I would like to have a set of ideas for improving ventilation inside gyms or improving sound reverberation when using speakers in Enhancing indoor air quality and safe entertainment in sports halls , while using thermal bases to improve the quality of ventilation in the elements.
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- A pvc pipe with a flowing water is located above the ground calculate the overall coefficient of heat transfer based on convection inside , conduction in the pvc and convection and radiation outside. Given Di, Do , L , k, ho ,hi ,Ti , Tsurr ,Ts ,E, and everything else that is obvious .What external data can I use to support the claim that the consumers living within regions with hot climate will buy the stainless steel pan with digital thermometer reading that is powered by the heat generated while cooking and that sales will be higher in summer?Examples of external data I can use to support the claim that the consumers living within regions with hot climate will buy the stainless steel pan with digital thermometer reading that is powered by the heat generated while cooking and that sales will be higher in summer.
- How do I set up equations for a mass connected to a wall by a spring and a damping pot, which then has a force applied to it?Estimate the volume of your kitchen oven and guess how many Watts it takes to pre-heat the air in your oven from 22 °C (72° F) to 221 °C (~430° F)? If the amount of steel that is heated in the inside of the oven totals 3 kg, how many Watts additionally does it take to pre-heat that? Time your oven to preheat and estimate the average Q needed.partb
- Question 1: In your own words, write down the differences between thermodynamic and heat transfer. (3 Marks) Question 2: Estimate the heat loss per square metre of surface through a brick wall 0.5 m thick when the inner surface is at 400 K and the outside surface is at 300 K. The thermal conductivity of the brick may be taken as 0.7 W/mK. (2 Marks) Question 3: A furnace is constructed with 0.20 m of firebrick, 0.10 m of insulating brick, and 0.20 m of building brick. The inside temperature is 1200 K and the outside temperature is 330 K. If the thermal conductivities are as shown in the figure below, estimate the heat loss per unit area. (5 Marks) 1200 K 330 K Fire brick X=0.20 m Insulating brick x=0.10 m Ordinary brick X=0.20 m k = 1.4 k = 0.21 k = 0.7 (WimK)Consider you have four long, 2 cm diameter rods, one each made of copper, steel, wood, and glass. They are to be cooled from a high temperature for 10 minutes. If you want to describe how the temperature changes with time, what approach is best for each of these rods. Balance solution accuracy against efficiency and justify with rules of thumb givenThe thermal conductivities of wood is kwood = 0.1W/(m°C)and air is kair = 0.0234W/(m°C). Part A If the temperature of the room is 20°C and outside is 10°C, find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm. O 60 W O 304 W O 34 W O 200 W O 100 W Submit Request Answer Part B The wall of wood with thickness of 5cm is now replaced with two layers of wood and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1cm. The rate of heat flow will, decreases. increases. stay the same. Submit Request Answer Part C The temperature in the air gap will be, O 20°C, between 10°C and 20°C, O 10°C,
- The composite R-value of a wall is R-16. How many Btu will transfer through one square foot of surface when the indoor air temperature is 70o F and the outdoor air temperature equals 20o Fahrenheit?Let's say a 3.0 gram copper wafer is dropped from a height of 50.0 meters. If 60% of the potential energy lost in the drop could be converted to thermal energy used to heat the copper from an initial temperature of 25 degrees celsius, what would the final temperature of the copper wafer? Would the answer be different if the wafer has a mass greater than 3 grams? Note: the specific heat of copper is 387 J/(kg*K). The temperature is between 25.8 and 26.0 degrees celsius, yes the bigger the mass the greater the energy. O The temperature is between 25.6 and 25.8 celsius, answer does not depend on mass. O The temperature is between 25.0 and 25.2 celsius, answer does not depend on mass. O The temperature is 25.5 and of course the more mass something has the greater energy will be needed to raise the temperature. The temperature is 26.2 and if the mass is doubled so will be the change in temperature. O The temperature is 25.9 degrees celsius and the answer does not depend on mass. O The…R Value: Wall: 0.961m2k/w Floor: 0.676m2k/w Roof: 0.7465m2k/w In a table format show with calculations and research how much money you can save by installing a 115mm layer of insulation (R2.9) in your walls, floor and ceiling over a 5 and 10 year period. Consider the capital costs. Hint: State the current R value of each component. Convert to U value. Calculate new R value of each component (walls, floor and ceiling). Convert to U value. Use Q(W)=A*(change in U)*temperature change. Determine price for installation of new insulation. Determine price saved based on less heat loss through each component separately, then add all values together, and calculate per 5 years and per 10 years. Present all of this information in a table. You do not need to draw any diagrams, simply add the R value in series with your current components R values. Assume the energy cost is 25 cents kWh