = 1.3 * u.btu / (u.delta_degF * u.hour)

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UA_total

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water = 4 * u.pound

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water_heat_capacity = (4.186 * u.joules / u.gram / u.kelvin)

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mass_box = 35 * u.pound

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Total_R_value = Total_R_foam + Total_R_card + airfilm_window

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Total_R_value

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Total_U_value = 1 / Total_R_value

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Total_U_value

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