Determine the mass flow rate of air

Assignment Help Mechanical Engineering

Reference no: EM13949739

1. Refrigerant 134a at a flow rate of 0.5 lb/s enters a heat exchanger in a refrigeration system operating at steady state as saturated liquid at 08F and exits at 208F at a pressure of 20 lbf/in.2 A separate air stream passes in counterflow to the Refrigerant 134a stream, entering at 1208F and exiting at 778F. The outside of the heat exchanger is well insulated. Neglecting kinetic and potential energy effects and modeling the air as an ideal gas, determine the mass flow rate of air, in lb/s.

2. Oil enters a counterflow heat exchanger at 450 K with a mass flow rate of 10 kg/s and exits at 350 K. A separate stream of liquid water enters at 208C, 5 bar. Each stream experiences no significant change in pressure. Stray heat transfer with the surroundings of the heat exchanger and kinetic and potential energy effects can be ignored. The specific heat of the oil is constant, c 5 2 kJ/kg ? K. If the designer wants to ensure no water vapor is present in the exiting water stream, what is the allowed range of mass flow rates for the water, in kg/s?

Reference no: EM13949739

Questions Cloud

What is skellys variable cost ratio : What is Skelly's variable cost ratio? What is its contribution margin ratio? How much sales revenue must Skelly earn to break even? What is the expected margin of safety?

How many bottles of water a day should the average human : How many bottles of water a day should the average human drink?

Determine the mass flow rate at inlet : Ignore heat transfer with the surroundings and all kinetic and potential energy effects. If the mass flow rate of the liquid entering at inlet 1 is m# 1 5 3.2 3 105 kg/h, determine the mass flow rate at inlet 2, m# 2, in kg/h.

Compute the break-even point in units and in revenues : Compute the break-even point in units and in revenues. Suppose that the selling price increases by 10 percent. Will the break-even point increase or decrease? Recompute it.

Determine the mass flow rate of air : A separate air stream passes in counterflow to the Refrigerant 134a stream, entering at 1208F and exiting at 778F. The outside of the heat exchanger is well insulated. Neglecting kinetic and potential energy effects and modeling the air as an idea..

The maintenance margin is 35 percent : You decide to buy 1,600 shares of stock at a price of $64 and an initial margin of 50 percent. What is the maximum percentage decline in the stock before you will receive a margin call if the maintenance margin is 35 percent? (Do not round intermedia..

Using the effective listening guidelines in the text : Using the effective listening guidelines in the text, make three suggestions that would allow Alan to fulfill his responsibility to provide employees with critical feedback about performance and to establish a supportive climate?

What types business problems use anova in research issues : Could you please help me with four examples of ANOVA analysis that would be used in the business world? What types of business problems would use ANOVA in research issues, problems or opportunities in figuring out business issues?

Why are t-bond returns high when the market returns are low : "Why are t-bond returns high when the market returns are low"

User Account

All Pages