Objective question :- The function of air conditioning system is (A) Cooling and humidification (B) Cooling...

Objective question :-

The function of air conditioning system is

(A) Cooling and humidification
(B) Cooling and dehumidification
(C) Heating and humidification
(D) Heating and dehumidification

Expert Solution

samet mamat answered 2 years ago

Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since the...

Chlorodifluoromethane (CHF2Cl) was widely used in the compression/cooling circuits of refrigeration or air-conditioning systems. Since the discovery that such compounds (HCFCs and CFC's) released into the atmosphere were a major cause of depletion of stratospheric ozone, newer refrigeration systems make use of certain hydrofluorocarbons (HFCs), which are degraded in the lower atmosphere, instead. Often, mixtures of such compounds are used. Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane (C2HF5) and difluorormethane (CH2F2) has...

In an air conditioning system, the inside and outside conditions of air are 25 °C DBT...

In an air conditioning system, the inside and outside conditions of air are 25 °C DBT and 50% RH, and 40 °C DBT and 27 °C WBT, respectively. The room sensible heat ratio is 0.8, while 50% of the room air is rejected to atmosphere and replaced with an equal quantity of fresh air before entering the air conditioning apparatus. If the fresh air added is 100 m3 /min and the air density is 1.2 kg/ m3 with zero air...

The flow rate of warm air into the air conditioning is 5,000 cfm. An air conditioning...

The flow rate of warm air into the air conditioning is 5,000 cfm. An air conditioning system takes outdoor air at 95 degrees F dry-bulb and 70% relative humidity, and discharges it at 60 degrees F dry-bulb and 95% relative humidity. The air conditioning system operates on a vapor compression cycle using R134a between 20 and 200 psia. Refrigerant enters the compressor at 20 degrees F and leaves the compressor at 180 degrees F. Refrigerant enters the evaporator coil at...

An air conditioning system is to take outdoor air at 30 oC and 70% relative humidity...

An air conditioning system is to take outdoor air at 30 oC and 70% relative humidity at a steady rate of 10 m3/s and to condition it to 25 oC and 50% relative humidity. The outdoor air is first cooled down to 13.9 oC using cooling coil and then heated to the desired condition in the heating section. Assuming the air is at 1 atm pressure, Draw the air conditioning process on the attached psychometric chart. Determine the mass flow...

In an air-conditioning system, dry air flows over tubes carrying refrigerant R134a. The air is cooled...

In an air-conditioning system, dry air flows over tubes carrying refrigerant R134a. The air is cooled by transferring heat to the R134a; the air enters with a volume flow rate of 0.75 m3 s–1 at 305 K and 100 kPa, and it exits at 290 K and 95 kPa. The R134a enters at 4 bar in a vapor-liquid coexistence state with a quality of 20%; it exits at 4 bar and 30 °C. Ignoring heat transfer at the outer surface...

Moist air enters an air-conditioning system as shown in the figure below at T1 = 28°C,...

Moist air enters an air-conditioning system as shown in the figure below at T1 = 28°C, ?1 = 85% and a volumetric flow rate of (AV)1 = 0.89 m3/s. At the exit of the dehumidifying section, the air is saturated, ?2 = 100%, and the condensate leaves this section at the same temperature as the moist air. At the exit of the heating section the moist air is at T3 = 24°C, ?3 = 50%. The system operates at steady...

An air-conditioning system operates at a total pressure of 1 atm and consists of a heating...

An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and an evaporative cooler. Air enters the heating section at 15°C and 55 percent relative humidity at a rate of 30 m3/min, and it leaves the evaporative cooler at 25°C and 45 percent relatively humidity. Using appropriate software, study the effect of total pressure in the range 94 to 100 kPa and plot the results as functions of total pressure. (Please upload your...

Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C with a mass flow...

Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C with a mass flow rate of 1.5 kg/s. The air is cooled by exchanging heat with a stream of R-134a refrigerant that enters the heat exchanger at -8C and 20% quality, and exits with 100% quality. If 25 kW of heat is transferred out of the air, determine: (40 pts) i) Mass flowrate of R-134a (kg/hr) ii) Exit temperature of air (C) iii) Exit pressure of R-134a (kPa)

what is the primary difference between a forced air system that provides both heating and cooling,...

what is the primary difference between a forced air system that provides both heating and cooling, and one that just provides heating?

5. You are an air-conditioning systems designer, and you have been tasked with developing an air-conditioning...

5. You are an air-conditioning systems designer, and you have been tasked with developing an air-conditioning system (cooling only) for lecture theatre building 32 on ECU’s Joondalup Campus. As a first step you will need to develop a model of the system, explain how you would go about this by providing answers to the following: a. The steps that you would take when developing a mathematical model of the system and what information you would need b. List all of...

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