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ករផលតរម (Co-generation) 55
ទនននយរបតបតត ៃនករផលតរម (Co-generation)
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២.១ បេចចកវទយ អ តេដើរេ យធយងថម (Clean coal technology) 56
បេចចកវទយ អ តេដើរេ យធយងថម គជកររបមលផតៃនបេចចកវទយែដលបនអភវឌេដើមបកតបនថយករបះពលដលបរ ថ នេនកនងករផលតថមពលេចញពធយងថម។ ឧសមនបពលេផ ងៗែដលបេញចញពករដតធយងថមមនដចជ SOx, NOx, CO2 នង PMs រតវបនកតបនថយរដកេចញ មរយៈរបពនធបេចចកវទយ អ តេដើរេ យធយងថម។ បេចចកេទសខលះៗែដលរតវបនេរបើរបសេដើមបសេរចេគលេ មនដចជ ករេរបើរបសែរដចជថមកេបរេដើមប ងយកធតពល នងករេរបើរបសរបពនធបណតឧសមន (gasification) ករច ញឧសមនបេញចញេចលេ យច យទកេដើមបដកយកឧសមន Sox ករចបយកឧសមនកបនច នងរក ទក (carbon capture and storage) បេចចកវទយ អ តេដើរេ យធយងថមទងេនះមនៈ - ករបេងកើត នងករកតបនថយឧសមន NOx - ករកតបនថយឧសមន SO2 - ករចបយកឧសមនកបនច នងរក ទក
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២.១ បេចចកវទយ អ តេដើរេ យធយងថម (Clean coal technology) 57
• ករបេងកើត នងករកតបនថយឧសមន NOx (NOx generation and reduction)
• ករកតបនថយឧសមន SO2 (SO2 reduction)
• ករចបយកឧសមនកបនច នងរក ទក (Carbon capture and storage)
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ករបពលរបសឧសមន NOx នង SOx 58
ឧសមនNox នង Sox ែដលបនរពែលងេចញេទកនងបរយកសបេងកើតបនជេភល ង សត ែដលេភល ងេនះបផល ញបរ ថ ន នងរបពនធេអកឡស។
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ករតបពលរបសឧសមន NOx នង SOx នេពលបចចបបនន 59
x
2.5
Boiler
Coal Flue gas
De-NOx
Electrostatic precipitator
FGD
Stack
NO (mg/Nm3)
3
<500 - 1 000
<50 - 100
Current performance at stack <50 - 100 (<0.16 - 0.42 g/kWh) <20 - 100
SO2 (mg/Nm )
PM (mg/Nm3)
<1 000 - 5 000
<20 000
< 20 - 100 < 50 < 10
(<0.06 - 0.42 g/kWh ) <10 (<0.032 - 0.042 g/kWh)
ថ នភពបចចបបនន ចេពះករកតបនថយឧសមនពលេ យរបពនធបណត
Roadmap technology publication of IEA
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បរមណ សត (N2) េនកនងធយងថម 60
េឈម ះ សមពនធ បរមណ េសថរភព
Pyridine1 15-40%
More stable
Pyrrole1 60% Less stable
Aromatic amines
6-10% Stable
1 រមបញច លមន សពនធែដលបេងកើតេឡើងរបសពពក រ មព ២-៥កងសមពន តម
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យនតករបេងកើត NOx 61
‐ បេងកើតេ យកេ (Thermal NO)
- បេងកើតេ យបែបក (Prompt NO)
- បេងកើតេ យេរបង (Fuel NO: volatiles‐NO and
char‐NO)
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យនតករបេងកើត NOx 62
‐ ករបេងកើតេ យកេ (យនតករ Zeldovich)
N2 + O NO + N
N + O2 NO + O
រសយេលើសតណហ ភពខពស: >1300-1500°C
មនែមនជរបភពធកនងករបេងកើត NO
‐ ករបេងកើតេ យបែបក (Prompt NO)
N2 + CHx HCN + N + …
N + OH NO + H
េកើតមនែតេនេពលមនរបយេរបងេរចើន មនែមនជរបភពធកនងករបេងកើត NO
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យនតករបេងកើត NOx 63
‐ េរបង NO (‐N ែដលមនកនងជតេហើរភយ)
េរបង -N HCN/NH3
គជរបភពធកនងករបេងកើត NO (>80%).
