Coll A liquid heating system with a one-cover selective collector with emittance of 0.2 is set...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Coll A liquid heating system with a one-cover selective collector with emittance of 0.2 is set up to preheat water from the mains and supply it at T, to a boiler, as shown in the accompanying diagram. The characteristics of the system are as follows: 1020 W/C Zumt 1120W/C FR(Ta), = 0.73 FRUL = 5.10 W/m² °C Heat exchanger effectiveness 0.60 Capacitance rate on collector side 1020 W/°C Capacitance rate on tank side 1120 W/°C Collector area 20 m² Tank capacity 1000 liters Tank UA 6.0 W/°C Supply water temperature 11°C Initial tank temperature 35°C Hour 10-11 11-12 12-1 1-2 Tank T, The meteorological data and load flow rate for a 4-h period are shown in the following table: IT, MJ/m² 0.09 1.75 3.45 2.75 Ta, °C 14 17 18 20 To boiler From supply, at 11c Load Flow, kg 150 150 0 150 Make the following assumptions: The controller turns the pump on whenever energy can be collected. The (Ta) for the hours in question are the same as (ta)n. All quantities in the table are constant at their averages over each hour. The tank is fully mixed. The tank is in a room at a constant temperature of 20°C. Calculate: a The tank temperature at 2 PM. b The integrated energy balance (over the 4 h) on the tank. Coll A liquid heating system with a one-cover selective collector with emittance of 0.2 is set up to preheat water from the mains and supply it at T, to a boiler, as shown in the accompanying diagram. The characteristics of the system are as follows: 1020 W/C Zumt 1120W/C FR(Ta), = 0.73 FRUL = 5.10 W/m² °C Heat exchanger effectiveness 0.60 Capacitance rate on collector side 1020 W/°C Capacitance rate on tank side 1120 W/°C Collector area 20 m² Tank capacity 1000 liters Tank UA 6.0 W/°C Supply water temperature 11°C Initial tank temperature 35°C Hour 10-11 11-12 12-1 1-2 Tank T, The meteorological data and load flow rate for a 4-h period are shown in the following table: IT, MJ/m² 0.09 1.75 3.45 2.75 Ta, °C 14 17 18 20 To boiler From supply, at 11c Load Flow, kg 150 150 0 150 Make the following assumptions: The controller turns the pump on whenever energy can be collected. The (Ta) for the hours in question are the same as (ta)n. All quantities in the table are constant at their averages over each hour. The tank is fully mixed. The tank is in a room at a constant temperature of 20°C. Calculate: a The tank temperature at 2 PM. b The integrated energy balance (over the 4 h) on the tank.
Expert Answer:
Related Book For
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
Posted Date:
Students also viewed these accounting questions
-
> MyLab Math Course Home | SchoMathway | Algebra Problem Solve X C dadeschools.schoology.com/external_tool/2421768184/launch English 76F Clear Grades Members cos(a)=4/5, a lies in quadrant IV, X...
-
a. Example 13-1: Batch Reactor with an Exothermic Reaction Wolfram 1. Adiabatic Case: Use Wolfram to see whether you can find a trajectory that is ready to ignite and whose trajectory looks like a...
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-5. Ivan's grandfather died and left a portfolio of municipal bonds. In 2012, they pay Ivan...
-
In programming challenge 8 of chapter 3, you created an application that converts celsius temperatures to fahrenheit. recall that the formula for performing this conversion isf = 1.8 * c + 32in the...
-
Suppose that in a recent market period, the following relationship existed between the price of Bluray discs and the quantity supplied and quantity demanded. Graph the supply and demand curves for...
-
Globetron manufactures components for use in small electronic products such as computers, CD players, and radios at plants in Belgium, Germany, and France. The parts are transported by truck to...
-
4. Question: Hey, Paula," a pop hit that spent months on the music charts, was back on the radio 30 years later, but in a form the song's author never intended. Talk-show host Rush Limbaugh played a...
-
1. Identify waste in the current production process. 2. How does the pager suggestion eliminate waste? 3. Have the students and Mr. Alvarez found the root cause of the cart problem? Why or why not?...
-
A firm had merchandise inventory of $46,500 on January 1, 20X1. During the year the firm had purchases of $56,000, freight in of $600, purchases returns and allowances of $3,400, and purchases...
-
Karakomi Cameras Inc. has a Disposables Division that produces a camera that sells for $15.00 per unit in the open market. The cost of the product is $13.10 (variable manufacturing of $5.00, plus...
-
21. a. Is it possible for an individual in a workplace to behave in a way that is exhibiting political behaviour but that can also be considered ethical behaviour? If yes, create and explain such a...
-
Based on the Solow-Swan growth model, show and explain how the saving rate determine the steady state capital per worker. Using a diagram of Solow-Swan growth model, explain why an economy should not...
-
Give a value of c that makes each of the following limits equal to -co. 3x+2x+4 (a) lim x1x 8-xc
-
How do hormones influence developmental processes, including cell fate determination, tissue differentiation, and morphogenetic patterning, and what are the key regulatory networks involved in...
-
Liquidating Partnerships Prior to liquidating their partnership, Ellis and Montgomery had capital accounts of $ 4 0 , 0 0 0 and $ 8 0 , 0 0 0 , respectively. Prior to liquidation, the partnership had...
-
3. In the following market model, P, is price in time t, S and D are supply and demand functions. Assume that supply in year t depends on price in year t-1, S (Pt-1) = aPt-1 and that demand function...
-
There exists a Switch class that stores two objects, of the same class and is used to get the objects in alternating order. Currently this class is implemented by storing data using the Object class...
-
You purchase a bond with a coupon rate of 6.7 percent, a par value $1,000, and a clean price of $905. Assume a par value of $1,000. If the next semiannual coupon payment is due in two months, what is...
-
Investigators studying the mass transfer from single spheres recommended the generalized equation Sh = 2.0 + C Re m Sc 1/3 As discussed in Section 30.1, the value of 2.0 can be derived theoretically...
-
Determine the diameter of the glass tube necessary to keep the capillary-height change of water at 30C less than 1 mm.
-
A baseball has a circumference of 9¼ in. and a weight of 5¼ ounces. At 95 mph determine a. The Reynolds number b. The drag force c. The type of flow (see the illustration for Problem...
-
Prepare a consolidated balance sheet from the following details as at 31 March 2006. During the year, Pa sold goods which had cost 1,900 to Daughter for 2,800. None of these goods had been sold by...
-
The following information relates to Heather Limited and its subsidiary, Thistle*Limited. 1. Heather Limited Retained profits as at 31 March 2008 700,000. 80,000 ordinary shares were purchased in...
-
Draw up a consolidated balance sheet as at 31 December 2007 from the following: At the balance sheet date, Child owes Parent 3,200. During the year Parent sold goods which had cost 6,000 to Child for...
Study smarter with the SolutionInn App