Several solar collectors are used to obtain energy from the sun to heat ethylene glycol. The...
Several solar collectors are used to obtain energy from the sun to heat ethylene glycol. The ethylene glycol flows at 0.006 m3/s from the collectors to a plate and frame heat exchanger. The ethylene glycol enters the heat exchanger at 24°C, where it transfers heat to fresh water. The water enters the exchanger at 0.005 m3/s, with a temperature of 10°C. The plate height is 1.5 m, and a plate spacing of 4.3 mm. There are 15 plates made of 304SS (stainless steel) that are 0.8 mm thick x 0.5 m wide. Determine the outlet temperature of both fluids.
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Several solar collectors are used to obtain energy from the sun
to heat ethylene glycol. The...
4 Several solar collectors are used to obtain energy from the sun to heat ethylene lycol. The eth...
4 Several solar collectors are used to obtain energy from the sun to heat ethylene lycol. The ethylene glycol flows at 0.006 m3/s from the collectors to a plate and frame heat exchanger. The ethylene glycol enters the heat exchanger at 24°C where it transfers heat to fresh water. The water enters the exchanger at 0.005 m3/s, with a temperature of 1 4.3 mm. There are 15 plates made of 304SS (stainless steel) that are 0.8 mm thick x 0....
A plate and frame HX has19 stainless steel (316SS) plates.9 m tall, 2 mm thick and...
A plate and frame HX has19 stainless steel (316SS) plates.9 m tall, 2 mm thick and .7 m wide which are spaced 5 mm apart. It is used to cool water at .012 m3/s,and inlet temperature of 35 C. The cooling medium s cold water which enters the HX at 7 C with the volumetric flow rate of 0.02 m3/s. What outlet temperature can be expected when the exchanger is new?
Q2. Shell-and-tube heat exchangers with hundreds of tubes housed in a shell are commonly used in...
Q2. Shell-and-tube heat exchangers with hundreds of tubes housed in a shell are commonly used in practice for heat transfer between two fluids (shown in Figure 1). Such a heat exchanger used in an active solar hot-water system transfers heat from a water-antifreeze solution flowing through the shell and the solar collector to fresh water flowing through the tubes at an average temperature of 60°C at a rate of 15 L/S. The heat exchanger contains 80 brass tubes 1 cm...
Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the...
Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the figure below is used to cool propane fuel W 50 mm H 25 mm Saturated Vapor propane Thickness t =5 mm H 25 mm Cooling water Length L The flow rate of the cooling water is 0.2 kg/s, while the flow of the propane is 0.1 kg/s. The water enters the heat exchanger at a temperature of 20°C while the propane enters at its...
In a solar water heater, energy from the Sun is gathered by water that circulates through...
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that the efficiency of the overall system is 29.0% (that is, 71% of the incident solar energy is lost from the system). What collector area is necessary to raise the temperature of 430...
In a solar water heater, energy from the Sun is gathered by water that circulates through...
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that the efficiency of the overall system is 28.0% (that is, 72% of the incident solar energy is lost from the system). What collector area is necessary to raise the temperature of 240...
In a solar water heater, energy from the Sun is gathered by water that circulates through...
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that the efficiency of the overall system is 29.0% (that is, 71% of the incident solar energy is lost from the system). What collector area is necessary to raise the temperature of 350...
Chapter 18, Problem 029 In a solar water heater, energy from the Sun is gathered by...
Chapter 18, Problem 029 In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that the efficiency of the overall system is 14.0% (that is, 86% of the incident solar energy is lost from the system). What collector area is necessary to raise...
Q1: Heated air at 1 atm, 100F, and 23% relative humidity is to be transported in...
Q1: Heated air at 1 atm, 100F, and 23% relative humidity is to be transported in a 490 ft long circular plastic duct at a rate of 740 cfm (ft 3 /min). If the head loss in the duct is not to MEC_AMO_TEM_034_01 Page 1 of 8 Design of Thermal System (MECH 0009) - Spring-2020 -Assignment 2- A&B - QP exceed 790 in. of air, determine the minimum diameter of the duct. (Hint: initial guess value for the diameter is...
Homework 7 heat transfer 2018-20 1) A horizontal tube of 12.5-mm dimeter with an outer srface temperature of 240°C is placed in a room with an air temperature of 20°C. Estimate the heat transfer rate...
Homework 7 heat transfer 2018-20 1) A horizontal tube of 12.5-mm dimeter with an outer srface temperature of 240°C is placed in a room with an air temperature of 20°C. Estimate the heat transfer rate per unit length of the tube due to free convection. 2) Air at -10°C flows at 10 m/s over the roof plate of two 5m length rooms whose air is at Too-200C. The roof plate is 0.20-m thick concrete (k = 0.6 w/ m. K)....
4 Several solar collectors are used to obtain energy from the sun to heat ethylene lycol. The ethylene glycol flows at 0.006 m3/s from the collectors to a plate and frame heat exchanger. The ethylene glycol enters the heat exchanger at 24°C where it transfers heat to fresh water. The water enters the exchanger at 0.005 m3/s, with a temperature of 1 4.3 mm. There are 15 plates made of 304SS (stainless steel) that are 0.8 mm thick x 0....
Q2. Shell-and-tube heat exchangers with hundreds of tubes housed in a shell are commonly used in practice for heat transfer between two fluids (shown in Figure 1). Such a heat exchanger used in an active solar hot-water system transfers heat from a water-antifreeze solution flowing through the shell and the solar collector to fresh water flowing through the tubes at an average temperature of 60°C at a rate of 15 L/S. The heat exchanger contains 80 brass tubes 1 cm...
Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the figure below is used to cool propane fuel W 50 mm H 25 mm Saturated Vapor propane Thickness t =5 mm H 25 mm Cooling water Length L The flow rate of the cooling water is 0.2 kg/s, while the flow of the propane is 0.1 kg/s. The water enters the heat exchanger at a temperature of 20°C while the propane enters at its...
Chapter 18, Problem 029 In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. Assume that the efficiency of the overall system is 14.0% (that is, 86% of the incident solar energy is lost from the system). What collector area is necessary to raise...
Q1: Heated air at 1 atm, 100F, and 23% relative humidity is to be transported in a 490 ft long circular plastic duct at a rate of 740 cfm (ft 3 /min). If the head loss in the duct is not to MEC_AMO_TEM_034_01 Page 1 of 8 Design of Thermal System (MECH 0009) - Spring-2020 -Assignment 2- A&B - QP exceed 790 in. of air, determine the minimum diameter of the duct. (Hint: initial guess value for the diameter is...
Homework 7 heat transfer 2018-20 1) A horizontal tube of 12.5-mm dimeter with an outer srface temperature of 240°C is placed in a room with an air temperature of 20°C. Estimate the heat transfer rate per unit length of the tube due to free convection. 2) Air at -10°C flows at 10 m/s over the roof plate of two 5m length rooms whose air is at Too-200C. The roof plate is 0.20-m thick concrete (k = 0.6 w/ m. K)....
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