Humidification/Dehumidification
Optimizing the Energy Efficiency of Desiccant Dehumidifiers
There are two basic types of desiccant dehumidifiers: liquid and solid. This article will focus on solid-desiccant equipment....
Evaporative Pool Dehumidification
The original pool dehumidification unit (DHU) used heat of rejection from the refrigeration system to heat pool water and provide hot-gas reheat. The system MASA chose (IDECVAV) is a direct-fired, variable-volume, 100-percent-outdoor-air unit equipped with an indirect evaporative precooler used to provide sensible cooling and heating-season energy recovery...
Simplified Method of Calculating Evaporation From Swimming Pools
Accurate calculation of evaporation from swimming pools is needed for proper sizing of ventilation and dehumidification equipment. Calculations are needed for both occupied and unoccupied conditions for proper modulation of equipment capacity, as well as estimation of energy consumption. ...
Temperature, Humidity Control Make Power Plant’s Pollution Control Possible
Merrimack Station, a power plant in Bow, N.H., owned and operated by Public Service of New Hampshire (PSNH), burns 4,000 tons of coal a day, as it generates enough power to satisfy the energy needs of one-third of New Hampshire’s population. The fly ash produced during the combustion of coal contains a trace amount of mercury that is emitted into the atmosphere. The plant's operators sought to reduce these emissions to improve the environment and public health, and to meet strict air-quality legislation recently passed in New Hampshire. ...
Fast Action and Expert Drying Ensure Water-Damaged Hotel Opens on Time
The project's general contractor, Welbro Building Constructors, immediately contacted Munters Moisture Control Services (MCS). Within 45 min, Ken Gennett, Florida restoration account manager for Munters MCS, was on the scene. "When I arrived on site, water was still pouring everywhere," Gennett said. "It drenched you from above, ran through the lobby, and flowed down the stairs." ...
Data-Center Uptime & Energy Efficiency
Many data centers are "mission-critical," meaning essential to the core function of an organization. As such, they must remain operational at all times. However, that does not mean significant improvements in energy efficiency and sustainability cannot be made....
Fog-Humidification Units Play Major Role in Facility’s Cooling-System Improvements
In the Commonwealth of Virginia's Division of Consolidated Laboratory Services (DCLS) building in Richmond, gas-fired clean-steam humidifiers used to offset dry winter air were causing problems. ...
Natatorium Dehumidification Units Improve IAQ, Boost Energy Efficiency
Constructed in 1968, the Burdick Hall natatorium on the campus of Towson University in Towson, Md., lacked air conditioning, which resulted in a significant lack of temperature and humidity control. Furthermore, the ventilation equipment was in poor operating condition and well past its economic life....
Cooling-Tower Design for Critical Applications
Several factors need to be addressed prior to determining the appropriate cooling-tower system for a facility with critical demands. Locations, such as data centers, medical centers, airports, and electronic-chip manufacturers, require special considerations in addition to the requirements of an average cooling-tower system....
PRODUCT SPOTLIGHT
Gas-to-Steam Humidifier Helps Museum Preserve Artifacts, Reduce Energy Costs
Dedicated to the memory of Glenn H. Curtiss, who in 1908 manned the first pre-announced public flight in America, the Glenn H. Curtiss Museum in Hammondsport, N.Y., is filled with hundreds of historical artifacts. Made of a variety of materials (wood, canvas, fabric, paint), those artifacts are subject to cracking, chipping, peeling, and distortion without the right amount of humidity—ideally, 40- to 60-percent relative humidity (RH). The museum, however, lacked a humidification system, and RH hovered between 3 and 10 percent....
Temporary Dehumidification Protects High-End Millwork in New Ballpark
Located in the historic Warehouse District of downtown Minneapolis, Target Field, the new 40,000-seat, open-air ballpark Major League Baseball’s Minnesota Twins call home, includes themed restaurants, state-of-the-art locker rooms, and 54 private suites. The ornate millwork, cabinetry, and high-end finishes in these and other indoor areas required special care during the facility’s construction in 2009. ...
Energy-Recovery Units Help Florida Resort Balance Ventilation and Moisture Control
For the new Ocean Towers at Hammock Beach Resort in Palm Coast, Fla., the owner and engineer wanted equipment that would provide uncompromised comfort...
Optimizing Dedicated Outdoor-Air Systems
Though vital to maintaining good indoor-air quality, outdoor air can be expensive to temper and, if not conditioned properly, cause humidity problems...
Improving IAQ With Liquid-Desiccant Dehumidification
Commercial and industrial HVAC systems represent a large portion of U.S. energy consumption. According to the U.S. Environmental Protection Agency (EPA),...
New Cooling-Coil Dehumidifier Helps Clean Up ‘Mess’ of Hotel Pool Area
GB Systems renovates hotel pool area with funding assistance from Puget Sound Energy...
Health-Care Dehumidification
With much of a health-care facility's profits impacted by the type and quantity of surgeries performed, hospital administrators are prioritizing indoor...
How to Calculate Humidification Loads
Most humidifier manufacturers have software to help size and select humidification equipment. Still, it is important to understand the theory behind calculating...
High-Pressure Humidification System Yields Annual Savings of $300,000
With nearly 5,000 employees and annual operating revenues in excess of $3.3 billion, Alliant Energy Corp. provides regulated electric and natural-gas...
Hidden Risks of Green Buildings
In years past, the marketing claim that mattered most to consumers perhaps was developed by NASA. Today, it likely is or any of its variations (organically...
Dehumidification Design Using Data-Center Heat
Considerable energy savings are possible with an innovative approach to HVAC dehumidification design using the typical network/server room or data center...
Steam Humidification: Reducing Energy Use, Heat Gain, Condensate
Steam humidification is considered essential for most process (e.g., semi- conductor manufacturing, printing) and health applications. Given the energy...
Mystery Leak
We had been enlisted to perform a 1,000-sq-ft tenant fit-up within an 8-year-old medical office building. A large meeting room was to be converted to...
Dehumidification-System Installation
Proper installation of all components in dehumidification systems is essential to achieving design conditions. This article addresses installation issues...
Dehumidification Technologies
Humidity control is a critical aspect of treating air for air conditioning and air used in manufacturing or other non-standard processes. Moisture affects...
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