You enter a cool building in Singapore and feel the result immediately. The system producing that comfort may extend well beyond the room, or even the building. This guide teaches 100 English vocabulary entries for district cooling: shared chilled-water networks, heat transfer, equipment, measurements and the language used to compare performance.
Singapore provides a concrete setting through SP Group’s district cooling work at Marina Bay and its descriptions of other cooling arrangements. The useful learning question is how a shared service connects plant, pipes and buildings. You will practise explaining that relationship clearly, without treating every building or every cooling scheme as identical.
Follow the heat before memorising the equipment. Then learn a group of ten words, explain a diagram aloud and try the numerical examples with their assumptions visible. “Top 100” is a curated learning list, not a measured ranking. The vocabulary examples and classroom scenarios are original illustrations; linked operator and technical sources support the factual context.
Choose a useful reading route
Read the guide in order, or begin with the task you need. Vocabulary chapters stay open for reading; the index below can be expanded when you want another section.
Start with the learner and context
Vocabulary groups: all 100 entries
- See the shared service · entries 1–10
- Follow heat rather than an imaginary cold substance · entries 11–20
- Read the water circuit · entries 21–30
- Name the cooling equipment · entries 31–40
- Connect the system to the room · entries 41–50
- Compare quantities on a clear basis · entries 51–60
- Observe and control performance · entries 61–70
- Talk about continuity of service · entries 71–80
- Discuss a project beyond its equipment · entries 81–90
- Explain the result to another person · entries 91–100
Worked learning, practice and next steps
1. Can you explain where the heat goes?
Draw three boxes: room, chilled-water circuit and plant. Put arrows between them and explain the direction of heat transfer during cooling. If your explanation ends with “the cold comes in”, begin with entries 11–20. That everyday phrase describes a sensation but does not yet explain the system.
Next compare these statements: “The equipment uses 60 kilowatts” and “The equipment uses 120 kilowatt-hours over two hours.” Are they necessarily contradictory? No: one gives a rate and the other an amount over time. If this distinction is uncertain, study entries 51–60 before attempting a performance comparison.
Finally ask what is included in the number. Is it the chiller alone, the plant including pumps, or a wider system? A learner may calculate accurately while comparing unlike boundaries. Keep that first answer; after the worked example, return and state the boundary explicitly. This is often the shortest route to a much better paragraph.
2. Singapore’s buildings as a connected system
SP Group’s district cooling overview describes shared cooling through chilled-water distribution and identifies Marina Bay among its projects. The same page presents distributed district cooling at Tampines and a centralised cooling arrangement at Tengah. These labels are a useful prompt to inspect the particular system, rather than assume that every project has one identical layout.
For the English learner, the distinctive opportunity is to connect several scales. A person notices comfort in a room; a facilities team discusses a building interface; a network operator considers shared infrastructure. Moving between those scales requires clear nouns and references. “It is more efficient” leaves the reader asking what “it” includes and what comparison was made.
A simple classroom diagram might show a plant sending chilled water to buildings and receiving warmer return water. Heat is transferred through equipment and ultimately rejected elsewhere in the system. The water circuit is a means of carrying thermal energy; the network does not create a magical material called cold.
Keep claims about savings, emissions or reliability attached to their source and date if you use them in a real report. This lesson does not assign one guaranteed percentage to every Singapore building. Occupancy, equipment, operating conditions and the chosen baseline can change what a comparison means.
For a longer application, eduKate’s district cooling explanation follows a fictional disagreement between a building and a network operator. Read its opening scenario after learning interface and measurement: explain why a supply reading and a room-comfort observation can concern different parts of the service.
