AREN 3050 Environmental Systems for Buildings I Fall 2005 Project #3: Residential HVAC System Design Due Tuesday, 29 November 2005 The objective of this project is to design the HVAC system for a low-income residence. You may work in teams of up to three students. The building has the following floor plan and is located in suburban Washington, D.C.AREN 3050 Environmental Systems for Buildings I Fall 2005 Heating and cooling loads for each room of the residence have been calculated and are summarized in the following table. Room Heating Load (Btu/hr) Sensible Cooling Load (Btu/hr) Living Room 7138.5 5353.8Kitchen 5661.5 4246.2Bedroom 1 5000.0 3750.0Bedroom 2 4600.0 3450.0Bedroom 3 4600.0 3450.0Bathroom 1 2692.3 2019.2Bathroom 2 1015.4 761.5Laundry Room 1292.3 969.2 32,000 24,000 Notes: • The loads associated with the closets and hallway have been integrated into the other rooms. You should not deliver supply air to the hallway. • Note that you may need more than one diffuser in some of the rooms • In the text example, supply outlets in the kitchen and bathroom were integrated into the base of the cabinetry. It is also quite acceptable to have diffusers in the floor. • The room dimensions, somewhat legible in the figure, are give interior room dimensions. • Assume that the house has a crawl space and that both the ductwork and HVAC equipment are in the crawl space. The furnace is installed horizontally and has a total length, including the cooling coil, of 60 inches. • You should use a standard size of 12” x 2.5” for outlet diffusers. • The return grilles should be mounted on the wall at floor level and have a size of 12”x6”. • Your return duct system should have at least two return grilles – one in the living room or kitchen and at least one in, or near, the bedrooms, possibly in the hallway. Your task for this project is to design a supply and return duct system to deliver 1200 cfm with a total duct system pressure drop of no more than 0.15 inWG (inches of water): Feel free to email me ([email protected]) a pdf file of your layout before November 23 for feedback on the placement of diffusers and overall layout of your system. Deliverables Your submittal should take the form of a technical report. Your report should include the following elements: 1. A one-page summary giving project objective and overall conclusions. 2. A step-by-step description of your design methodology. 3. Detailed calculations used to determine your design. 4. Calculations of the actual pressure drop through the designed duct system. 5. A one-line drawing showing the supply and return duct layout and all. Fittings should be labeled on the drawing. 6. A scaled drawing, with sizes and flows, of your supply and return duct system design.AREN 3050 Environmental Systems for Buildings I Fall 2005 Project #3 Evaluation Names: Overall Presentation /10 Organization Grammar and Writing Supply Duct System Layout /15 Overall layout Diffuser placement Fitting selection Drawing Return Duct System Layout /15 Overall layout Grille placement Fitting selection Drawing Supply Duct System Sizing /30 Methodology Effective length calculations Available pressure calculations Branch duct size calculations Trunk duct size calculations Drawing Return Duct System Sizing /25 Methodology Effective length calculations Available pressure calculations Branch duct size calculations Trunk duct size calculations Drawing System Pressure Drop Calculation /5 Calculations Total: