In calculating the design heating load for a building, the calculation relies on the following for the outdoor temperatu...
In calculating the design heating load for a building, the calculation relies on the following for the outdoor temperature:
Select one:
1. The lowest winter temperature
2. The highest summer temperature
3. Historic temperature data for a given frequency of occurrence
4. Ambient temperature
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In calculating the design heating load for a building, the calculation relies on the following for the outdoor temperatu...
An office building requires the following cooling load: RSCL = 480,000 BTU/hr RLCL 250,000 BTU/Hr Outdoor...
An office building requires the following cooling load: RSCL = 480,000 BTU/hr RLCL 250,000 BTU/Hr Outdoor design condition: 100 F DB and 78 F WB Room Design Condition: 70 F DB, 50 % RH Required Outside Air: 1,800 CFM Supply Air Temperature Difference 30°F (Difference between the room temperature and the supply air temperature) Which one of the following represents the Dry Bulb'temperature of the Supply Air? 40 °F 78 OF 100 °F None of the above
An office building...
a) What is the difference between latent and sensible heat gains in building cooling load analysis?...
a) What is the difference between latent and sensible heat gains in building cooling load analysis? Provide examples of each (2 marks) b) In heating load calculations, it is a normal practice to neglect the solar heat gain Explain why. (2 marks) c) An air conditioned single family detached house with a Figure_Q6A is located in Perth, Australia (Latitude 31° South). The ceiling height is 24 m. The summer floor plan shown in design indoor temperature is 25°C. Outside design...
A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system...
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),...
For a 400 m-area concrete middle floor office space of a muti-story office building located in...
For a 400 m-area concrete middle floor office space of a muti-story office building located in Barcelona, Spain; that is operating from 8:00 a.m. till 4:00 p.m. with 100 m west facing glass and 40 occupants. The space has carpeted floor, one exposed wall, interior gypsum partitions, and drop ceiling find the following @ 3:00 p.m.: a). Cooling load due to Glass (conduction, solar, total). b). Cooling load due to Occupants (sensible and latent). c). Cooling load due to Lighting...
Which of the following is NOT true? Select one: a. The f-chart design method is a...
Which of the following is NOT true? Select one: a. The f-chart design method is a correlation of the results of many hundreds of thermal performance simulations of solar heating systems performed with TRNSYS. b. The f-chart design method can quickly estimate the long-term performance of solar energy systems of standard configurations c. The f-chart design method can be used for a standard air based solar heating system d. The f-chart design method is used to design commercial-type large scale...
AIR HEATING/COOLING HEAT PUMP sketch of a heat pump receiving outdoor air, determine the following. Assume the heat capacity of air is 1.0 kJkg-K. (a) If the supply air mass flow rate and tempera...
AIR HEATING/COOLING HEAT PUMP sketch of a heat pump receiving outdoor air, determine the following. Assume the heat capacity of air is 1.0 kJkg-K. (a) If the supply air mass flow rate and temperature (Point 3) are 0.8 kg/s and 39.7"C, and the return air temperature (Point 4) is 22C, the heating rate of the heat pump is kW. (Express your answer to one decimal place.) itthere is NO heat reco e yurt and 25% of the air is exhausted...
Load Duration Curve A gas-fired boiler system is being design for a new building. The system...
Load Duration Curve A gas-fired boiler system is being design for a new building. The system will consist of 3 identical boilers, each with rated output = 200 kW. The anticipated LDC is shown below. 600 500 Heating Load 400 [kW] 300 200 100 0 The planned operating sequence is as follows: Boiler-1 fires first to meet whatever load it can, up to its capacity. When Boiler-1 reaches its capacity, Boiler-2 fires second and operates to meet whatever load it...
1. For the building shown below, calculate the dead load, reduced live load, and maximum design...
1. For the building shown below, calculate the dead load, reduced live load, and maximum design load per IBC 2012, LRFD load combinations. Beam loads should be in plf, column loads should be in kips. [To be done by hand.] Note: It is acceptable check only equations 16-1 and 16-2 of IBC 2012. a. Beam I b. Веam II olumn A/3-supporting 1 story d. Column B/2- supporting 1 story C e. Column B/2-supporting 4 stories Given loading: Dead Load 60...
To reduce building heating costs, modern building codes in many parts of the country require the...