3. See the shared service · entries 1–10
District cooling names an arrangement across buildings. A plant is a facility in this context, and a network is a set of connected routes or components. Those ordinary words acquire more precise meanings here.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 1. district cooling | Shared production and distribution of cooling to several buildings, commonly through chilled water. | a district cooling network | The diagram connected several buildings to a district cooling network. |
| 2. chilled water | Water cooled for use in a cooling system. | a chilled-water supply | The chilled-water supply carried cooling capacity towards the buildings. |
| 3. network | Connected system of routes or components. | an underground network | The illustration showed an underground network of pipes. |
| 4. plant | Industrial installation containing equipment; not a living plant here. | a cooling plant | The cooling plant appeared at the centre of the diagram. |
| 5. chiller | Machine that removes heat from a fluid. | an electric chiller | The guide located the electric chiller within the plant. |
| 6. building | Structure used by people or equipment. | a connected building | The connected building received a service through the network. |
| 7. utility | Service supplying an essential resource or function. | an urban utility | The class discussed cooling as an urban utility. |
| 8. centralised | Organised around a shared central system or facility. | centralised production | Centralised production changed where the main equipment was located. |
| 9. distributed | Spread among connected locations rather than confined to one point. | distributed cooling plants | The second diagram showed distributed cooling plants working together. |
| 10. infrastructure | Underlying facilities and networks supporting an activity. | energy infrastructure | The learner looked beyond the skyline to its energy infrastructure. |
4. Follow heat rather than an imaginary cold substance · entries 11–20
Temperature, heat and thermal energy are related but different. A useful explanation says what transfers, where it goes and which conditions affect the transfer.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 11. heat | Energy transferred because of a temperature difference. | remove heat | The explanation used remove heat rather than create cold. |
| 12. temperature | Measure describing how hot or cold something is. | a temperature reading | The temperature reading needed a unit and a location. |
| 13. thermal energy | Energy associated with the microscopic motion and interactions of matter. | thermal energy transfer | The arrows represented thermal energy transfer between parts of the system. |
| 14. heat transfer | Movement of thermal energy between locations or materials. | a heat-transfer process | The student explained the heat-transfer process in three sentences. |
| 15. conduction | Heat transfer through a material without bulk movement of that material. | heat conduction | The diagram showed heat conduction through the exchanger wall. |
| 16. convection | Heat transfer involving bulk movement of a fluid. | forced convection | A fan helped illustrate forced convection in the classroom model. |
| 17. heat exchanger | Device transferring heat between fluids, usually through separating surfaces. | a plate heat exchanger | The plate heat exchanger kept the illustrated water circuits separate. |
| 18. cooling load | Rate at which heat must be removed to meet stated conditions. | a changing cooling load | The fictional building had a changing cooling load through the day. |
| 19. capacity | Maximum or rated output under specified conditions. | rated cooling capacity | Rated cooling capacity was distinct from the measured load. |
| 20. demand | Amount of a service required over a stated time. | peak cooling demand | Peak cooling demand occurred during the invented afternoon scenario. |
5. Read the water circuit · entries 21–30
Supply and return are directions relative to the service. Water going back to the plant has not become useless; it belongs to a continuing circuit.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 21. pipe | Hollow conduit carrying a fluid. | an insulated pipe | The insulated pipe connected the plant with the building. |
| 22. supply | Flow or service delivered towards the user. | the supply line | The supply line carried cooler water in the simplified drawing. |
| 23. return | Flow travelling back after use. | the return line | The return line carried warmer water back towards the plant. |
| 24. flow rate | Volume or mass passing a point per unit time. | water flow rate | The report gave the water flow rate with its units. |
| 25. pump | Device that moves a fluid by adding energy. | a circulation pump | The circulation pump kept water moving through the loop. |
| 26. pressure | Force per unit area; here a fluid-system quantity. | water pressure | The gauge recorded water pressure at a specified point. |
| 27. pressure drop | Decrease in pressure along a flow path. | a pressure drop | The worksheet asked why the pressure drop mattered to pumping. |
| 28. valve | Device controlling or stopping fluid flow. | a control valve | The diagram identified the control valve without giving operating instructions. |
| 29. insulation | Material or arrangement that reduces unwanted heat transfer. | pipe insulation | Pipe insulation helped limit heat gain from the surroundings. |
| 30. loop | Closed or recurring flow path. | a water loop | The arrows followed the water loop back to its starting point. |
6. Name the cooling equipment · entries 31–40
