The acronym in \"SEER in \"SEER Rating for air conditioners\" stands for _______

Question

The acronym in "SEER in "SEER Rating for air conditioners" stands for _____________ Higher the SEER rating, higher is the energy efficiency of the a/c unit. ____________ turbine is suitable for low-head, high-flow condition while ____________ turbine converts high head to high velocity using a nozzle, then strikes blades as they pass by, ___________ is an example of impulse turbine, while __________ is an example of axial-flow reaction turbine. Impulse/Reaction/Pelton wheel/Kaplan Reaction/lmpulse/Kaplan/Pelton wheel Impulse/Reaction/Francis/Kaplan Reaction/Impulse/Kaplan/Francis For a region receiving 800 w/m^3 of uninterrupted irradiation, 8 hours a day, a Pv panel at 20% efficiency generates _____________ kWh of daily electrical energy. In context of a solar power generation facility, the concept of Net Metering means Which of the following statements are generally true? In semiconductor production, doping intentionally introduces impurities into an extremely pure intrinsic semiconductor for the purpose of modulating its electrical properties, and makes it an extrinsic PV cells in series increase voltage output while those in parallel increase current output. A single photon can dislodge only a single valence electron in silicon semiconductor The difference between the band gap energy and the photon energy is absorbed as heat by the PV device. A, B & C. A, B, C and D. Wavelength of light greater than the one that can form an electron-hole pair in a semiconductor material has more than sufficient energy required to cause flow of current. TRUE/FALSE Which of the following statements are True? Cold air can't hold as much moisture as warm air. Psychrometric charts are printed mostly for sea level atmospheric pressure. Saturation line is a temperature condition at which water will begin to condense out of moist air Sensible heat is the heat content causing an increase in dry-bulb temperature. A, B & D A, B, C & D

Explanation / Answer

1. SEER - Seasonal Energy Efficiency ratio

2. (A) Impulse/reaction/Pelton wheel/Kaplan (Ans.)

3. Average Solar radiation = irradiation x number of hours of exposure = 800 x 8 = 6.4 kWh/m2
Since the area of PV pannel is not gien, hence assuming the area to be 1m2 and the efficiency given as 20% (or 0.2), the daily quantity of thermal energy obtained using collectors will be

ET = 6.4 x 1 x 0.2 = 1.28 kWh (Ans.) of daily electricity is generated

4. Net metering allows user/customer to generate a part of total power consumption or whole of the power consumption himself. Basically making him self sustained in terms of power needs. If the amount generated is more than the amount used, the customer can even sell it back to the higher authority.many solar power plants are equipped with net metering system when the freuency in the grid is below the rated parameter and and draw energy from the grid when the power is higher than the rated frequency. Recently Solar City, an enterprise of Mr. Elon Musk, has set up an excellent example for making the public self sufficient by using net metering in the state of Nevada without incurring any extra costs. Similarly the Tesla Giga factory will be self sufficient as the whole rooptop would be covered with solar pannels.

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