TONS of Waste Heat - Absorption Chilling?
TONS of Waste Heat - Absorption Chilling?
(OP)
Hello,
I am reviewing a site with TONS of waste heat:
110 Tons of LP Steam (0.8 barg)
40 Tons of LP Steam (4.3 barg)
25 Tons of MP Steam (20.6 barg)
25 Tons of MP Steam (22.3 barg)
All of the steam is produced from process reactors.
One idea thrown about is maybe we can use all the condensing heat from the steam in some type of Ab/Ad-sorption Chiller to supply the plants with cooler cooling/chilled water and allow us to either save electricity of increase rates (obviously the latter if possible).
I have read many DIFFERENT articles (including the handbook) on absorption chilling, but really, I don't understand what the potential tonnage of "chilled" water is that I can produce from each of these waste heat streams.
For example: Can the 110 tons of LP steam produce 35 tons of chilled water at 15-20 C? Are there are quick rules of thumb for something like this? Is this even feasible with today's technology, or just a big pipe dream? We are just at the early stages, and are trying to find out if this technolgoy is something worth looking into.
Thanks,
SVW
I am reviewing a site with TONS of waste heat:
110 Tons of LP Steam (0.8 barg)
40 Tons of LP Steam (4.3 barg)
25 Tons of MP Steam (20.6 barg)
25 Tons of MP Steam (22.3 barg)
All of the steam is produced from process reactors.
One idea thrown about is maybe we can use all the condensing heat from the steam in some type of Ab/Ad-sorption Chiller to supply the plants with cooler cooling/chilled water and allow us to either save electricity of increase rates (obviously the latter if possible).
I have read many DIFFERENT articles (including the handbook) on absorption chilling, but really, I don't understand what the potential tonnage of "chilled" water is that I can produce from each of these waste heat streams.
For example: Can the 110 tons of LP steam produce 35 tons of chilled water at 15-20 C? Are there are quick rules of thumb for something like this? Is this even feasible with today's technology, or just a big pipe dream? We are just at the early stages, and are trying to find out if this technolgoy is something worth looking into.
Thanks,
SVW





RE: TONS of Waste Heat - Absorption Chilling?
Low-pressure, steam-driven absorption chillers are available in capacities ranging from 100 to 1,500 tons. Absorption chillers come in two commercially available designs: single-effect and double-effect. Single-effect machines provide a thermal COP of 0.7 and require about 18 pounds of 15-pounds-per-square-inch-gauge (psig) steam per ton-hour of cooling. Double-effect machines are about 40% more efficient, but require a higher grade of thermal input, using about 10 pounds of 100- to 150-psig steam per ton-hour. So it.s feasible for you to run absorbers with the waste . I would talk to a manufcturer about this as they have the expertise to help you determine the amount of cooling you can produce.
RE: TONS of Waste Heat - Absorption Chilling?
I think the cost of fuel will make this a very important market.
RE: TONS of Waste Heat - Absorption Chilling?
RE: TONS of Waste Heat - Absorption Chilling?
The company I worked for as a technician had it's own steam power plant to drive the forging hammers for products such as Caterpillar diesel crankshafts, landing gear for all aircraft, etc.
We recovered the heat from those processes to drive rows of 5000 ton absorption chillers for the 50,000 employee plant.
RE: TONS of Waste Heat - Absorption Chilling?