These entries describe common equipment and refrigeration concepts. Not every cooling project has the same configuration, so match the words to the actual diagram or specification.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 31. refrigerant | Working substance transferring heat within a refrigeration cycle. | the refrigerant circuit | The learner separated the refrigerant circuit from the chilled-water network. |
| 32. compressor | Device increasing a gas's pressure by compression. | a chiller compressor | The diagram located the chiller compressor in the refrigerant circuit. |
| 33. evaporator | Component in which refrigerant absorbs heat while evaporating in this cycle. | the evaporator side | The explanation connected the evaporator side with heat removal from water. |
| 34. condenser | Component where refrigerant rejects heat as it condenses in this cycle. | condenser heat | The drawing showed condenser heat moving towards the rejection system. |
| 35. expansion device | Component reducing refrigerant pressure in a refrigeration cycle. | an expansion device | The student identified the expansion device as one part of the cycle. |
| 36. cycle | Sequence of processes that returns a system to a starting condition. | a refrigeration cycle | The refrigeration cycle transferred heat while using an energy input. |
| 37. cooling tower | Equipment rejecting heat, commonly through air contact and water evaporation. | a cooling tower | The illustration kept the cooling tower separate from the office air ducts. |
| 38. heat rejection | Release of unwanted heat to another environment or system. | a heat-rejection system | The heat-rejection system completed the simplified energy story. |
| 39. make-up water | Water added to replace losses from a system. | make-up water demand | The report distinguished make-up water demand from chilled-water flow. |
| 40. evaporation | Change from liquid to vapour at a surface or through a process. | water evaporation | The model used water evaporation to explain one heat-rejection mechanism. |
7. Connect the system to the room · entries 41–50
Chilled water and room air perform different roles. A coil can transfer heat between them without requiring the water to be sprayed into the occupied room.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 41. air handling unit | Equipment that conditions and circulates air within a building system. | an air handling unit | The building diagram showed an air handling unit after the cooling interface. |
| 42. coil | Tubing arranged to exchange heat with surrounding air or fluid. | a cooling coil | Air passed over the cooling coil in the simplified sketch. |
| 43. fan | Device that moves air. | a supply fan | The supply fan moved air through the illustrated duct. |
| 44. duct | Passage carrying air. | an air duct | The learner traced the air duct separately from the water pipe. |
| 45. ventilation | Provision and movement of air, including outdoor-air exchange. | outdoor-air ventilation | Outdoor-air ventilation was a separate question from room temperature. |
| 46. humidity | Amount of water vapour in air. | indoor humidity | The worksheet described indoor humidity without making a comfort diagnosis. |
| 47. condensation | Change of vapour to liquid. | surface condensation | The example showed surface condensation on a cool object. |
| 48. dehumidification | Removal of water vapour from air. | air dehumidification | The explanation distinguished air dehumidification from simple air movement. |
| 49. setpoint | Target value used by a control system. | a temperature setpoint | The display showed a temperature setpoint beside the measured value. |
| 50. comfort | State in which occupants find conditions acceptable; context-dependent. | thermal comfort | The class recognised that thermal comfort involves more than one number. |
8. Compare quantities on a clear basis · entries 51–60
Power is a rate; energy is a quantity accumulated over time. Efficiency comparisons need a defined output, input and boundary before a larger number means anything useful.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 51. power | Rate of energy transfer or use. | electrical power | The meter's power reading was expressed in kilowatts. |
| 52. energy | Quantity transferred or used over time. | electrical energy | The energy total covered the full observation period. |
| 53. kilowatt | Unit of power equal to one thousand watts. | kilowatts of cooling | The chart labelled kilowatts of cooling separately from electrical input. |
| 54. kilowatt-hour | Energy corresponding to one kilowatt sustained for one hour. | kilowatt-hours consumed | The example calculated kilowatt-hours consumed over a stated interval. |
| 55. efficiency | Relationship between useful output and resource input under defined conditions. | system efficiency | The report defined the boundary used to assess system efficiency. |
| 56. coefficient of performance | Ratio of useful heating or cooling output to energy input on a stated basis. | cooling coefficient of performance | The calculation used matching units for the cooling coefficient of performance. |
| 57. baseline | Reference condition used for comparison. | a measured baseline | The savings claim needed a measured baseline and comparable conditions. |
| 58. benchmark | Reference value or test for assessing performance. | a performance benchmark | The analyst checked whether the benchmark matched the plant type. |
| 59. part load | Operation below full rated output. | part-load operation | The exercise compared part-load operation with a peak-demand period. |
| 60. peak load | Highest demand within a specified period or condition. | the daily peak load | The fictional chart marked the daily peak load clearly. |
9. Observe and control performance · entries 61–70
