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20 Cards in this Set
- Front
- Back
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What is the definition of waste heat? |
Any heat that is being removed from a building, exhausted to the atmosphere from the operation of any piece of equipment that can economically be recovered and repurposed to reduce operations cost and environmental impacts. |
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What does HVAC stand for? |
Heating ventilation and air conditioning |
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What form of waste heat does an HVAC ventilator recover? |
Heat from the exhaust air being discharged from a building envelope |
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Are HRV and ERV units passive or active heat recovery units? |
Active |
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What is another name for Gray water heat recovery? |
Drain water heat recovery |
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What factor governs how efficiently A DWHR device operates? |
The Temperature differential between the drain water and incoming cold water supply. The greater the differential the more efficient the system operates |
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Is in a refrigeration cycle what device rejects the heat? |
The condenser |
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In a refrigeration cycle where would you install a heat recovery device? |
Between the discharge of compressor and the condenser |
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Which device will recover more heat in an exhaust air heat recovery system? |
A heat pump |
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Is water the fluid used in an ORC power generation system? If not, Explain. |
Water is used in conventional rankine cycle power generation system. Organic fluids are used in an organic rankine cycle power generation plant. |
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Is there a carbon footprint in a waste heat power generation system? |
No |
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Which codes are referenced when fabricating the vaporizer, condenser and recuperator vessels in an ORC waste plant power generation system? |
ASME section 8 unfired pressure vessels |
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Are steam technicians/power engineers required to operate an ORC power generation plant? |
No |
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Which heat recovery device requires the least amount of maintenance? |
DWHR Drain water heat recovery |
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What efficiency do heat pumps usually run at? |
350-400% |
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What is cogeneration? |
The production of electricity using waste heat from and industrial process, or the use of steam from electric power generators as a heat source |
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What is the technical term for using steam to generate electricity? |
Rankine cycle power generation |
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What is a Rankine cycle? |
Where a fluid is being continually evaporated and condensed. Usually water and steam. |
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What is the main difference between the Rankine cycle and ORC? |
ORC uses organic fluids, requires a lower temp/pressure, and needs no superheat |
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What is a passive system? |
A system that operates with no outside mechanical means. (No pumps, controls, or devices used to actively recover lost heat) |
