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Evidence Guide: PMAOPS241 - Operate Joule-Thomson effect device

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

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PMAOPS241 - Operate Joule-Thomson effect device

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare for work

  1. Receive and give shift handover
  2. Identify work requirements
  3. Identify and control hazards
  4. Coordinate with appropriate personnel
  5. Check for recent work undertaken on Joule-Thomson system
  6. Note any outstanding/incomplete work
  7. Check operational status of Joule-Thomson system
Receive and give shift handover

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify work requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and control hazards

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Coordinate with appropriate personnel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check for recent work undertaken on Joule-Thomson system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Note any outstanding/incomplete work

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check operational status of Joule-Thomson system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Monitor and operate Joule-Thomson device

  1. Monitor Joule-Thomson system frequently and critically throughout shift using measured/indicated data and senses as appropriate
  2. Identify impacts of any changes upstream and downstream
  3. Recognise situations which may require action
  4. Resolve routine problems
  5. Take actions on other abnormal situations to make safe and have the situation resolved
Monitor Joule-Thomson system frequently and critically throughout shift using measured/indicated data and senses as appropriate

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify impacts of any changes upstream and downstream

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Recognise situations which may require action

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Resolve routine problems

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Take actions on other abnormal situations to make safe and have the situation resolved

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Isolate and de-isolate Joule-Thomson system

  1. Complete any required pre-start checks
  2. Start up/shut down/changeover Joule-Thomson device according to the Joule-Thomson device type and duty in liaison with other personnel
  3. Isolate Joule-Thomson system
  4. Make safe for required work
  5. Check Joule-Thomson system is ready to be returned to service
  6. De-isolate and prepare Joule-Thomson system for return to service
Complete any required pre-start checks

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Start up/shut down/changeover Joule-Thomson device according to the Joule-Thomson device type and duty in liaison with other personnel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Isolate Joule-Thomson system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Make safe for required work

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check Joule-Thomson system is ready to be returned to service

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

De-isolate and prepare Joule-Thomson system for return to service

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for work

1.1

Receive and give shift handover

1.2

Identify work requirements

1.3

Identify and control hazards

1.4

Coordinate with appropriate personnel

1.5

Check for recent work undertaken on Joule-Thomson system

1.6

Note any outstanding/incomplete work

1.7

Check operational status of Joule-Thomson system

2

Monitor and operate Joule-Thomson device

2.1

Monitor Joule-Thomson system frequently and critically throughout shift using measured/indicated data and senses as appropriate

2.2

Identify impacts of any changes upstream and downstream

2.3

Recognise situations which may require action

2.4

Resolve routine problems

2.5

Take actions on other abnormal situations to make safe and have the situation resolved

3

Isolate and de-isolate Joule-Thomson system

3.1

Complete any required pre-start checks

3.2

Start up/shut down/changeover Joule-Thomson device according to the Joule-Thomson device type and duty in liaison with other personnel

3.3

Isolate Joule-Thomson system

3.4

Make safe for required work

3.5

Check Joule-Thomson system is ready to be returned to service

3.6

De-isolate and prepare Joule-Thomson system for return to service

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for work

1.1

Receive and give shift handover

1.2

Identify work requirements

1.3

Identify and control hazards

1.4

Coordinate with appropriate personnel

1.5

Check for recent work undertaken on Joule-Thomson system

1.6

Note any outstanding/incomplete work

1.7

Check operational status of Joule-Thomson system

2

Monitor and operate Joule-Thomson device

2.1

Monitor Joule-Thomson system frequently and critically throughout shift using measured/indicated data and senses as appropriate

2.2

Identify impacts of any changes upstream and downstream

2.3

Recognise situations which may require action

2.4

Resolve routine problems

2.5

Take actions on other abnormal situations to make safe and have the situation resolved

3

Isolate and de-isolate Joule-Thomson system

3.1

Complete any required pre-start checks

3.2

Start up/shut down/changeover Joule-Thomson device according to the Joule-Thomson device type and duty in liaison with other personnel

3.3

Isolate Joule-Thomson system

3.4

Make safe for required work

3.5

Check Joule-Thomson system is ready to be returned to service

3.6

De-isolate and prepare Joule-Thomson system for return to service

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria, and include the ability to:

start up/shut down the Joule-Thomson system

monitor the system

recognise early warning signs of equipment/processes needing attention or with potential problems

determine the most likely cause of routine problems

take appropriate action to ensure a timely return to full performance

isolate and de-isolate equipment

identify hazards and apply hazard control procedures.