A sensor detects something; a control system uses information to influence operation. A surprising measurement is a reason to investigate, not an automatic diagnosis of failure.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 61. meter | Instrument measuring a quantity used or delivered. | an energy meter | The energy meter's reading belonged to a stated time period. |
| 62. sensor | Device detecting a physical quantity. | a temperature sensor | The temperature sensor recorded the supply-water condition. |
| 63. measurement | Value obtained by observing with a stated method. | a reliable measurement | A reliable measurement still needed a unit and location. |
| 64. calibration | Establishing an instrument's response against a reference. | sensor calibration | The record included the date of sensor calibration. |
| 65. monitoring | Repeated observation to track behaviour over time. | continuous monitoring | Continuous monitoring produced a time series for review. |
| 66. trend | General pattern of change through time. | a rising trend | The rising trend concerned demand, not necessarily poorer efficiency. |
| 67. anomaly | Observation that differs from an expected pattern. | investigate an anomaly | The team investigated the anomaly before assigning a cause. |
| 68. alarm | Signal drawing attention to a defined condition. | a system alarm | The incident report recorded the system alarm and response time. |
| 69. control | Adjustment of a system towards intended behaviour. | automatic control | The diagram used automatic control to maintain a target condition. |
| 70. feedback | Measured response used to influence a system or improve work. | a feedback loop | The feedback loop compared the measured value with the target. |
10. Talk about continuity of service · entries 71–80
Maintenance and redundancy have different meanings. Neither term on its own proves that interruptions cannot occur. Describe what the source actually establishes.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 71. reliability | Ability to provide the intended function consistently under stated conditions. | supply reliability | The report defined the period used to discuss supply reliability. |
| 72. redundancy | Provision of additional components or paths to maintain a function. | equipment redundancy | Equipment redundancy was one feature of the fictional design. |
| 73. standby | Ready for use when required rather than continuously active. | standby equipment | The diagram labelled the standby equipment separately. |
| 74. maintenance | Work intended to keep equipment functioning properly. | planned maintenance | The notice described planned maintenance rather than an unexpected failure. |
| 75. inspection | Careful examination of condition or compliance. | a scheduled inspection | The log recorded a scheduled inspection by qualified personnel. |
| 76. commissioning | Checking and bringing a completed system into intended operation. | system commissioning | The project description separated installation from system commissioning. |
| 77. downtime | Period during which a service or component is unavailable. | recorded downtime | The report stated recorded downtime for a defined component. |
| 78. isolation | Separation of equipment or a section from a system. | system isolation | The article explained the term system isolation without a procedure. |
| 79. leak | Unintended escape of fluid through an opening. | a suspected leak | The fictional report distinguished a suspected leak from a confirmed one. |
| 80. repair | Work restoring a damaged or faulty component. | a completed repair | The record identified the completed repair and subsequent checks. |
11. Discuss a project beyond its equipment · entries 81–90
Space, interfaces, existing buildings and emissions accounting can all affect a comparison. A trade-off requires naming what is gained and what is given up.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 81. retrofit | Addition or modification of equipment within an existing installation. | a building retrofit | The building retrofit required attention to existing connections. |
| 82. interface | Point where two systems connect or exchange a service. | the building interface | The diagram made the building interface easy to locate. |
| 83. integration | Joining parts so they function together. | network integration | Network integration involved more than drawing a connecting line. |
| 84. thermal storage | Storage of cooling or heating potential for use at another time. | chilled-water thermal storage | The example used chilled-water thermal storage to discuss timing. |
| 85. load shifting | Moving demand from one time period to another. | peak load shifting | Load shifting changed when energy was used without proving a lower total. |
| 86. footprint | Area occupied, or environmental impact when specified. | equipment footprint | The caption used equipment footprint to mean occupied space. |
| 87. emissions | Substances released to the environment, here greenhouse gases when specified. | operational emissions | The report distinguished operational emissions from a whole-life assessment. |
| 88. assessment | Systematic examination using stated criteria. | a performance assessment | The performance assessment named its measurement period. |
| 89. boundary | Limit defining what is included in an analysis. | the system boundary | The system boundary determined whether pump electricity was counted. |
| 90. trade-off | Situation in which improving one aspect affects another. | a design trade-off | The class discussed a design trade-off using the supplied evidence. |
12. Explain the result to another person · entries 91–100
These verbs turn technical nouns into usable English. The strongest recommendation states its evidence, comparison and conditions in language its audience can follow.
