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Carry out the preliminary thermal design of a vaporcompression cycle heat pump that uses a solar collector as the heat source.
Use Refrigerant-134a as the working fluid, and assume an average solar flux of 496 Btu per square foot per day in December (the worst case) with a yearly average solar flux of 1260 Btu per square foot per day. The heat pump must provide 400. × 103 Btu per day to a house during December and average 200. × 103 Btu per day during the year. Be sure to determine the following items in your analysis:
a. The required collector surface area for worst case and average conditions. (Is either too large for an average roof?)
b. The resulting system coefficient of performance.
c. The required mass flow rate of R-134a. Note: Assume a solar flux (sunshine) period of 8 to 10 hours per day.
how many kcal are needed to change 5.00 g of water at 25.0 degrees celsius to steam at 100.0 degrees celsius? the
Question- Iron(II) in aqueous solution can be quantities by anoxidation- reduction process using dichromate,Cr2O72-, Cr2O72-(aq) + 6Fe2+(aq) +14 H+(aq) ? 2Cr3+ (aq) + 6Fe3+(aq) +7H2O Write the balanced half reactions for the oxidation of Iron (II)..
Arrange the following elements in order of INCREASING atomic size AND explain how you know the order
Question- A solution 0.025 m ba2+. If 9.7 g of na2co3 is added to 1.0 l of this solution, what percentage of ba2+ remains in solution
when 31g of phosphorus reacts with oxygen, 71g of an oxide phosphorus is the product. What mass of oxygen is needed to produce 13g of this product?
A standard solution of sodium hydroxide has a molar concentration of 0.128M. You use 25.00ml of a solution of hydrochloric acid and this requires 32.75ml of the standardized sodium hydroxide solution to reach the endpoint. WHAT IS THE molar concen..
a sample of gas in a rigid container at 30 degrees celsius and 2.00 atm has its temperature increased to 40.00 degrees
a researcher suspects that the pressure gauge on a 49.9-l gas cylinder containing nitric oxide is broken. an empty gas
Estimate the vapor pressure at 45 degrees C using the Clausius-Clapeyron equation and the two given data points.
Explain what is the freezing point of 50 percent by weight solution of ethylene glycol, C12H6O2 in water (anitfreeze) Mol. Wt. of ethylene glycol is 62.0 g/mol. State what 50 percent ethylene glycol means to get the masses to use
What is the solute and solvent of Antifreeze? What is the solute and solvent of Pepsi? What is the solute and solvent of Sterling Silver?
Calculate the solubility of Ba(IO3)2 in a solution containing 200 mL of .010M Ba(NO3)2 and 100 mL of .10M NaIO3. Ksp Ba(IO3)2 = 1.57 x 10^-9
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