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Question (1): [10 marks] The lighting needs of a storage room are being met by 6...
The lighting needs of a classroom are met by 30 fluorescent lamps, each consuming 80 W...
The lighting needs of a classroom are met by 30 fluorescent lamps, each consuming 80 W of electricity (Fig. 2-52). The lights in the classroom are kept on for 12 hours a day and 250 days a year. For a unit electricity cost of 11 cents per kWh, determine annual energy cost of lighting for this class- room. Also, discuss the effect of lighting on the heating and air-conditioning requirements of the room.
The lighting requirements of an industrial facility are being met by 1000 40-W standard fluorescent bulbs....
The lighting requirements of an industrial facility are being
met by 1000 40-W standard fluorescent bulbs. The lamps are close to
completing their service life and the facility is examining
replacing them with 34-W high efficiency bulbs. A standard 40-W
bulb costs $1.77 each and a high efficiency 34-W bulb costs $2.26
each. The facility operates 8:00 AM to 8:00 PM every day of the
year, and the lamps are kept on during all operating hours. If the
cost of...
The "lumen method" is to be applied to design an overhead lighting system for a room,...
The "lumen method" is to be applied to design an overhead lighting system for a room, with basic illuminance equation: total = Ewp · Awp/(Cu · LLF) The room has floor area = 60 m². The target illuminance at the work-plane is 400 lux. It is intended the lighting power density for the room should be 7.5 W/m2 or less. The design will be fluorescent lamps with electronic ballasts that together achieve "system-efficacy" = 85 lm/W. A light-loss-factor Ly =...
Question 11 (1 point) An LED has reached the end of rated life when: Question 11...
Question 11 (1 point) An LED has reached the end of rated life when: Question 11 options: the filament opens. the fill gas is allowed to escape. emissive material on the cathode is insufficient to start or maintain the electrical discharge. lumen output drops 30 percent from initial rated value. the mercury beads have been vaporized. Question 12 (1 point) Based upon the operating conditions, it is determined that it is necessary to change a LED lamp 0.05 times over...
HVAC Economics 1. In five years, the value of an investment of $1000 increases to $1200....
HVAC Economics 1. In five years, the value of an investment of $1000 increases to $1200. What is the average annual interest rate over this period? 2. If the rate of general inflation is 3% and the nominal discount rate is 6%, what is the real discount rate? 3. According to 2017 US government projections, if the price of electricity for a commercial property in Oklahoma is $0.10/kWh in constant dollars in 2016, what will be its cost in constant...
1. Alaa works for a pharmaceutical company that has developed a new drug. The patent on...
1. Alaa works for a pharmaceutical company that has developed a new drug. The patent on the drug will last 17 years. She expects that the drug’s profits will be $2 million in its first year and that this amount will grow at a rate of 5% per year for the next 17 years. Once the patent expires, other pharmaceutical companies will be able to produce the same drug and competition will likely drive profits to zero. What is the...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
The lighting needs of a classroom are met by 30 fluorescent lamps, each consuming 80 W of electricity (Fig. 2-52). The lights in the classroom are kept on for 12 hours a day and 250 days a year. For a unit electricity cost of 11 cents per kWh, determine annual energy cost of lighting for this class- room. Also, discuss the effect of lighting on the heating and air-conditioning requirements of the room.
The lighting requirements of an industrial facility are being
met by 1000 40-W standard fluorescent bulbs. The lamps are close to
completing their service life and the facility is examining
replacing them with 34-W high efficiency bulbs. A standard 40-W
bulb costs $1.77 each and a high efficiency 34-W bulb costs $2.26
each. The facility operates 8:00 AM to 8:00 PM every day of the
year, and the lamps are kept on during all operating hours. If the
cost of...
The "lumen method" is to be applied to design an overhead lighting system for a room, with basic illuminance equation: total = Ewp · Awp/(Cu · LLF) The room has floor area = 60 m². The target illuminance at the work-plane is 400 lux. It is intended the lighting power density for the room should be 7.5 W/m2 or less. The design will be fluorescent lamps with electronic ballasts that together achieve "system-efficacy" = 85 lm/W. A light-loss-factor Ly =...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
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