‐ ធយង NO (‐N ែដលមនកនងកកធយង)
ជតេហើរភយ (ករបេងកើត )
(ករបផល ញ) HCN/NH3 + O2
N2
NO NO + HCN/NH3
កកធយង -N + ½O2 NO
កកធយង -C + NO ½N2 + កកធយង (O)
(ករបេងកើត )
(ករបផល ញ)
[កកធយង -NO = ~25%] < [ជតេហើរភយ-NO = ~75%]
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យនតករប នថយ NOx 64
- មរយៈកររគបរគងចេហះ ករែកែរបរេបៀបដតបេញឆ ះ
• ករដតេឡើងវញ • ករដតបេញឆ ះេរចើនដ ក
‐ កររគបរគងបនទ បពចេហះ មរយៈករបញបញច លនវ រធតកតបនថយេនកនងខយល
បេញចញ (flue gas) កររគបរគងបនទ បពចេហះ មរយៈដេណើ រករដក សត
េចញ (denitrification processes)
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២.១ បេចចកវទយ អ តេដើរេ យធយងថម (Clean coal technology) 65
• ករបេងកើត នងករកតបនថយឧសមន NOx (NOx generation and reduction)
• ករកតបនថយឧសមន SO2 (SO2 reduction)
• ករចបយកឧសមនកបនច នងរក ទក (Carbon capture and storage)
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ករកតបនថយឧសមន SO2 66
ករកតបនថយឧសមន SO2 មរយៈករបញធតរសប (ករបញថមកេបរ)
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ករកតបនថយឧសមន SO2 67
SOx reduction by sorbent injection
ករកតបនថយឧសមន SO2 មរយៈករបញធតរសប (ករបញថមកេបរ)
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ករកតបនថយឧសមន SO2 68
ករកតបនថយឧសមន SO2 មរយៈករបញធតរសប (ករបញថមកេបរ)
ធតរសបសងតែដលបញបញច ល ធតកខវក ករតកតបនថយ
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NOx and SOx Reduction 69
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ករកតបនថយឧសមន NOx នង SOx 70
0
1
2
3
4
SOx NOx SOx NOx
France in 2005 Japan in 2010
(g/k
Wh)
របភព របេទសប ងៈOECD Environmental Data Compendium 2006/2007 របេទសជបនៈ Federation of Electric Power Companies of Japan
របេទសប ងឆន ២០០៥ របេទសជបនឆន ២០១០
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២.១ បេចចកវទយ អ តេដើរេ យធយងថម (Clean coal technology) 71
• ករបេងកើត នងករកតបនថយឧសមន NOx (NOx generation and reduction)
• ករកតបនថយឧសមន SO2 (SO2 reduction)
• ករចបយកឧសមនកបនច នងរក ទក (Carbon capture and storage)
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ឧសមនកបនច 72
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ឧសមនកបនច 73
ឧសមនកបនចបេញចញ មរយៈែផនកែដលផលត
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ឧសមនកបនច 74
បេចចកវទយេដើមបកតបនថយឧសមនកបនច
បេចចកវទយជេរចើននងរតវករ ស បករកតបនថយឧសមនកបនច
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ករបញបញច លឧសមនកបនច (Carbon sequestration) 75
• េដើមបកតបនថយធតពលពេរបងផសលេទកនងបរយកស
• ចេរបើរបសជមយរបភពថមពលធៗដចជ េ ងចរកអគគសនេដើរេ យធយងថម
• ឧសមនកបនចរតវបនចប នងរក ទកេរកមដែដលមន
ចេ យ ភយេទកនងបរយកស
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ករចបយកឧសមនកបនច នងរក ទក (Carbon capture and storage) 76
េរបង
ដេណើ រករ
ជេរ ើសៃនកររក ទក
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ករចបយកឧសមនកបនច នងរក ទក (Carbon capture and storage) 77
1996 1999 2001
ករ ស ពនតយ ម ន នងបញជ កពកររក ទកឧសមនកបនច
ឧទហរណៃនករ ម នឧសមនកបនច កនងរសទបែផនដេនតបន Sleipner
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កររក ទកឧសមនកបនច េរកមបតសមរទ 78
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២.២ បេចចកវទយេ ងរចអគគសនេដើរេ យថមពលនយេកលែអ 79
• ថ នភពបចចបបននៃនថមពលនយេកលែអរ
• ដេណើ រករ នងគណសមបតតៃនេ ងចរកថមពលេដើរេ យនយេកលែអរ
•ករតវទយសកមម នងរងវ ស
