Heat and energy recovery systems recover useful energy in one of several forms for use in a related or unrelated process system. This energy can be recaptured from heat, flow, pressure, and/or gases. There are three main applications for heat and energy recovery systems: commercial, industrial and residential. Commercial systems are designed for use in office buildings, retail complexes, hotels, and apartments. Industrial heat and energy recovery systems are designed for industrial applications...
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Q & A on Heat and Energy Recovery Systems

We asked our users for their input on Heat and Energy Recovery Systems. Here are the results of 59 users familiar with Heat and Energy Recovery Systems.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing heat and energy recovery system design?
9 answers
Answers:
The circulation of the exhaust gases can be considered as one of the research areas to influence the heat transfer in the HRSG.
~Engineering, Faculty/Staff/Student, Ahmedabad, India
Direct use of exhaust, thermal oil with heat exchangers.
~Jocelyne M, Manufacturer, Montreal, Canada
Desiccant type, heat exchanger efficiency.
~Engineering Consultant, Albuquerque, NM
Heat exchange processes and efficiency.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
Organic Rankin Cycle power plant.
~Brian K, Engineering Consultant, Dartmouth, Canada
Dessication wheels and elements.
~Charles C, Design Engineer, Miami, FL
Solar electricity generation.
~Engineering, Process/Production, New delhi, India
Nanotechnology
~Manufacturing, México
VRF
~Marketing/Sales, Suwanee, GA

Q:
From your perspective, which companies are creating the most innovative heat and energy recovery systems?
7 answers
Answers:
Munters, aaon
~Charles C, Design Engineer, Miami, FL
Mitsubishi
~Marketing/Sales, Suwanee, GA
York, Carrier, Trane
~Engineering Consultant, Albuquerque, NM
American Standard seems to make a really good product.
~Gary A, Purchaser, Vancouver, WA
In India, we have limited options and have to depend on non distinct companies with limited resources who can build/design as per our requirements and end usage.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
We do most of our projects internally.
~Schofield, WI
Thermax
~Engineering, Process/Production, New delhi, India

Applications and UseTop

Q:
What are some of the applications you have used heat and energy recovery systems for?
18 answers
Answers:
Instead of exhausting clean heat, we dump it into our building to reduce our MUA. We have designed and built control packages to reduce our heating energy by modulating equipment and providing feedback to the equipment. Currently we are working on another control package.
~Schofield, WI
Flue gas heat recovery, from boilers of all sizes, and food cooking facilities including potato chip oil cookers. HVAC systems.
~Brian K, Engineering Consultant, Dartmouth, Canada
Use of exhaust gas for biomass fuel drying, supplementary heat source for rubber crumb drying or rice drying.
~Jocelyne M, Manufacturer, Montreal, Canada
Power generation from biogas through biogas engines and heat & energy recovery from the waste streams of biogas engines.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
Heat recovery in exhaust air vented in IAQ code applications in assembly and high occupancy applications.
~Charles C, Design Engineer, Miami, FL
Economisers, condensate recovery, flash steam recovery, solar hot water generation.
~Engineering, Process/Production, New delhi, India
Radon in basement. Needed to have a fresh air exchange system.
~Gary A, Purchaser, Vancouver, WA
Outside air tempering, fresh air intake for community rooms.
~Engineering Consultant, Albuquerque, NM
Mostly large domestic and small commercial buildings.
~Engineering, Design, Cookstown, United Kingdom
HRSGs in Power and Waste Heat Recovery in Oil & Gas
~TA H, Design Engineer, Stjørdal, Norway
University Buildings and Lab Spaces. Residential.
~Technical Support/Services, Minneapolis, MN
Biogas power generation systems.
~Engineering, Consulting, Chicago, IL
1. Combined cycle power plant
~Engineering, Faculty/Staff/Student, Ahmedabad, India
Domestic residence
~Barnwell, Canada
Thermocompression
~Manufacturing, México
Boilers
~Engineering, Consulting, Kotkapura, India
Schools
~Marketing/Sales, Suwanee, GA
Drying
~Engineering, Design, Dillsburg, PA

