1.0.2 This code is applicable to the design of such constructed, extended and renovated fossil fired power plants with parameters at or below high pressure and high temperature, power per unit less than 125MW, adopting the direct combustion mode and mainly combusting solid fossil fuel.
1.0.3 In addition to the requirements stipulated in this code, the design of small fossil fired power plant also shall comply with those in the current relevant ones of the nation.
2 Terms
2.0.1 Thermalization coefficient
The ratio of the rated heating load (deducting the self-use steam heat load) of heat supply unit to the maximum design heating load.
2.0.2 Simultaneity factor
The ratio of the regional (enterprise) maximum heating load to the sum of maximum heating load of all users (workshops).
2.0.3 Micro filtration
A kind of membrane separation technique, with filtration precision of 0.1 μm~1.0 μm.
2.0.4 Ultra filtration
A kind of membrane separation technique, with filtration precision of 0.01 μm~0.1 μm.
2.0.5 On line UPS
An uninterruptible power supply unit having such function that whether the AC working power supply is normal or not, the inverter is always in working state and is able to guarantee the uninterruptible power supply for loads through the inversion of DC power supply and output AC sine wave.
2.0.6 Electrical control and management system
A computer system performing control and management over such electrical equipment as generator transformer bank and high and low voltage auxiliary power supply of power plant by adopting open or distributed network structure on basis of the fieldbus technology, which is also referred to as ECMS.
2.0.7 Network computerized control system
A computer system performing control and management over the power network system or equipment of booster station by adopting open or distributed network structure on basis of the fieldbus technology, which is also referred to as NCCS.
2.0.8 Operator station
A man-machine interface equipment installed at the control room in control system and used for operator to conduct monitoring and controlling.
2.0.9 Parallel change-over
The change-over with the commands on the tripping of high-voltage working power supply circuit breaker and the switching in of standby power supply circuit breaker of the power plant being given simultaneously.
2.0.10 High speed change-over
The auxiliary power change-over for power plant with change-over time no larger than 100 ms when high voltage auxiliary power is in accident.
2.0.11 Engineer station
A man-machine interface equipment installed at the control room or other places in the control system and used for programming and configuration personnel to conduct logic, picture and parameter modification.
2.0.12 Air cooled heat exchangers
A kind of heat dissipation equipment cooling down the circulating water of indirect air cooling system by using air as cooling medium.
2.0.13 Air cooled condensers
A kind of heat dissipation equipment making the steam exhausted from steam turbine condense to water by using air as cooling medium.
2.0.14 Drought exponent
The ratio of the annual evaporation capacity and annual rainfall at a region.
2.0.15 Severe cold region
The region where the mean temperature of normal coldest month (i.e. the winter ventilation outdoor calculated temperature) is not higher than -10℃.
2.0.16 Cold region
The region where the mean temperature of normal coldest month (i.e. the winter ventilation outdoor calculated temperature) is not higher than 0℃ but higher than -10℃.