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HVAC
3. Ambient temperature is 75 F and a warm ceiling causes the mean radiant temperature...
CTIVITY 11-4-Heat Problems the Ambient Temperature Correction Chart, calculate the horsepower rat...
CTIVITY 11-4-Heat Problems the Ambient Temperature Correction Chart, calculate the horsepower rating. Using 1. The motor rating adjusted for ambient temperature is HP 1.45 1.40 135 PHASE1 CYCLE 60 AMPS 40 1.30 1.25 1.20 LL 1.15 1.10 105 TYPE IAC HP 50 1L1111 VOLTS[115] "С AMPS [401 RPM 1725 TEMP RISE 40° C SF 1.0 TIME RATE CONT 90 85 80 .75 CODE D 40°C -20°C 0C 20°C 40°C 60°C 40°F 4F 32°F 68°F 104°F 140°F AMBIENT TEMPERATURE AMBIENT TEMPERATURE...
HVAC 3. A conditioned space is to be maintained at 75 F and 50% relative humidity....
HVAC
3. A conditioned space is to be maintained at 75 F and 50% relative humidity. Mark this state on the chart as ". @P6 RA". The load on this space is known to have an enthalpy to humidity ratio or psychrometric slope of 4000 BTU/Ibm. The supply air is provided at 55 F. Mark the SA state as OP6 SA What is the enthalpy for the SA found by using the chart? What is the humidity ratio for the...
3.- At the ambient temperature of 20 ° C, there is a 1.5 mm gap between...
3.- At the ambient temperature of 20 ° C, there is a 1.5 mm gap
between the ends of the rods shown below when the temperature
reaches 140 ° C. Find:
a) the normal stress on the aluminum rod,
b) changing length of aluminum rod.
Make the free body diagram and explain step by step
1.5 mm 325 mm 225 mm A B Aluminum A = 2000 mm E = 75 CPA a = 23 x 10-6/C Stainless steel Acero...
Question 4: In an experiment to determine the effect of ambient air temperature on the emissions...
Question 4: In an experiment to determine the effect of ambient air temperature on the emissions of oxides of nitrogen (NOx) of diesel trucks, 10 trucks were run at temperatures of 40°F and 80°F. The order of the testing for a particular truck was randomized by the flip of a coin. The emissions in ppm (and some summary statistics) are presented in the table below. The qqplot for the paired difference is shown in the figure below. Truck 40F 80F...
You are building a new house, you can buy cheap ceiling insulation (R =11 ft2-°F-hr/Btu) or...
You are building a new house, you can buy cheap ceiling insulation (R =11 ft2-°F-hr/Btu) or more expensive insulation (R=25 ft2-°F-hr/Btu). If the winter outside average temperature is 45°F for 4 months in HSV, and 3 months of summer (85°F). Assume that you keep the house at 70°F. • What is difference in electricity costs if electricity cost are 8 cents/kW hr? (Ahouse = 40 x30 ft) • If the difference in cost is $1,200 at time of installation, what...
3. (4 points) The scores on a test are normally distributed with a mean of 75...
3. (4 points) The scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. a) Find the proportion of students having scores greater than 85. b) If the bottom 3% of students will fail the course, what is the lowest score that a student can have and still be awarded a passing grade? Please round up to the nearest integer.
It has long been stated that the mean temperature of humans is 98.6°F
It has long been stated that the mean temperature of humans is 98.6°F. However, two researchers currently involved in the subject thought that the mean temperature of humans is less than 98.6°F. They measured the temperatures of 56 healthy adults 1 to 4 times daily for 3 days, obtaining 250 measurements. The sample data resulted in a sample mean of 98.3°F and a sample standard deviation of 1°F. Use the P-value approach to conduct a hypothesis test to judge whether...
3. (25 points) A room is 75 ft (side to side) x 80 ft (front to back) x 30 ft (floor to ceiling). The front wall is...
3. (25 points) A room is 75 ft (side to side) x 80 ft (front to back) x 30 ft (floor to ceiling). The front wall is made out of glass, the back wall is covered with curtains, both sidewalls are made of plasterboard, the ceiling is covered with acoustical board, and the floor is concrete. Table 8-3 Average Absorption Coefficients for Several Types of Building Materials at Octave Frequency Intervals Frequency (Hz) 4000 Material 2000 125 250 500 1000...
