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Environmental and economic assessment of the GasPlas reactor

Energy generation and carbon production with use of the GasPlas innovation

An economic simulation model in Excel has been developed with basis in the excel-model built by Jens Hetland at Sintef Energy Research. With the economic model the user can simulate 18 different scenarios, table Table 1-1, which vary with magnetron power system, CHP and external electricity demand to grid.

 

Table 1-1 The 18 scenarios analysed in the GasPlas study.

 

 

ICE

 

 

GT w/CC

 

FC (AC outlet)

600 kW

20 MW

5 MW

1 MW

20 MW

5 MW

1 MW

20 MW

5 MW

1 MW

1200 kW

20 MW

5 MW

1 MW

20 MW

5 MW

1 MW

20 MW

5 MW

1 MW

 

For these 18 scenarios, the life-cycle costs (LCC) and economic profitability, with respect to net present value (NPV) and internal rate of return (IRR), have been calculated. 

 

LCC is a measurement of which investment that has the lowest costs, while NPV and IRR are both related to profitability. The difference between NPV and IRR is that while NPV is an absolute measurement of the profitability, measured in GBP, IRR is a measure of relative profitability.  

 

With respect to the lowest LCC dependant on electricity demand to grid, the most desirable CHP technology is FC (AC outlet) for the highest electricity demand and ICE for the remaining. The results and most magnetron power-set up are listed below:

 

20 MW : 1200 kW, FC (AC outlet), LCC = 339 680 k£

5 MW   : 600 kW, ICE, LCC = 127 183 k£

1 MW   :  600 kW, ICE , LCC =  63 990 k£

 

Concerning the profitability, the 20 MW electricity demand to grid, 1200 kW magnetron set-up with ICE CHP technology is the most desirable. This case has an NPV of 182 898 k£ and an IRR on 51 %. Do keep in mind that this is also a system with a high LCC.  This is a cause of concern if the investors are risk-averse, then the investor might want to consider to which degree the costs and income are known. With the current available data the GasPlas system is profitable if it is set-up with an 20 MW el demand to grid with all CHP technologies independent on magnetron power-set up. For 5 MW el demand to grid only the ICE CHP plant technology is profitable. For all other set-ups it’s non-profitable. Note that if you include green-tech grants this may change, as elaborated in connection to sensitivity analyses in chapter 5.    

 

Results for a 600 kW magnetron and a 1200 kW magnetron set-up with 20 MW electricity demand to grid (160 GWh electricity/year) are summarised in table 1-2. 

             

© Ostfold Research        Table 1-2 Summarised results for 20 MW electricity demand to grid for the different magnetron and CHP setups.

 

 

Case 0 - Base case - 600 kW magnetron

 

 

XXL - 1200 kW magnetron

 

 

ICE

 

GT w/CC

 

FC (AC outlet)

 

ICE

 

GT w/CC

 

FC (AC outlet)

All monetary units given in 1000 £

 

CAPEX

62 782,-

72 812,-

83 654,-

63 070,-

73 100,-

77 877,-

OPEX

31 071,-

28 847,-

31 249,-

31 797,-

29 613,-

32 195,-

Operating profit

20 245,-

13 625,-

6 947,-

21 215,-

14 450,-

8 858,-

LCC

364 465,-

386 123,-

340 269,-

372 475,-

394 134,-

339 680,-

NPV

171 937,-

85 152,- 

-3 109,-

182 898,- 

94 435,-

24 821,-

IRR

 47,6 %

22,6 %

0 %

50,7 %

24,3 %

11,3 %

 

 

Greenhouse gas emissions 

[kg            CO2-eq/

kWh]

0.38

0.40

0.36

0.36

0.37

0.34

Energy         use

[kWh]

6.03

6.23

5.92

5.41

5.55

5.36

 

The values of GHG-emissions and energy use tell something about the environmental performance of the GasPlas reactor system setup, but more information is added when the electricity produced from the GasPlas reactor setup is compared to other means of providing electricity. Beware that the numbers given in table 1-2 are based on an analysis performed with energy allocation, and allocation based on economic value changes the results dramatically.

 

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