Q:
Please share with us any “non-standard” applications that heat and energy recovery systems have been used for.
5 answers
Answers:
Using space within building foundation footprint for loose-packed rocks with enough interstitial space to permit air to flow. Use the rocks for thermal energy storage on a diurnal basis. Discharge warm air out through the rocks during the day and suck in outside air through the rocks at night.
~Brian K, Engineering Consultant, Dartmouth, Canada
Ventilation requirements for cold storage applications.
~Charles C, Design Engineer, Miami, FL
Everything we do internally is considered "non-standard". We enjoy being creative.
~Schofield, WI
To date we have worked for standard applications only, but we certainly would love to use the technology for some thing really non- conventional.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
Heat recovery from multiple heat sources.
~Jocelyne M, Manufacturer, Montreal, Canada

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of heat and energy recovery systems?
4 answers
Answers:
Yes. An oil fired (Bunker C) boiler that was retrofitted with an economizer that was designed for nat gas. The fin spacing was far too tight and it blocked up with soot and tar deposits.
~Brian K, Engineering Consultant, Dartmouth, Canada
None as such but certainly, we know about certain projects which became non- viable economically due to incorrect and insufficient usage of the possible recovery.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
Not filtering air, causing blockage of all outside air.
~Engineering Consultant, Albuquerque, NM
Poor engineering and real world conditions
~Charles C, Design Engineer, Miami, FL

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
7 answers
Answers:
High static range, low air cross over, multiple mounting options, multiple space arrangements, multiple curb adaptions,
~Engineering Consultant, Albuquerque, NM
Steam boilers running on solar cells for central air conditioning and heating for hotels and buildings
~Engineering, Process/Production, New delhi, India
Some sort of built-in air purifier that eliminates smells, too.
~Gary A, Purchaser, Vancouver, WA
No fillets, ample size for condensation(off spec operation)
~TA H, Design Engineer, Stjørdal, Norway
Heat recovery from biomass combustion systems.
~Brian K, Engineering Consultant, Dartmouth, Canada
Higher efficiency with lowest utility inputs.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India
Ease of adaptability for field retro-fit.
~Charles C, Design Engineer, Miami, FL

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of heat and energy recovery systems?
4 answers
Answers:
Do your research on choosing a system. Get a few installation bids. Check with local building code to determine adequate air exchange rates. This will help you decide how many minutes per hour to operate.
~Gary A, Purchaser, Vancouver, WA
Get a good understanding of entropy and realize that a Btu at high temperature is worth a lot more than a Btu at low temperature!
~Brian K, Engineering Consultant, Dartmouth, Canada
Use for large outside air intake areas or combined variable air volume applications.
~Engineering Consultant, Albuquerque, NM
Yes, we would like to tell them that opex should be the most important factor with ease of operation, service back-up and pollution matters should prevail over number of working system and prices for comparison of available technologies.
~V.A.Kumar K, G.M. Business Development (Non-conventional Energy Systems), Delhi, India

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using heat and energy recovery systems?
5 answers
Answers:
Make sure the installer follows the manufacturer's installation. Even if that means tearing sheet rock off and adding new supports to ensure intake and exhaust vents are roughly equal. This is a big deal. If not installed correctly, unit may not function as efficiently designed.
~Gary A, Purchaser, Vancouver, WA
Make up your mind as to what your goals are. Financial viability and/or environmental benefit? Assign a financial value to the environmental benefits to bring the overall financial viability results into one system of measurement; money saved.
~Brian K, Engineering Consultant, Dartmouth, Canada
Pre-determine the costs of maintenance and the component product life cycle.
~Charles C, Design Engineer, Miami, FL
Do your homework on manufacturing, and get to know which features were developed due to Enron's "power plant technical failure" in the times of brown outs etc in the States.
~TA H, Design Engineer, Stjørdal, Norway
Find the ease of maintenance products.
~Engineering Consultant, Albuquerque, NM



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