| Entry | Meaning and usage | Natural collocation | Original contextual example |
|---|---|---|---|
| 91. describe | State the relevant features of a system. | describe the flow | The learner described the flow without reversing the arrows. |
| 92. explain | Make a mechanism or relationship understandable. | explain heat removal | The second sentence explained heat removal from the building. |
| 93. compare | Examine similarities and differences on a suitable basis. | compare two periods | The analyst checked weather and occupancy before comparing two periods. |
| 94. distinguish | Recognise a meaningful difference. | distinguish power from energy | The learner used the units to distinguish power from energy. |
| 95. calculate | Determine a value through mathematical operations. | calculate the total | The exercise asked pupils to calculate the total from invented readings. |
| 96. verify | Check a statement against appropriate evidence. | verify the claim | The editor asked for measurements to verify the claim. |
| 97. qualify | Limit wording so its scope or certainty is accurate. | qualify a saving | The phrase under these conditions qualified the reported saving. |
| 98. summarise | Express the main information more briefly. | summarise the diagram | The learner summarised the diagram for a younger reader. |
| 99. recommend | Propose an action with reasons; distinct from reporting a fact. | recommend further checks | The fictional analyst recommended further checks before a conclusion. |
| 100. transfer | Apply learning in a different context. | transfer the reasoning | A heat-pump example tested whether the reasoning transferred. |
13. One cooling result, two accounting boundaries
Consider an invented electric-chiller example. At a stated operating point, the chiller provides 300 kilowatts of cooling while taking 60 kilowatts of electrical input. Its cooling coefficient of performance on that boundary is 300 ÷ 60 = 5. The output and input are expressed in the same power units, so the ratio has no unit.
Now include an additional 15 kilowatts for pumps and other specified auxiliaries in the model. The broader system input is 75 kilowatts. With the same 300-kilowatt cooling output, the ratio is 300 ÷ 75 = 4. Both calculations can be correct because they answer questions with different boundaries. Calling the second calculation “wrong” would miss the change in what was counted.
Why can a cooling COP exceed one? Refrigeration moves heat using supplied work. Cooling output describes heat removed, not electricity generated. The ratio does not mean the machine creates energy. The US Department of Energy’s linked efficiency guidance provides the technical meaning of COP; its procurement context is not a Singapore rule.
If the chiller’s electrical input remains at 60 kilowatts for two hours, it uses 120 kilowatt-hours. The word remains matters: when power changes during operation, a single instantaneous reading does not establish the whole period’s energy use. This is an idealised arithmetic exercise, not a prediction of a real plant’s consumption.
A complete explanation might read: “At the stated operating point, the chiller-only cooling COP is 5. Including the specified auxiliaries changes the modelled ratio to 4.” That answer is modest, accurate and useful. It also travels well into science reports, presentations and conversations about a utility bill.
14. An email that asks the useful question
Illustrative email: “The proposal reports a lower energy use than the baseline. Before we summarise the saving, could you confirm the period compared, the cooling delivered and whether pumps are included? Please also clarify whether the figures are measured results or design estimates.”
This is purposeful technical English. It neither celebrates nor dismisses the proposal before understanding it. Baseline, boundary and measured identify missing information. Could you confirm makes a professional request without weakening the underlying question.
