Question

In: Mechanical Engineering

‏The ceiling of an ice skating rink should have a high reflectivity to avoid condensation on...



‏The ceiling of an ice skating rink should have a high reflectivity to avoid condensation on the ceiling . If condensation forms on the ceiling , water may drip ca ice . The rink has a diameter of 50m and a height of 12m . The temperature of the ice and walls are -5 ° C and 15 ° C respectively . The air in the rink is also at 15 ° C Neglect the convective losses to the outside air . If the ceiling is a diffese - gray surface and the ice and walls can be approximated as black bodies , perform an energy balance on the ceiling to calculate the ceiling temperature . If the relative humidity of the rink air is 70 % and the dew point is 9c , will condensation occur if a coating is added that provides an emissivity of 0.05 ?

Solutions

Expert Solution

samet mamat answered 6 months ago
Next > < Previous

Related Solutions

A small girl is skating around on an ice rink. Her mass is 30 kg, and...
A small girl is skating around on an ice rink. Her mass is 30 kg, and her speed is 4.0 m/s. She sees a 50 kg sled at rest on the rink that was left there by a careless worker, and she decides to jump onto the sled. Assume no friction between the sled and the ice. a. Find the child-sled system’s speed immediately after the child jumps onto the sled. b. Find the child-sled system’s kinetic energy immediately after...
Moe and Larry are ice skating at their neighborhood rink. Moe (100 kg) is heading north...
Moe and Larry are ice skating at their neighborhood rink. Moe (100 kg) is heading north at 3 mys when he collides with Larry (75 kg) who is heading east at 2 m/s. They fall in a heap on the ice and cling on to each other for dear life as they go skidding across the rinK. a lf momentum is conserved in this collision, write out the equation or equations for momentum conservation. Otherwise, indicate NOT CONSERVED. b if...
Evaluate a 4-year investment opportunity in a new ice-skating rink. The purchase price is $8.4M. Shipping...
Evaluate a 4-year investment opportunity in a new ice-skating rink. The purchase price is $8.4M. Shipping installation costs are $600K. The capitalized value of the asset (i.e., its beginning book value) will be depreciated down to an end-of-life book value of 0.5 M. The anticipated selling price of machine is 1M. The ice rink is expected to provide cash sales of $14.1M per year and will require cash expenditures of $9.3M each year. Also, at t=0, working capital will rise...
Two friends, Al and Jo, have a combined mass of 166 kg. At the ice skating...
Two friends, Al and Jo, have a combined mass of 166 kg. At the ice skating rink, they stand close together on skates, at rest and facing each other. Using their arms, they push on each other for 1 second and move off in opposite directions. Al moves off with a speed of 5.9 m/sec in one direction and Jo moves off with a speed of 9.7 m/sec in the other. You can assume friction is negligible. 1)What is Al's...
what foods should patients avoid on this diet?: Low sodium, low cholesterol, low carbs, high fiber,...
what foods should patients avoid on this diet?: Low sodium, low cholesterol, low carbs, high fiber, low fiber, high protein, low protein, high potassium, low potassium
Should A-REITs have high leverage, or low leverage? Describe the optimal capital structure for a generic...
Should A-REITs have high leverage, or low leverage? Describe the optimal capital structure for a generic Australian Real Estate Investment Trust (A-REIT). How does your answer change if the A-REIT is a stapled security? Please include discussion of target leverage, maturity, debt security and the influence of common debt covenants.
Problem 4. A high-voltage power supply should have a nominal output voltage of 350 V. A...
Problem 4. A high-voltage power supply should have a nominal output voltage of 350 V. A sample of four units is selected each day and tested for process-control purposes. The data (see sheet Problem4 in Homework 4.xlsx) give the difference between the observed reading on each unit and the nominal voltage times ten; that is, ?? = (observed voltage on unit ? - 350)*10 (a) Set up ?̅ and ? charts on this process. Is the process in statistical control?...
South Africa has a high unemployment rate, researchers have suggested that the SA government should adopt...
South Africa has a high unemployment rate, researchers have suggested that the SA government should adopt expert-led growth policies to address this problem given that increasing exports has the potential to increase productivity, should the South African government increase its economic openness without government regulation of any kind? 100 words
South Africa has a high unemployment rate, researchers have suggested that the SA government should adopt...
South Africa has a high unemployment rate, researchers have suggested that the SA government should adopt expert-led growth policies to address this problem given that increasing exports has the potential to increase productivity, should the South African government increase its economic openness without government regulation of any kind? 100 words please give additional insight thank you
Net Stats: Should They Expect to Fail? For years, broad surveys have reported surprisingly high rates...
Net Stats: Should They Expect to Fail? For years, broad surveys have reported surprisingly high rates of ERP project failures. In a survey exploring the nature of these failures, Panorama Consulting Solutions, an ERP systems integrator, found that in 2015, 57 percent of ERP projects experienced cost overruns and schedule overruns. Even worse, 46 percent of the survey respondents reported receiving less than half of the expected benefits from their ERP implementation; 10 percent did not realize any measurable benefits....
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT