Project description: | Balancing of the refrigeration unit of the direct-fired power plant to identify an efficient mode of operation with the aim to optimise operation of the refrigeration unit
Realisation in two project stages:
- Balancing and appropriate standardised representation (already realised)
- Online calculation of the optimal mode of operation and subsequent operator guidance
Consideration had to be given to the following: - 2 suction line pressures (LP 0.5 bar/-21°C, HP 2.5 bar/-5°C)
- 3 NH³ condensers (LP) : 0.5 bar to 2.5 bar
- 5 NH³ condensers (HP)
- 11 injection coolers upstream of the condensers
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Technical highlights: | Drafting specification with the plant - Setting up an interface for energy consumption (condenser, cooling water pumps, ventilators / 6kV, 500V, 230V)
- Realisation with Wonderware InTouch and Siemens S7-400 PLCs
- Recording the mode of operation in an InSQL database
- Calculating specific consumption and specific costs per machine and plant section (-21°C refrigeration/-5°C refrigeration)
- Calculation of efficiency rating and COP per machine for LP/HP, -21°C/- 5°C, as well as for the entire plant
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