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Renewable energy > Mid term lesson > Flashcards

Mid term lesson Flashcards

1
Q

a technology that directly converts radiant light to electricity

A

photovoltaic

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2
Q

part of solar PV system stores extracted electricity

A

battery

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3
Q

part of solar PV that protects battery from over charge and over discharge

A

Charge Controller

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4
Q

part of solar PV system that converts DC to AC

A

inverter

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5
Q

the wind energy system instrument that measures wind speed

A

anemometer

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6
Q

component of wind energy system converts the mechanical energy into electrical energy

A

generator

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7
Q

wind energy system instrument that shows the wind direction

A

wind vane

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8
Q

air density

A

1.225 kg/m^3

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9
Q

refers to any organic material that is available on a renewable or recurring basis

A

Biomass

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10
Q

this thermochemical process involves direct burning of organic materials to produce either process heat or power

A

Direct combustion

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11
Q

this thermochemical process converts carbonaceous materials such as coal, petroleum, biofuel or biomass, into carbon monoxide and hydrogen by reacting the raw materials at high temperatures with controlled amount oxygen and steam

A

Gasification

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12
Q

type pf bacteria that acts upon biodegradable materials in an anaerobic condition that produces methane

A

methanogenic bacteria

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13
Q

the flammable gas produced during bacterial decomposition of organic matter which comprises of 50-60% methane

A

biogas

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14
Q

the entrance of diverted water from the main river system in a micro hydropower

A

intake

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15
Q

the term for the storage tank of diverted water in a micro hydropower system

A

headtank/forebay

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16
Q

the pipe in a micro hydropower system that directs the stored water to the powerhouse

A

penstock

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17
Q

a type of solar PV system that can generate the daily energy demand and run the appliances by itself without support from other energy source

A

standalone PV system

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18
Q

1st step in solar PV design

A

load estimation

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19
Q

load recommended for a system voltage of 12V DC

A

load > 1500 W

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20
Q

load recommended for a system voltage of 24V DC

A

1500W < load > 5000W

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21
Q

load recommended for a system voltage of 48V DC

A

load > 5000W

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22
Q

peak solar intensity at the earth surface

A

1kw/m^2

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23
Q

minimum average solar intensity in Benguet

A

4.5 hrs

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24
Q

this is a measure of how much of the total battery capacity has been consumed

A

maximum depth of discharge

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25
Q

number of days the battery bank can support the daily energy demand without being charged

A

number of days autonomy

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26
Q

how many percent is the voltage drop should not to exceed in AC and DC wiring for standalone photovoltaic system

A

4%

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27
Q

an energy obtained from continuing and repetitive currents of energy recurring in a natural environment

A

renewable energy

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28
Q

its supply is renewed regularly and it can supply energy requirement continuously

A

renewable energy

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29
Q

any device for the conversion of renewable energy resources, either for transforming into more useful form of energy or for energy utilization

A

renewable energy system

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30
Q

features of renewable sources and system

A

renewable
indigenous
environmental friendly
decentralized
modular

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31
Q

renewable energy system

A

solar energy
wind energy
hydro energy
geothermal energy
biomass energy
ocean energy

32
Q

refers to energy from falling or running water which can be converted into rotary motion and in turn produces mechanical or electrical energy

A

hydro energy

33
Q

types of development or hydropower facilities

A
  1. impounding/reservoir/pondage ( large hydro)
  2. run-of-river type (mini and micro hydro)
  3. pumped-storage type (large hydro)
34
Q

refers to solar radiation in which can be converted either into thermal or electrical energy

A

solar energy

35
Q

application of solar energy

A
  1. drying of crops
  2. heating of solar water heater
  3. cooking
  4. electricity production
36
Q

photo means

A

light

37
Q

voltaic means

A

electricity

38
Q

part of solar PV system that has long life of 20 years

A

PV module

39
Q

part of solar PV system converts solar energy into electricity

A

PV module

40
Q

part of solar PV system that the generation is during day time only

A

PV module

41
Q

conversion of wind energy into useful form of energy

A

wind power

42
Q

wind energy can be converted into useful form of energy such as:

A
  1. propel ships
  2. pumping water
  3. grinding grain
  4. generating electricity
43
Q

Advantages of wind power

A
  1. plentiful
  2. renewable
  3. widely distributed
  4. clean
  5. no greenhouse gas emissions during operation
44
Q

power generation using wind is similar to _________. The wind’s ______ drives the _____ of _______

A

hydroelectricity power generation
kinetic energy
turbine
generator

45
Q

streamlined casing that encloses the working components such as gear box and the electrical generator

A

nacelle

46
Q

it connects the low speed shaft to a high speed shaft that in turn connects to the generator

A

gears

47
Q

it increases the rotation energy speeds about 50 times to around 1200 to 1500 rpm

A

gears

48
Q

an electronic device that constantly monitors the wind speed and direction

A

controller

49
Q

it switches the turbine on when it reaches the minimum speed and off when the wind reaches a set maximum speed or when the generator overheats

A

controller

50
Q

it adjust the yaw mechanism that moves the turbine to keep the rotors facing into the wind

A

controller

51
Q

shaped like aero plane wings to catch the wind transfer energy to the rotor hub.

A

rotor blades

52
Q

Geothermal energy comes from the greek word Geo and therme meaning

A

geo - earth
therme - heat

53
Q

uses geothermal heat to generate electricity

A

geothermal energy

54
Q

refers to all organic materials such as wood, agricultural residues, animal waste and others

A

biomass

55
Q

refers to organic materials that has stored energy through the process photosynthesis

A

biomass

56
Q

refers to energy produced through either thermochemical or biochemical process of organic materials primarily plant matters

A

biomass

57
Q

sources of biomass available for energy

A
  1. livestock manure
  2. crop residues
  3. fuel wood
  4. sugar crops
  5. rural and municipal wastes
  6. aquatic plants
58
Q

involves direct burning of organic materials to produce either process heat or power

A

direct combustion systems

59
Q

synthesis gas is also known as

A

syngas

60
Q

it is also called producer gas

A

synthesis gas or syngas

61
Q

the resulting gas mixture

A

synthesis gas or syngas

62
Q

a chemical decomposition or the absence of air of condensed substances at high enough temperatures

A

Pyrolysis

63
Q

use of heat to break down complex chemical substances into simpler substances

A

pyrolysis

64
Q
A
65
Q

refers to liquid fuel produced from biomass resources and have to potential to complement or replace fossil based fuel such as gasoline and diesel oils

A

Bio fuels

66
Q

local material for ethanol production

A

molasses

67
Q

ethanol and gasoline blend

A

alcogas

68
Q

70 to 80% coconut oil blend with diesel oil

A

coco diesel

69
Q

product of esterification process using coconut oil and methanol

A

methyl ester

70
Q

reaction between an acid and an alcohol with the elimination of water

A

ester

71
Q

common design of wind turbine where in the shaft is horizontally positioned which include propeller type, 3 blade, multi blade and dutch type

A

horizontal shaft wind mill

72
Q

common design of wind turbine where in the shaft is horizontally positioned which include propeller type, 3 blade, multi blade and dutch type

A

horizontal shaft wind mill

73
Q

common design of wind turbine that are characterized by an axis of rotation that is perpendicular to the ground (vertical shaft) which include giromill, savonius, and darrieus type

A

vertical shaft windmill

74
Q

maximum theoretical power coefficient (betz number)

A

0.593

75
Q

velocity of the tip of the rotor to travel the circumferential distance

A

tip speed

76
Q

ratio of the tip speed of the rotor to the wind speed

A

tip speed ratio

Renewable energy (1 decks)

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