Describe the following HVAC systems. a) All-air systems b) All-water systems c) Air-water systems Graphically represent each system with a sketch.
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Describe the following HVAC systems. a) All-air systems b) All-water systems c) Air-water systems
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Graphically represent each system with a sketch.
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- The following air streams mix in a building’s HVAC system upstream of the HVAC heating unit: 1,600 CFM outdoor air at 35°F and 70% RH mixes with 3,500 CFM of return air at 70°F and 40% RH. Assume the HVAC runs for 1 minute, so CFM is the same as cubic feet. a) What are the temperature and RH of the combined air stream? b) How much energy (units of BTU) does the HVAC heating unit need to add to the combined air stream to condition it to 80°F and 60% RH? c) If the conditioned air stream from the heating unit then mixes with 28,000 CFM of air at 70°F and 40% RH provided to the building from another source, what are the combined temperature and RH of the air in the building?3- State which of the following statements are TRUE? a) For a backward curved blade, the fan total pressure (FTP) increases as flow rate increases b) For a backward curved blade, the fan total pressure (FTP) reaches a maximum at a particular flow rate c) When the air filter in the air conditioning duct becomes dirty, the speed has to be increased to maintain the balance between fan and duct systems d) When the damper installed in the duct is opened more, to maintain the balance, the speed of the fan should be increasedintake vaive iii) iv) intake vi) on covers the compression laru Tuel injector power The diagrams show the cylinder of a petrol engine in 4 stages. Petrol vapour and air are drawn into the cylinder, The mixture is then squeezed together, and then exploded by a spark. The explosion pushes down the piston. The exhaust gases are then expelled from the cylinder. exnaust vaive 010 Use the first law of thermodynamics to analyse the energy changes during the process. At each stage explain what happens to the pressure of the gas; exhaust the temperature of the gas; the number of molecules in the cylinder; the internal energy of the gas; the work done on or by the gas: the thermal energy exchanged with the environment. [AC 4.3]
- Which statement is correct for a compressed air tank? a) As the temperature decreases, the pressure and mass of the air decrease. b) As the temperature decreases, the volume increases. c) As the temperature decreases, the volume decreases. d) None of the above.Can someone help me fill out this worksheet please?This device is responsible for passing outside air over the water to remove the heat from the system. a) capacitor b) evaporator c) cooling tower In this type of reciprocating compressors, the compressor shaft and the electric motor shaft are the same part. b) open c) semi-hermetic a) hermetic
- Which of the followings is NOT associated with air treatment stages in creating compressed air? a) Filtration b) Lubrication c) Evaporation d) ConensationWhat would an isometric of the oxygen piping system below look like, where PSA GEN = Pressure Swing Adsorption Oxygen Generator (PSA) COMPs = Compressors POMPs = Pumps HEAT = Heat Exchanger PV = Flow Valves ST TANK = Storage Tank VENT = Vent DR = Drains PSV = Pressure Relief Valve In addition, what would be the possible problems that would require flexibility correction by adding expansion joints, spring supports, anchors and brackets?help with E and F. thx.
- Create a Refrigeration Cycle Steps: You can start at an point in the cycle in the picture, but you must follow this order and you must make it through the entire cycle. The following must be included also and explained /defined Evaporation, Condensation, Fan for the Condenser and Blower for the evaporator. Provide good information12) Which one of the following is an open water system?A: Cooling towerB: Air cooled chiller systemC: Sea water cooled chiller systemD: Direct expansion systemWhat are the characteristics of oil pumps for boilers and engine generators? Select all that apply. A) They are self-priming. B) They are positive displacement. C) They are centrifugal or axial. D) They use pistons or gears. Which of the following methods are used to change pump flow to match load in an operating system? Select all that apply. A) Staging of multiple pumps. B) Variable-speed drive. Who sets standards for water quality? Select all that apply. A) National Institutes of Health. B) The Environmental Protection Agency. C) Local health departments. D) Department of Homeland Security. When would the peak load demand for an office building likely occur? A) Around quitting time on a summer afternoon. B) Noontime in summer. C) Start of the business day. Which of the following fires would constitute a Class B fire? 2) A) Involving combustible metals, such as magnesium. B) Involving wood, cloth, paper, rubber, and many plastics. C) Involving flammable liquids, oils, greases, tars…