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Full-Text Articles in Engineering
Upgrading Unlv's Astm E477 Test Facility To Meet The Current Standards Of Astm E477, Ronn Fojas
Upgrading Unlv's Astm E477 Test Facility To Meet The Current Standards Of Astm E477, Ronn Fojas
UNLV Theses, Dissertations, Professional Papers, and Capstones
A by-product of Heating, Ventilation, and Air-conditioning (HVAC) systems is noise that is produced by fans, compressors, and other related equipments and the noises from the turbulence that is created by moving air. Sometimes, it is impractical to modify the sources of the noise, which requires designers to modify the path of the noise, the duct system. These modifications might include installing an in-duct silencer or acoustical lining on the inside walls of the ducts. The testing and the precise quantification of the performance of these silencers and duct linings are necessary for any designer to be able to make …
Plug-In Hybrid Electric Vehicle Hvac Optimization, Jessica Hartl
Plug-In Hybrid Electric Vehicle Hvac Optimization, Jessica Hartl
Honors Theses
The objective of the proposed project is to convert the current heating ventilating and air conditioning system, or HVAC system, on the plug in hybrid Toyota Prius into a completely electric system. As the vehicle is now, the gas engine is required to provide heat loss for the forced air heating system on extremely cold days. The data, which has been gathered over several years, shows a drop in MPG equivalence from approximately 100-120 MPG on ideal days (70° F) to about 50 MPG equivalence on cooler days. This problem can be solved by increasing the effectiveness of the HVAC …
Investigation Of A Water Desalination Method Via A Humidification-Dehumidification Process Using Hvac Technology, Juan Antonio Cornejo
Investigation Of A Water Desalination Method Via A Humidification-Dehumidification Process Using Hvac Technology, Juan Antonio Cornejo
Open Access Theses & Dissertations
Potable water is becoming a scarce resource in many arid regions of the world. An experimental unit was designed and constructed to examine and characterize the production capabilities of a humidification-dehumidification (HDH) desalination process. An HDH cycle offers a viable, technologically light, alternative for producing fresh water from brackish water because the low relative humidity air is infused with water vapor through evaporation by means of conventional heating, ventilation and air conditioning (HVAC) components. The evaporation process effectively separates salts and suspended solids from the brackish feed-water. Desalinated water is subsequently recovered by extracting the water vapor from the moist …
Simulation And Experimental Validation Of Airborne And Structure-Borne Noise Transmission In Hvac Plenums, Srinivasan Ramalingam
Simulation And Experimental Validation Of Airborne And Structure-Borne Noise Transmission In Hvac Plenums, Srinivasan Ramalingam
Theses and Dissertations--Mechanical Engineering
This research demonstrates the usage of numerical acoustics to model sound and vibrational energy propagation in HVAC ducts and plenums. Noise and vibration in HVAC systems propagates along three primary paths that can be classified as airborne direct, airborne indirect and structure-borne. The airborne direct path was simulated using acoustic FEM with special boundary conditions to handle the diffuse acoustic field loading and the baffled termination. The insertion loss for a number of different plenum geometries was compared to published measurement results. Results were in good agreement both below and above the cutoff frequency. Additionally, the airborne indirect path, often …