A heating system load is 250,000 BTUh. How much heating water flow is required to satisfy...
9-1 The above office requires 2,000,000 BTUH heating for exterior zones. A hot water heating system with a circulating pump is used for water circulation. Assume Heating coils have inlet temp 180 F outlet temp 140", and pump head is 30 FT. Answer the following questions: (3 points) (a) The required total hot water flow rate in GPM (b) BHP if the pump selected has an efficiency of 50% (c) what is the water main pipe size 9-1 The above...
A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system will be used. A 2-in type M copper tubing will be selected for baseboard. Supply temperature (temperature of water leaving the boler) is 220° F and an overall system temperature drop of 300 F is permitted. Determine: a. Water temperature at exit of Unit #1(OF), b. Water temperature at the entrance of unit # 5 (OF) c. Flow rate in Unit # 5 (GPM),...
h A hot water heating system pumps water through a fired heater (furnace) then to a convector to transfer the heat to the room air. (In a real system there would be many convectors in parallel / series, but we have simplified the system to make the details easier to manage.) The piping is 2 inch schedule 40 commercial steel (roughness 0.05 mm) with a total length of 100 m The furnace and the convector can be represented by minor...
Problem 4.049 A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. The inlet pressure and temperature are 14.7 lbf/in., and 180°F, respectively; at the exit the pressure is 90 lbf/in. The pump requires 1/35 hp of power input. Water can be modeled as an incompressible substance with constant density of 60.58 lb/ft and constant specific heat of 1 Btu/lb OR Neglecting...
roints: hing: (LO2, 10 Marks) A solar water heating... (LO2, 10 Marks) A solar water heating system is used to heat 5000 liters of water. The system uses 10 parabolic trough collectors each of 2m x 3m in size. The collector's efficiency is 85%, If the average solar irradiance is 610 W/m2, answer the questions. n Match Question Items Answer Items AA. What is the power received by the parabolic troughs in kW as an input? A. 37 B. -...
How much heat is required to raise the temperature of 28.0 g of water from −35 °C to 145 °C?
2. Internal Viscous Flow a) Pumps are used to circulate hot water through a home heating system. Summarize, in your own words, all the forces the pump must overcome to maintain a constant flow rate. Use the vector form of the Navier-Stokes equation to prove your answer. b) Apply the solution methods you learned to solve the following engineering problem: Water flows steadily through a smooth, circular, horizontal pipe. The discharge rate is 0.04 m/s and the pipe diameter is...
1. (8pts) Heating load represents the amount of heat that needs to provide to a room to maintain a designed indoor temperature. The main heat loss is the heat transfer via building envelope (exterior walls and roof) and windows. Assume you are required to design a heating system for a building, and the first task is to compute the building loads. In your analysis, would you prefer to treat this as a transient or steady-state heat transfer problem? Also, would...
Water circulates throughout a house in a hot water heating system. If the water is pumped at a speed of 0.5 -- through a 2 cm diameter pipe in the basement under a pressure of 3 atm, what will be the flow speed and pressure in a 1.3 cm diameter pipe on the second floor 5 m S above?