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BSCI 4750 VERIFIED ACCURATE STUDY GUIDE
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Law One of Thermodynamics - Answers - Heat cannot be destroyed but it can be moved or transformed Law Two of Thermodynamics - Answers - Heat will naturally move from areas of high concentration (hotter) to areas of low concentration (colder) Latent Heat - Answers - Exists in the water vapor carried in air Quantity of air required is determined by - Answers - number of occupants, type of activities TETD - Answers - Temperature Equivalent Temperature Difference R Factor - Answers - resistance for a material to transfer heat R Total - Answers - Sum of all components in an assembly to resist transfer of heat U Factor - Answers - Ability for a material to conduct heat U Total - Answers - sum of all the components in an assembly to conduct heat. Internal Loads - Answers - people, lights, appliances, motors, food preparation Refridgeration - Answers - The process of moving heat from an area where it is undesirable to an area where heat is not objectionable Refridgeration System - Answers - A closed system that controls the pressure and temperature of a refrigerant to regulate the absorption and rejection of heat by the refrigerant Traditional Split system design - Answers - One condensing unit for every evaporator Difference - Answers - One condensing unit serves several evaporators What do chillers do - Answers - use air to condense the refrigerant Chilled Water System Components - Answers - Chillers, Pumps, Air Handlers, Cooling Tower, Water Treatment Air Side Heat Pumps - Answers - reverse the refrigeration cycle Geothermal - Answers - In the summer it transfers heat to the ground, in the winter is extracts heat from the ground
Passive Chilled Beams - Answers - Air conditioned outside air is introduced to the space at a different location Active chilled beams - Answers - conditioned outside air is introduced into the chilled beam unit CAV vs VAV - Answers - Constant Air Volume, air temp varies Variable air volume, air temp is constant Fossil Fuel Types - Answers - Natural Gas, Propane, Oil Building automation - Answers - Control of the energy and resource using devices in a building for optimization of building system operations Building automation system - Answers - system that uses microprocessors to control the HVAC equipment and other systems in a building Distributed direct digital control system - Answers - Building automation control system where each controller has its own central processing unit (CPU) BAS Controllers - Answers - web-based, supervisory controllers, application-specific controllers, and fully programmable controllers Web based supervisory controller - Answers - a controller that is connected to a building IT Network and accessed from a standard web browser, perform functions such as operator access, data trending, alarms, and time scheduling Application specfic controller - Answers - controller designed to control only one category of HVAC System Types of ASC - Answers - VAV air terminal controllers and packaged unit controllers used for controlling rooftop units and heat pumps Fully Programmable controller - Answers - can be customized to control any HVAC Device in a building BAS Input - Answers - is a sensor that indicates building or equipment conditions to a BAS Controller Analog input device - Answers - sensor that indicates a variable such as temperature, pressure, or humidty and causes a aproportional electrical signal at BAS Controller Digital input device - Answers - sensor that produces only on and off signals