- Video Introduction of the New Aztec AMC Evaporative Cooling Air Turnover System
- Designing Data Centers as Thermos Bottles
- A New Video on YouTube Describing How the Aztec Evap System Works
- Aztec To Be In Capacity North America Exhibit Hall
- Virtual Reality
- A Simple Concept That Saves Big Dollars
- Indirect Evaporative Cooling Research Project Launched
- Canadian Patent Granted for Mestex Digital High Turndown Burner
- So You Think Your Critical HVAC System Is Reliable?
- Aztec Provides Fresh Air Intake Penthouses for Data Centers in Northwestern US
- Shading and Make-Up for Building Designers
- Credibility and Trust
- How I Spent My Summer Vacation
- Too Hot to Handle? A Simple Reminder.
- Preaching to the Choir
- Evaporative Cooling Anaysis for Data Modules in Two Diverse Climates
- Aztec Indirect Evaporative Cooling System on Display at DFW ASHRAE Golf Outing
- How We Used To Do It
- Air Pollution and HVAC
- Mestex, Division of Mestek YouTube Channel
- Aztec Evaporative Cooling for Data Centers at Data Center World
- GreenBuild Toronto
- Trane Division of Ingersoll-Rand in Lawsuit Over Wireless Technologies
- New BIM Objects From The Aztec Brand
- DOE Proposes Building Rating System
- The Importance of Correct Static Pressure for Direct Fired Make-Up Air Equipment
- Instant Online Document Lookup Using Microsoft Tags
- Do Evaporative Cooling Systems Use Too Much Water?
- Sustainability at Mestek Dallas
- Facebook Offers Their Outside Air Cooling Solution To All Data Center Owners
- Planning for Volatility
- Ever Wonder Where the Power Goes in a Data Center?
- ASHRAE TC 9.9 Expands Data Center Temperature Ranges Again
- Green Buildings Get Another Boost
- ASHRAE Show Report
- The Story of SHR or Why My Classroom is Stuffy
- CFD, Air Turnover, and the Pharmaceutical Industry
- It is not sustainable if it is not maintainable... or if it breaks down
- Accounting Rule Change Might Impact HVAC
- Reduce electrical demand load with an Aztec indirect evaporative cooling unit
- Lower Cost of Ownership with the Applied Air FAP
- Everything You Want to Know in a Flash
- Data Centers and Evaporative Cooling Webinar August 23
- New "Green" Product Announcement
- DDC Application Case Studies
- PowerPoint showing the importance of gas pressure, static pressure, and voltage
- Webinar: 'The Importance of Correct Gas Pressure, E.S.P. and Voltage'
- An Old Solution to a New Problem
Restaurant Energy Saving Idea That Can Be Used Anywhere
For those who might have missed it there is an interesting Technical Feature in the March, 2011 issue of the ASHRAE Journal. The article deals with "Energy Savings for Quick Service Restaurants" but some of the research applies equally well to other applications.
The article covers several energy saving measures for restaurants and includes a section on the mechanical cooling. The recommendation of the writer is to combine the benefits of a DOAS unit with conventional rooftop packaged HVAC units to achieve a significant energy savings. This same savings can be found when this concept is applied to school classroom wings, small single-story office buildings, or any building where the "normal" HVAC solution would be a series of 10 to 15 ton rooftop units.
The writer suggests a system that has a DOAS unit conditioning the total ventilation air requirement for the building but putting the dehumidified and filtered outside air into the return air ductwork for several pieces of conventional rooftop equipment. This has the effect of both removing the latent load from the conventional equipment and lowering the return air temperature of the standard rooftop equipment. The result for the conventional equipment is that it can be downsized significantly.
Downsizing rooftop HVAC units from the 10 or 15 ton size down to a 5 or 7.5 ton size will not only reduce capital costs for the project as a whole but, in general, packaged HVAC equipment has a higher EER in smaller sized equipment. That is because it often begins to fall into equipment categories that are covered under Federal and State energy codes for residential applications. The "blended" EER of the total system could actually go up as a result.
That is one reason why it is important to look at the impact of design decisions on a holistic basis whenever possible.