Page 473 - Mechanical Engineers' Handbook (Volume 4)

462 Refrigeration

Table 7 Information Needed for the Design of a Refrigeration System
Process flow sheets and thermal specifications
Type of process
Batch
Continuous
Normal heat balances
Normal material balances
Normal material composition
Design operating pressure and temperatures
Design refrigeration loads
Energy recovery possibilities
Manner of supplying refrigeration (primary or secondary)
Basic specifications
Mechanical system details
Construction standards
Industry
Company
Local plant
Insulation requirements
Special corrosion prevention requirements
Special sealing requirements
Process streams to the environment
Process stream to refrigerant
Operating environment
Indoor or outdoor location
Extremes
Special requirements
Special safety considerations
Known hazards of process
Toxicity and flammability constraints
Maintenance limitations
Reliability requirements
Effect of loss of cooling on process safety
Maintenance intervals and types that may be performed
Redundancy requirement
Acceptance test requirements
Instrumentation and control requirements
Safety interlocks
Process interlocks
Special control requirements
At equipment
Central control room
Special or plant standard instruments
Degree of automation: interface requirements
Industry and company control standards
Off-design operation
Process startup sequence
Degree of automation
Refrigeration loads vs. time
Time needed to bring process on-stream
Frequency of startup
Process pressure, temperature, and composition changes during startup
Special safety requirements
Minimum load
Need for standby capability