Evidence must be provided that demonstrates knowledge of:

cryogenic hazards associated with the process and the materials, including metal embrittlement

cryogenic materials, their lines and vessels

Joule-Thomson principles

physics relevant to Joule-Thomson system, including Boyles and Charles laws, adiabatic/constant enthalpy expansion, inversion temperature and product dew point (i.e. dew point of the hydrocarbon, air or other gas being condensed)

importance of the temperature range, (lack of) moisture (and other contaminants) in the process stream, and other critical variables

hierarchy of control

hazards that may arise in the job/work environment, and:

their possible causes

potential consequences

appropriate risk controls.

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Regulatory framework

The latest version of all legislation, regulations, industry codes of practice and Australian/international standards, or the version specified by the local regulatory authority, must be used, and include one or more of the following:

legislative requirements, including work health and safety (WHS)

industry codes of practice and guidelines

environmental regulations and guidelines

Australian and other standards

licence and certification requirements

All operations to which this unit applies are subject to stringent health, safety and environment (HSE) requirements, which may be imposed through state/territory or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and HSE requirements, the HSE requirements take precedence.

Procedures

All operations must be performed in accordance with relevant procedures.

Procedures are written, verbal, visual, computer-based or in some other form, and include one or more of the following:

emergency procedures

work instructions

standard operating procedures (SOPs)

safe work method statements (SWMS)

formulas/recipes

batch sheets

temporary instructions

any similar instructions provided for the smooth running of the plant

Hazards

Hazards include one or more of the following:

process hazards

cryogenic materials and hazards

cold embrittlement

electricity

gas

gases and liquids under pressure

structural hazards

structural collapse

equipment failures

industrial (machinery, equipment and product)

equipment or product mass

noise, rotational equipment or vibration

limited head spaces or overhangs

working at heights, in restricted or confined spaces, or in environments subjected to heat, noise, dusts or vapours

flammability and explosivity

hazardous products and materials

unauthorised personnel

sharp edges, protrusions or obstructions

slippery surfaces, spills or leaks

extreme weather

other hazards that might arise

Routine problems

Routine problems must be resolved by applying known solutions.

Routine problems are predictable and include one or more of the following:

pressure differential (DP) out of range

feed/product too warm

feed/product pressure out of range

liquid forming in wrong part of system

lubrication system too hot/cold wrong pressure

leaking seals/seal gas flow/pressure wrong

high thrust forces

excessive vibration

Known solutions are drawn from one or more of the following:

procedures

training

remembered experience

Non-routine problems must be reported according to according to relevant procedures.

Joule-Thomson device

A Joule-Thomson device is any device which requires a gas/vapour to do work, typically by expanding so cooling the vapour (i.e. uses the Joule-Thomson effect). While the vapour will not usually condense in the Joule-Thomson device it will often condense immediately on leaving the device. Some devices may be constructed to allow for condensation to occur within the device, this is sometimes also called the Joule-Kelvin effect.

Monitor

Product produced will be monitored for the following:

value of critical variables

state (liquid/vapour)

production rate (e.g. volume or mass flow rate)

other properties as defined in job specifications/procedures

Critical variables to be monitored include one or more of the following:

temperature

pressure

pressure drops

purity/contaminants

inlet guide vane (IGV) blade angles (where appropriate to the device)

speed of rotation (where appropriate to the device)

other variables (where appropriate to the device)

Joule-Thomson system

The Joule-Thomson system includes the Joule-Thomson device itself and one or more of the following:

lubricating oil

dry gas seals

other seals

safety and shutdown systems

Action on abnormal situations

Action on abnormal situations includes the following:

recognising actual and potential problems

determining problems needing action

determining possible fault causes

rectifying problem using appropriate solution within area of responsibility

following through items initiated until final resolution has occurred

reporting problems outside area of responsibility to designated person

Start up/shut down as required

Start up/shut down as required includes the following:

start up and shut down to/from normal operating conditions

start up and shut down to/from isolated, cold and empty

start up and shut down to/from other conditions/situations experienced on the plant