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Home └Course 5 — Selection and System Design └Quiz 5: check your understanding

Course 5 — Selection and System Design

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Quiz 5: check your understanding

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1. A datasheet lists 10 kW at 20 °C DB / 15 °C WB, water 15 → 55 °C. At 5 °C ambient you should expect:
more than 10 kW exactly 10 kW less than 10 kW the same kW but lower COP only
2. The main purpose of an operating envelope is to show:
noise levels safe ambient and water temperature combinations refrigerant charge pump head
3. Daily hot water energy for 3,000 L heated by 35 K is about:
61 kWh 122 kWh 244 kWh 35 kWh
4. Increasing running hours from 8 to 16 h for the same daily load generally:
doubles the HP size halves the HP size but needs more storage needs no storage halves running cost
5. In a well stratified tank, the heat pump should take its feed from:
the top the middle the bottom the hot outlet
6. Indirect heating via a PHE is preferred when:
water is RO-treated and soft water is hard or the fluid is not clean water maximum COP is the only goal the site has no space
7. Flow for a 20 kW heat pump at ΔT 5 K is about:
0.86 m³/h 1.7 m³/h 3.4 m³/h 6.9 m³/h
8. In a hybrid solar + HP + boiler system, the normal operating priority is:
boiler, HP, solar HP, boiler, solar solar, HP, boiler all together
9. In a cascade of heat pumps on a common header, each unit needs a non-return valve mainly to:
reduce noise stop flow bypassing back through idle units raise COP meter energy
10. For a swimming pool with chlorinated water, the best condenser material is:
copper SS304 titanium mild steel