Determine the maximum possible COP if heat is extracted from the outside atmosphere at (a) 10 °C, (b) 0°C, (c) –10 °C, and (d) -40 °C. Express each COP numerically to three significant figures, separated by commas.
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- Q8): To find how much heat is required to bring a kettle of water to its boiling point, you are asked to calculate the specific heat of water at 61°C. The specific heat of water is given as a function of time in Table below. Temperature, T Specific heat, C₂ (°C) J kg-°C 22 42 52 82 100 4181 4179 4186 4199 4217 Determine the value of the specific heat at 7=61°C using the direct T method of interpolation and a third order polynomial. Find the absolute relative approximate error for the third order polynomial approximation (Lagrange Method).The left side of this equation tells how much energy Q the cylinder gives to the water while it cools. The right side of this equation tells how much energy Q the water and aluminum cup absorb from the cylinder to warm up. Because it is the same energy, they are equal. What is known in this equation? Mcyl 411.7 g, malum 46.5 g, malum+water = 175 g Can you find: mwater =? g Twater = Talum = 20°C (water and cup of room temperature) 90°C, T; = 35°C (hot cylinder and cool "cylinder+cup+water" temperatures) Tcyl kCal Calum = 0.22, Cwater 1 (specific heat of water and aluminum, measured in units kg-°C What are we looking for is Ccul - How we find it? Plug all the numbers into the equation (1), Ccul will be one unknown which you can calculate from the equation. Important, convert all the masses from grams to kilograms! After you find Ccyl, compare it to known value for the copper 0.093(our cylinder is made out of copper). |Ceyl -0.093| % : · 100% 0.093A house is heated and maintained at 20 °C by a heat pump. Part A Determine the maximum possible COP if heat is extracted from the outside atmosphere at (a) 10 °C, (b) 0 °C, (c) –10 °C, and (d) -40 °C. Express each COP numerically to three significant figures, separated by commas. vec ? COP10 °C, COP, •C, COP_10 °C, COP_40 c = Submit Request Answer
- Completely solve and box the final answers. Write legibly 4. A single stage air compressor handles 30 cubic meter per minute of atmospheric pressure, 30°C air and delivers it to a receiver at 3.0 mpa. Its volumetric efficiency is 83.0%, compression efficiency of 83.0% and mechanical efficiency of 80.30%. If it rotates at 300 rpm, what power in kW is required to drive it?A house is heated and maintained at 20 °C by a heat pump. Part A Determine the maximum possible COP if heat is extracted from the outside atmosphere at (a) 10 °C, (b) 0 °C. (c) – 10 °C, and (d) – 40 °C. Express each COP numerically to three significant figures, separated by commas. COP10 °C, COP, °C, COP_10 °C, COP 40 °C = Submit Previous Answers Part B Based on these results, would you recommend heat pumps at locations with a severe climate? Match the words in the left column to the appropriate blankes in the sentences on the right. Reset Help mild 1. Given that a real heat pump is significantly efficient than a Carnot heat pump, the more advantage of a heat pump over electric heating rapidly when the outside temperature becomes really low. increases less 2. As the COP decreases, the heating power decreases 3. A heat pump is ideal for a climate. severe Submit Request Answer25 Question 10 Anwer 2 g of air in a piston cylinder is compressed isothermally. The initial temperature is 399 K, the initial pressure is 7.1 bar, and the final volume is 2.8 litres. What is the heat transfer during the process? Give your answer in Joules to the nearest whole number. Far air co1.005 kJ/kgK and cy- 0.718 kJ/kgK.
- Q1. The following data is obtained during geothermal drilling operation. Rock density = 1550 kg/m ³, heat capacity of the rock = 0.00163 J/kg K, temperature difference = 80 K. How much will be the thermal heat content of the rock at the geothermal site? Discuss about geothermal gradients their importance in energy exploration. Do you think utilization of geothermal energy worldwide is increasing yearly? Justify your answer. Do you think the geothermal energy available in this site can be used for a metal melting industry?You have the six pieces of metal listed below plus a beaker of water containing 400. g of water. The water temperature is 21.0 °C. Metals Specific Heat (J/g. K) Mass (g) 1. Al 0.9002 100. 2. Al 3. Au 4. Au 5. Zn 6. Zn 0.9002 0.1289 0.1289 0.3860 0.3860 50. 100. 50. 100. 50. The specific heat capacity of water is 4.184 J/g °C.%or l. Iu. A A:YA docs.google.com/forms/d/e/1l O مطلوب Untitled Section F1 F2 F3 d a F4 D Consider the following values: - a - 11 m; b - 6 m; - 8 m; d - 3 m; F1 - 3 kN; F2 - 11 kN; F3 - 2 kN; F4 - 20 kN; F5 - 2 kN; a = 30°, e = 60° , B= 30° 1] What is the resultant moment of the five forces acting on the rod about point A? c) - 4.6 KN.m d) 22.9 kN.m e) - 14.1 kN.m f) 21.3 kN.m a) -1.2 kN.m b) 12.7 kN.m 2] What is the resultant moment of the five forces acting on the rod about point B? a) 28.8 kN.m b) 42.7 kN.m c) - 1.6 KN.m d) 10.9 kN.m e) - 1.1 kN.m 1 24.2 KN.m 3] What is the resultant moment of the five forces acting on the rod about point C? a) 63.6 kN.m b) -11.1 kN.m c) 77.4 kN.m d) - 9.1 kN.m e) 24.1 kN.m f) - 85.3 kN.m 4] What is the resultant moment of the five forces acting on the rod about point D? a) 33.6 kN.m b) 83.4 kN.m c) - 1.6 kN.m d) 52.1 kN.m e) 21.1 kN.m f) - 40.1 kN.m 5] What is the moment of the force F2 about point E? a) 80.6 kN.m b) - 8.1 kN.m c) 54.6 kN.m d) 33.1…
- An air-cooled condenser has an expected U value of 30 W/m2∙K based on the airside. The condenser is to transfer 60 kW with an airflow rate of 15 kg/s entering at 35°C. If the condensing temperature is to be 48°C, what is the required airside area in m2? Round your answer to 2 decimal places. heat transferAn expandable container is filled with 25 in of air and is sitting in ice water that is 32 °F. The container is removed from the icy water and heated to get the volume as 6.15 X 10 m. What is the resulting temperature? Select one: O a. 409.82 °C O b. 136.82 °C O C.409.82 °K O d. 136.82 °K1:34 ull Telegram ex ch 2.p... Q1) A turbine model having the following specifications was made to predict the behaviour of the actual turbine: Pt = 15'8 HP H= 12 m N= 474 rpm, Model scale n =10 Determine the speed of the actual turbine runner and its power developed if the overall efficiencies of the turbine and its model are equal. Find the type of turbine of which the model was made. Q2) A model turbine is provided with a runner 2 m in diameter. It is found to develop 64 HP under a head of 100 m when running at a speed- of 4,000 rpm. Calculate the specific speed. It is required to build a similar turbine to develop 200 HP under a head of 120 m. Calculate the required diameter. Prove any formula used. Activa