Posts Categorized: Pumped Glycol Systems

Project Snapshot | Dartmouth College – Konvekta System

The new existing Burke Hall Chemistry Building was built in the 1950’s. The mechanical systems were renovated in the early 1990’s. A state of the art Konvekta energy recovery system was retrofitted into the system in 2012 to save energy from the 120,000 cfm of exhaust from the labs. Project Name: Dartmouth College – Burke Hall Science… Read more »

Project Snapshot | UMass Boston – Integrated Science Complex

The new 220,000 square foot Integrated Science Complex at the University of Massachusetts – Boston Campus will be the first new academic building on the campus since it opened in 1974.  The building is expected to achieve LEED Silver certification and will open in 2014.  A state of the art Konvekta energy recovery system is… Read more »

Pumped Glycol Energy Recovery | Filtering Exhaust Air

Just skip the pre-filters in front of the exhaust side of the energy recovery device?   Is that wise?  We know that adding filters can impact costs: cost to purchase pre-filters labor to change disposal costs increased pressure drop This question has been asked before and opinions have been offered by facility engineers.  Prefilters in Front… Read more »

Pumped Glycol Energy Recovery | Preliminary Design Questions

Preliminary Design Questions for a Pumped Glycol Energy Recovery System: Every energy recovery design starts with a list of questions that should be answered.  If these items are explored and discussed early on it makes for a significantly better design.  There are several distinct advantages in packaged pumped glycol systems from Konvekta.  A key system… Read more »

Ask Rick: Pumped glycol energy recovery systems | Reasons for poor performance in traditional systems

Q.  You have mentioned that traditional pumped glycol energy recovery systems were your least favorite choice for air-to-air energy recovery.  What are the reasons for that? A.  It starts with efficiencies.  Pumped Glycol systems in this country, until the recent introduction of Konvekta, have provided the lowest efficiencies for all choices.  The best we could… Read more »

Ask Rick: Glycol Run Around Loops | What is a typical face velocity for a pumped glycol system?

Q.  What is a typical face velocity for a pumped glycol system like Konvekta? A.  Konvekta pumped glycol energy recovery coils work anywhere in the range from 50-1000 FPM face velocity.  It’s typical for coils to be sized between 350 and 500 FPM.  There is always a trade-off between face velocity ( air pressure drop… Read more »

Ask Rick: Glycol Run Around Loops | Why do we not use Ethylene Glycol in the USA?

Q.  Why do we not use Ethylene Glycol in the USA? A.  Great Question.  We use pumped glycol energy recovery systems all the time here in the United States.  Up until recently we have almost exclusively used Propylene Glycol.  Ethylene Glycol had not even been a choice.  The biggest reason for this is that Ethylene… Read more »

Ask Rick: Pumped Glycol Systems | Does Air in the Glycol impact performance?

Konvekta Pumpd Glycol Pumping Package

Q.  I have some questions about pumped glycol systems.  What happens if all the entrapped air is not removed from the glycol?   Should a closed loop have auto bleed? A.   Air bubbles entrapped in the glycol circuit are very detrimental to the thermal performance of the energy recovery system.  It causes the heat transfer… Read more »

Ask Rick: Pumped Glycol Energy Recovery | Pressure Drop for Konvekta Coils?

Q.  What is a typical pressure drop across the Konvekta coils? A.  The air pressure drop across the coils depends on several factors: number of rows, air face velocity, fin spacing and tube alignments. There is a trade-off between thermal efficiency and air pressure drop which will be one of the design considerations if we… Read more »

Pumped Glycol Energy Recovery | Konvekta High Performance Heat Exchanger Coil

Konvekta is the only supplier of high efficiency pumped glycol run-around energy recovery systems in the world.  They have been in the business of pumped glycol energy recovery  since 1949.  That’s all they do.  Konvekta offers complete systems – high performance heat exchangers, energy recovery system controls and hydraulic assembly. The Konvekta coil design is… Read more »