Now imagine a shorter reply for a younger student: “Both systems cool the building, but we must compare the same job over the same period and count the same equipment.” This is not less intelligent than the formal version. It expresses the relationship with more familiar words. Learn to move between the two registers.
In Singapore, the topic can connect classroom explanations with facilities management, engineering communication, project evaluation and everyday curiosity about buildings. You do not need to plan an installation to practise those skills. Reading a public diagram and asking a precise question is already a worthwhile task.
15. Test quantities, claims and explanations
1. Choose the word: the water travelling from the building back towards the plant is on the supply or return side? 2. Which term is a rate: power or energy? 3. A device detects temperature. Is its immediate role sensing or heat rejection?
4. In a hypothetical electric system, cooling output is 240 kilowatts and the stated electrical input is 80 kilowatts. Calculate cooling COP on that boundary. 5. A constant 40-kilowatt input continues for three hours. How much electrical energy is used? 6. Repair “This system always saves 30 per cent because one project reported that result.”
Answers: 1. Return, using the service direction described in this lesson. 2. Power. 3. Sensing. 4. 240 ÷ 80 = 3. 5. 120 kilowatt-hours, assuming the input is constant. 6. One possible repair is “That project reported a saving against its stated baseline; another system would need its own comparable assessment.” No real project percentage is being asserted in this exercise.
7. Explain why a cooling coil and a fan are not synonyms. A coil provides a heat-transfer surface; a fan moves air. 8. Give one question to ask before comparing two COP figures. A good answer could concern the operating conditions, equipment included or whether both figures use equivalent output and input definitions.
For writing transfer, produce a 100-word explanation of district cooling for a reader who knows ordinary air conditioning but has not seen a shared network. Use plant, chilled water, heat exchanger, return and boundary naturally. Then remove one technical term and explain the same idea in everyday language. The meaning should survive the change in vocabulary.
16. Questions behind familiar cooling words
Is chilled water the refrigerant? In the common arrangement described here, water distributes cooling between plant and buildings, while refrigerant operates within refrigeration equipment. Their roles differ; read the actual system design before generalising.
Does district cooling mean every building loses its own controls? The term identifies a shared cooling service. It does not by itself tell you the detailed control arrangements within each connected building. Separate network supply from room-level regulation.
Are kilowatts and kilowatt-hours interchangeable? No. Kilowatts measure power; kilowatt-hours measure energy. Use a time period and the relevant power profile when relating the two.
Does a high COP prove low total emissions? No. COP describes a particular performance ratio. An emissions assessment needs its own boundary and relevant inputs. A single equipment ratio cannot answer every environmental question.
Are these instructions for adjusting a cooling plant? No. The guide teaches language, diagrams and simple reasoning. Actual equipment operation and maintenance require the appropriate trained personnel and procedures.
17. From a diagram to an independent explanation
Begin with room, heat, coil, chilled water and plant. Draw their relationship and speak for thirty seconds with the list covered. In the next session, add supply, return, flow rate and pump. When that account is stable, learn power, energy, COP and boundary. A learner who knows the equipment already can start with the email task and numerical comparison.
Students can check every number for a unit and every comparison for a baseline. Parents can ask “Where does the heat go?” and listen for a connected explanation rather than a string of component names. Teachers can change the accounting boundary in a familiar problem to see whether the learner notices what must be recalculated.
The diagnosis route in English Tuition | Singapore is relevant when a learner understands the diagram but cannot organise the explanation in English. Identify whether the obstacle is a missing word, a sentence relationship or the order of ideas. More technical nouns will not repair every one of those problems.
Use the eduKate vocabulary learning hub to connect this list with wider scientific and explanatory vocabulary. The retrieval-practice guide can support later review. Your next task is to choose one public cooling diagram, explain it without copying its caption, then identify one performance question the diagram alone cannot answer.
18. Sources and further reading
Source notes checked on 23 October 2026. The cultural or industry records below support the factual context; dictionary entries clarify selected English senses. Definitions and teaching examples are written for this learning guide. Dates attached to events and records refer to those specific sources.