a) Exchange old or worn components to prevent overuse and breakdown
b) System upgrades

• Manufacturer of main (secondary) engine
• The type (or number) of main (secondary) engine
• Max output power
• Rated fuel consumption
• Max total fuel consumption(100% load)
• The type of fuel
• Heavy-oil jet viscosity
• Minimum input viscosity of light diesel oil
• Max outlet temperature
• Precision
• Heating medium
• Temperature of heavy-oil service tank
• Temperature of low sulfur oil service tank
• Max operating/testing pressure
• Voltage
• Electricity
• Classification society
• (Others)

• Manufacturer of main (secondary) separator
• The type (or number) of main (secondary) separator
• Max output power
• Max fuel oil consumption (100% load)
• Max lubricating oil consumption (100% load)
• The type of fuel oil
• The type of lubricating oil
• Temperature of fuel oil sump tank
• Temperature of lubricating oil service tank
• Heating medium
• Voltage
• Electricity
• Classification society
• (Others)

• Type of refrigerant: R404a
• Inlet pressure: ≤1.0Mpa
• Inlet temperature: ≤55℃
• Throughput of compressed air
• Pressure dew point: 2-10℃
• Voltage
• Electricity
• Unit of measurement: ISO standard
• The color of oil paint
• Number
• Classification society
• (Others)

• Type of low sulfur oil
• Temperature of low sulfur oil service tank
• Max flow of low sulfur oil
• Outlet temperature of low sulfur oil
• Max outlet viscosity of low sulfur oil
• Water chilling unit
• The type and temperature of cooling water at the condenser
• Condensing temperature
• Cooling water consumption of the condenser
• Temperature of evaporator's cooling water
• Cooling temperature of low sulfur oil
• Refrigerant of low sulfur cooler
• Max operating/testing pressure of low sulfur oil
• Voltage
• Electricity
• Classification society
• (Others)

Based on the original system, new requirements and improvements are outlined.