To reduce building heating costs, modern building codes in many parts of the country require the use of double-pane windows (sometimes, called "double-glazed" or "thermopane" windows). Ivpically, a double-pane window consists of two panes of glass separated by a space that contains trapped stagnant air. In one design of a double-pane window, each glass layer is 0.7 cm thick, the stagnant air layer is 2 cm thick, and the area is 4 m2 In the living room of a large...
4. Commercial building energy analysis. This problem analyzes how large commercial buildings use using data from...
4. Commercial building energy analysis. This problem analyzes how large commercial buildings use using data from the Photonics Center In particular, we want to compare the energy needed to condition the air flowing through the building, with the energy needed to 1) provide heat in the winter to balance the heat loss from the walls to the environment, and 2) provide the necessary cooling in the summer time to overcome the heat gain from the outside air (lets ignore solar...
An office building requires the following cooling load: RSCL = 480,000 BTU/hr RLCL 250,000 BTU/Hr Outdoor design condition: 100 F DB and 78 F WB Room Design Condition: 70 F DB, 50 % RH Required Outside Air: 1,800 CFM Supply Air Temperature Difference 30°F (Difference between the room temperature and the supply air temperature) Which one of the following represents the Dry Bulb'temperature of the Supply Air? 40 °F 78 OF 100 °F None of the above
An office building...
a) What is the difference between latent and sensible heat gains in building cooling load analysis? Provide examples of each (2 marks) b) In heating load calculations, it is a normal practice to neglect the solar heat gain Explain why. (2 marks) c) An air conditioned single family detached house with a Figure_Q6A is located in Perth, Australia (Latitude 31° South). The ceiling height is 24 m. The summer floor plan shown in design indoor temperature is 25°C. Outside design...
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),...
For a 400 m-area concrete middle floor office space of a muti-story office building located in Barcelona, Spain; that is operating from 8:00 a.m. till 4:00 p.m. with 100 m west facing glass and 40 occupants. The space has carpeted floor, one exposed wall, interior gypsum partitions, and drop ceiling find the following @ 3:00 p.m.: a). Cooling load due to Glass (conduction, solar, total). b). Cooling load due to Occupants (sensible and latent). c). Cooling load due to Lighting...
AIR HEATING/COOLING HEAT PUMP sketch of a heat pump receiving outdoor air, determine the following. Assume the heat capacity of air is 1.0 kJkg-K. (a) If the supply air mass flow rate and temperature (Point 3) are 0.8 kg/s and 39.7"C, and the return air temperature (Point 4) is 22C, the heating rate of the heat pump is kW. (Express your answer to one decimal place.) itthere is NO heat reco e yurt and 25% of the air is exhausted...
Load Duration Curve A gas-fired boiler system is being design for a new building. The system will consist of 3 identical boilers, each with rated output = 200 kW. The anticipated LDC is shown below. 600 500 Heating Load 400 [kW] 300 200 100 0 The planned operating sequence is as follows: Boiler-1 fires first to meet whatever load it can, up to its capacity. When Boiler-1 reaches its capacity, Boiler-2 fires second and operates to meet whatever load it...
1. For the building shown below, calculate the dead load, reduced live load, and maximum design load per IBC 2012, LRFD load combinations. Beam loads should be in plf, column loads should be in kips. [To be done by hand.] Note: It is acceptable check only equations 16-1 and 16-2 of IBC 2012. a. Beam I b. Веam II olumn A/3-supporting 1 story d. Column B/2- supporting 1 story C e. Column B/2-supporting 4 stories Given loading: Dead Load 60...
To reduce building heating costs, modern building codes in many parts of the country require the use of double-pane windows (sometimes, called "double-glazed" or "thermopane" windows). Ivpically, a double-pane window consists of two panes of glass separated by a space that contains trapped stagnant air. In one design of a double-pane window, each glass layer is 0.7 cm thick, the stagnant air layer is 2 cm thick, and the area is 4 m2 In the living room of a large...
4. Commercial building energy analysis. This problem analyzes how large commercial buildings use using data from the Photonics Center In particular, we want to compare the energy needed to condition the air flowing through the building, with the energy needed to 1) provide heat in the winter to balance the heat loss from the walls to the environment, and 2) provide the necessary cooling in the summer time to overcome the heat gain from the outside air (lets ignore solar...
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