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O Solar panels mounted with an inclination of 20°fr O Free convection only O Free convection and wind with a speed of 5 m/s u O Vertical tubes, with free convection only O Horizontal tubes with free convection only O Forced convection inside the tubes heat exchanger that transfers the heat captured by the plate ensioned. Using the convection coefficient, determine the mi

O Solar panels mounted with an inclination of 20°fr O Free convection only O Free convection and wind with a speed of 5 m/s u O Vertical tubes, with free convection only O Horizontal tubes with free convection only O Forced convection inside the tubes heat exchanger that transfers the heat captured by the plate ensioned. Using the convection coefficient, determine the mi

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Must be delivered: Calculation memo specifying all necessary steps Check the convection coefficients used in the AB1 project under the following conditions: O Solar panels mounted with an inclination of 20° from the horizontal O Free convection only O Free convection and wind with a speed of 5 m/s up the plates O Vertical tubes, with free convection only O Horizontal tubes with free convection only O Forced convection inside the tubes The heat exchanger that transfers the heat captured by the plates to the boiler needs to be dimensioned. Using the convection coefficient, determine the minimum area of the heat exchanger for the following cases: O Parallel flow exchanger O Counter flow exchanger O Boiler exchanger, with free convection in the boiler, horizontal tube, temperature constant inside the boiler Unspecified values must be determined and the choice must be explained (source, basis of estimate with calculation)
Transcribed Image Text:Must be delivered: Calculation memo specifying all necessary steps Check the convection coefficients used in the AB1 project under the following conditions: O Solar panels mounted with an inclination of 20° from the horizontal O Free convection only O Free convection and wind with a speed of 5 m/s up the plates O Vertical tubes, with free convection only O Horizontal tubes with free convection only O Forced convection inside the tubes The heat exchanger that transfers the heat captured by the plates to the boiler needs to be dimensioned. Using the convection coefficient, determine the minimum area of the heat exchanger for the following cases: O Parallel flow exchanger O Counter flow exchanger O Boiler exchanger, with free convection in the boiler, horizontal tube, temperature constant inside the boiler Unspecified values must be determined and the choice must be explained (source, basis of estimate with calculation)
To save energy, the installation of solar heating in a two-story house was planned. The system consists of two solar panels installed on the roof, a boiler on the ground floor, a circulation pump and a heat exchanger inside the boiler. The heat exchanger is used to prevent drinking water from passing through the plates. Determine the heat losses of the solar heating system with the following environmental conditions: Cold water temperature 25°C Hot water temperature 80°C Surface temperature of solar panels 85°C Emissivity of plates = 0.9 Area of solar panels: 7.34 m? (3.67 m² each plate) Sky temperature (radiation loss -10°C) Diameter (outer) of tubes 22 mm Tube wall thickness 3 mm Tube insulation: 5 cm layer of Styrofoam Convection coefficient on top of the solar plates a=10 W/(m²K) Convection coefficient for tubes (outside) = 3 W/(m²K) Convection coefficient for tubes (inside) = 50 W/(m?K) Copper tube material Heat loss on solar plates only by convection and radiation Ambient air temperature 30°c Fluid used: water
Transcribed Image Text:To save energy, the installation of solar heating in a two-story house was planned. The system consists of two solar panels installed on the roof, a boiler on the ground floor, a circulation pump and a heat exchanger inside the boiler. The heat exchanger is used to prevent drinking water from passing through the plates. Determine the heat losses of the solar heating system with the following environmental conditions: Cold water temperature 25°C Hot water temperature 80°C Surface temperature of solar panels 85°C Emissivity of plates = 0.9 Area of solar panels: 7.34 m? (3.67 m² each plate) Sky temperature (radiation loss -10°C) Diameter (outer) of tubes 22 mm Tube wall thickness 3 mm Tube insulation: 5 cm layer of Styrofoam Convection coefficient on top of the solar plates a=10 W/(m²K) Convection coefficient for tubes (outside) = 3 W/(m²K) Convection coefficient for tubes (inside) = 50 W/(m?K) Copper tube material Heat loss on solar plates only by convection and radiation Ambient air temperature 30°c Fluid used: water
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