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ថ នភពបចចបបននៃនថមពលនយេកលែអរ 80
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ថ នភពបចចបបននៃនថមពលនយេកលែអរ 81
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ថ នភពបចចបបននៃនថមពលនយេកលែអរេន ស 82
គេ ងថមពល
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២.២ បេចចកវទយេ ងរចអគគសនេដើរេ យថមពលនយេកលែអ 83
• ថ នភពបចចបបននៃនថមពលនយេកលែអរ
• ដេណើ រករ នងគណសមបតតៃនេ ងចរកថមពលេដើរេ យនយេកលែអរ
•ករតវទយសកមម នងរងវ ស
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ដេណើ រករ នងគណសមបតតៃនេ ងចរកថមពលេដើរេ យនយេកលែអរ 84
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ដេណើ រករ នងគណសមបតតៃនេ ងចរកថមពលេដើរេ យនយេកលែអរ 85
• ករបែបកគជបេចចកវទយថមពលបចចបបននែដលេរបើរបសេរបងតចបផត
• ធតអយ ញម ចរកបនងយកនងសបកែផនដ
• សន សៃចកនងកររបតបតតដចធយងថមែដរ តៃលេរបងតចតចបផត
• ចេរបើរបសបន -ថមពលនយេកលែអរមនសមថភព នភពធ មនមនចេហះ នងមនបេញចញឧសមនេផ ងៗដចជ CO, CO2 , SO2 • បេងកើតករងរែដលមនរបកែខខពស នងមនកនតរ សវតថភពខពស
• កតបនថយករពងពកេលើេរបងបរេទស បេងកើនសនតសខថមពលជត េ ងចរកនយេកលែអរមយ ចេរបើរបសបនកនងរយៈេពល៦ែខ ជមយនងករ កេរបងមតង • មសនរបតកមមេធវើករេនកនងសតណហ ភពខពស ដេចនះ ចផលតបនទងអគគ
សន នងអរដែសន
• មយេរគ ងៃនេ ងចរកនយេកលែអរ (1GW) ចផគតផគងស បរបេទសកមពជបន
ទងមលស បេពលបចចបបនន។
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ករផលតកេ មរយៈរបតកមមនយេកលែអរបែបក 86
U‐235 + 1 Neutron 2 Neutrons + Kr‐92 + Ba‐142 + Energy
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ករផលតកេ មរយៈរបតកមមនយេកលែអរ យបញច ល 87
•ឧទហរណមយៃនរបតកមមរ យបញច លរបសេរបង deuterium (គជអសតបអរដែសនករតធងន) នង tritiumែដលបេងកើតជេអលយម នងបេញចញថមពលកេ
p + p He + n + 0.42 MeV
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េរគ ងបងគ ទេទរបសេ ងចរកអគគសនេដើរេ យថមពលនយេកលែអរ 88
Boiling Water Reactor (BWR)
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កររគបរគងករតរបតកមមនយេកលែអរ 89
របតកមមបែបករតវបនរគបរគងេ យរបរបញជ រ
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របេភទមសនរបតកមមនយេកលែអរ 90
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វដតេរបងនយេកលែអរ 91
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ករតជ បវទយសកមមេទេលើរបធតមយចនន 92
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កររគបរគងកកសណលនយេកលែអរ 93
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ករទក កកកសណលកនងរសទបេរជរបសែផនដ 94
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២.២ បេចចកវទយេ ងរចអគគសនេដើរេ យថមពលនយេកលែអ 95
• ថ នភពបចចបបននៃនថមពលនយេកលែអរ
• ដេណើ រករ នងគណសមបតតៃនេ ងចរកថមពលេដើរេ យនយេកលែអរ
• ករតវទយសកមម នងរងវ ស
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ខន តវទយសកមម 96
សកមមភពបែបកភគលអតៃនវទយសកមម • Becquerel‐ SI unit (Bq) = 1 disintegration per second (dps) • Curie (Ci) = 3.7 x 1010 Bq = # dps from 1g Ra
ករតរសបគជថមពលែដលបេញចញេ យធតវទយសកមមេទេលើរបធតែដលរសបយក Gray‐SI(Gy) = 1 joule per kilogram
• 1 Gy = 100 rads
ករតសមមល គជករតែដលមនឥទធពលេលើរបពនធជវៈចរះ DE = Absorbed dose X Quality factor (Q)
• Q = 1 for beta particles and gamma/x‐rays Q = 10 for alpha particles • Sievert‐ SI unit (Sv) 1 Sv = 100 rems
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ករតវទយសកមមែដលបេញចញេ យឧបករណេផ ងៗ 97
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សមអរគណចេពះករយកចតតទក ក
98