It has long been stated that the mean temperature of humans is 98.6°F
It has long been stated that the mean temperature of humans is 98.6°F. However, two researchers currently involved in the subject thought that the mean temperature of humans is less than 98.6°F. They measured the temperatures of 67 healthy adults 1 to 4 times daily for 3 days. obtaining 300 measurements. The sample data resulted in a sample mean of 98.3°F and a sample standard deviation of 1.1°F. Use the P-value approach to conduct a hypothesis test to do whether...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with a flow rate of 1000 # 3/min enters a warm-air furnace and humidifier unit. The air leaves the unit at a temperature of 120 F and a relative humidity of 12%. If the air flows through the unit at a pressure of 14.5 psia and if the water is supplied to the humidifier at 65 F, using the appropriate equations, determine: a) the mass...
CTIVITY 11-4-Heat Problems the Ambient Temperature Correction Chart, calculate the horsepower rating. Using 1. The motor rating adjusted for ambient temperature is HP 1.45 1.40 135 PHASE1 CYCLE 60 AMPS 40 1.30 1.25 1.20 LL 1.15 1.10 105 TYPE IAC HP 50 1L1111 VOLTS[115] "С AMPS [401 RPM 1725 TEMP RISE 40° C SF 1.0 TIME RATE CONT 90 85 80 .75 CODE D 40°C -20°C 0C 20°C 40°C 60°C 40°F 4F 32°F 68°F 104°F 140°F AMBIENT TEMPERATURE AMBIENT TEMPERATURE...
HVAC
3. A conditioned space is to be maintained at 75 F and 50% relative humidity. Mark this state on the chart as ". @P6 RA". The load on this space is known to have an enthalpy to humidity ratio or psychrometric slope of 4000 BTU/Ibm. The supply air is provided at 55 F. Mark the SA state as OP6 SA What is the enthalpy for the SA found by using the chart? What is the humidity ratio for the...
3.- At the ambient temperature of 20 ° C, there is a 1.5 mm gap
between the ends of the rods shown below when the temperature
reaches 140 ° C. Find:
a) the normal stress on the aluminum rod,
b) changing length of aluminum rod.
Make the free body diagram and explain step by step
1.5 mm 325 mm 225 mm A B Aluminum A = 2000 mm E = 75 CPA a = 23 x 10-6/C Stainless steel Acero...
Question 4: In an experiment to determine the effect of ambient air temperature on the emissions of oxides of nitrogen (NOx) of diesel trucks, 10 trucks were run at temperatures of 40°F and 80°F. The order of the testing for a particular truck was randomized by the flip of a coin. The emissions in ppm (and some summary statistics) are presented in the table below. The qqplot for the paired difference is shown in the figure below. Truck 40F 80F...
You are building a new house, you can buy cheap ceiling insulation (R =11 ft2-°F-hr/Btu) or more expensive insulation (R=25 ft2-°F-hr/Btu). If the winter outside average temperature is 45°F for 4 months in HSV, and 3 months of summer (85°F). Assume that you keep the house at 70°F. • What is difference in electricity costs if electricity cost are 8 cents/kW hr? (Ahouse = 40 x30 ft) • If the difference in cost is $1,200 at time of installation, what...
3. (4 points) The scores on a test are normally distributed with a mean of 75 and a standard deviation of 8. a) Find the proportion of students having scores greater than 85. b) If the bottom 3% of students will fail the course, what is the lowest score that a student can have and still be awarded a passing grade? Please round up to the nearest integer.
3. (25 points) A room is 75 ft (side to side) x 80 ft (front to back) x 30 ft (floor to ceiling). The front wall is made out of glass, the back wall is covered with curtains, both sidewalls are made of plasterboard, the ceiling is covered with acoustical board, and the floor is concrete. Table 8-3 Average Absorption Coefficients for Several Types of Building Materials at Octave Frequency Intervals Frequency (Hz) 4000 Material 2000 125 250 500 1000...
PH) 3) Air at a temperature of 60 F and a relative humidity of 60% with a flow rate of 1000 # 3/min enters a warm-air furnace and humidifier unit. The air leaves the unit at a temperature of 120 F and a relative humidity of 12%. If the air flows through the unit at a pressure of 14.5 psia and if the water is supplied to the humidifier at 65 F, using the appropriate equations, determine: a) the mass...
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