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Humidity Control

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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.

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  • Mar. 27, 2013
    Article
    HPAC Engineering

    New Method for Calculating Evaporation From Occupied Swimming Pools

    In 2003, author Mirza M. Shah introduced two formulas for calculating evaporation from occupied swimming pools, one empirical and one theoretical. While those formulas showed reasonable agreement with data from several sources, it was felt greater accuracy was needed. Shah’s efforts to meet that need have resulted in a new formula showing good agreement with all available test data. This article presents the new formula, as well as lookup tables to simplify its use....More
  • Jan. 9, 2013
    blog

    Humidity and temperature meter

    The HUMICAP HM40 hand-held humidity and temperature meter is available in both standard and remote-probe models. The remote probe increases the versatility of the meter by enabling convenient measurements in ducts and other difficult-to-reach or confined places. Other features include an interchangeable HMP113 probe. —Vaisala AHR Booth 872...More
  • Mar. 1, 2012
    article

    Product Spotlight

    Liquid-desiccant system The DuTreat Roof Top (DTRT 5000/30) rooftop air-conditioning and dehumidification system uses a salt-water-based liquid desiccant. The salt water naturally absorbs humidity, cools air, and removes most airborne microorganisms in ......More
  • Dec. 1, 2011
    article

    Optimizing the Energy Efficiency of Desiccant Dehumidifiers 1

    There are two basic types of desiccant dehumidifiers: liquid and solid. This article will focus on solid-desiccant equipment....More
  • Oct. 1, 2011
    article

    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...More
  • Oct. 1, 2011
    article

    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....More
  • Sep. 1, 2011
    article

    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....More
  • Nov. 1, 2010
    article

    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."...More
  • Oct. 1, 2010
    article

    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....More
  • Sep. 1, 2010
    article

    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....More
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