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The dual-function ammonia-water absorption cycle converts exhaust
heat from prime movers to high-value products. This new cycle excels
at efficiently converting heat in the range of 250°F
to 750°F
to electric power, refrigeration and/or air conditioning, in interchangeable
amounts depending on user needs. Considering a 1MWe gas turbine
with exhaust temperature of 750°F,
the absorption cycle can produce additional 400kW of power. In the
refrigeration mode, the same dual-function absorption cycle produces
more than 400 tons of refrigeration at 35°F,
or lesser amounts down to -50°F.
The absorption cycle can be directly integrated with
prime movers: turbines, micro-turbines, fuels cells, and reciprocating
engines. Moreover, the cycle can be integrated with a desiccant
system to supply low-level heat to regenerate the desiccant. Reject
heat can also be used for domestic hot-water heating or space heating,
thereby achieving extremely high overall energy conversion efficiency.
| Key Features |
- Significant increase in the overall energy conversion
efficiency
- Ideally suited to convert exhaust heat in the range of
250°F
to 750°F
to electric power and/or refrigeration
- Using the same equipment, electric power and refrigeration
are produced, simultaneously and interchangeably
- Air or water cooling option
- Direct integration minimizes exhaust gas pressure drop
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Applications
The heat-activated dual-function absorption cycle is ideally suited
for 1 to 15 MWe distributed power generators: turbines, micro-turbines,
fuel cells, and reciprocating engines. The mix of power and refrigeration
output is automatically adjusted to meet seasonal requirements.
For warm ambient conditions, part of the refrigeration can be used
for turbine inlet air cooling, thereby eliminating the severe degradation
in output which otherwise occurs.
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