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Full-Text Articles in Engineering
Further Investigation Of Energy And Performance Impacts Of Whole-House Dehumidifier Duct Configurations, Florida Solar Energy Center, Charles Withers, Jr.
Further Investigation Of Energy And Performance Impacts Of Whole-House Dehumidifier Duct Configurations, Florida Solar Energy Center, Charles Withers, Jr.
FSEC Energy Research Center®
This research project evaluated the energy impacts and dehumidification performance related to how ducted dehumidifiers (DHU) ducts were configured. Lab controlled testing over a variety of weather and latent loads evaluated five-different ducted DHU configurations as follows: Test 1 DHU air ducted from/to the central main body of building. Test 2 DHU air ducted from/to return side of central air conditioner (AC). Test 3 DHU air ducted from/to supply side of AC. Test 4 DHU air ducted from central main body and ducted to supply side of AC. Test 5 DHU air ducted from outdoors and indoors mixed before DHU …
Investigation Of Energy Impacts Of Whole-House Ducted Dehumidifier Location, Florida Solar Energy Center, Charles Withers, Jr.
Investigation Of Energy Impacts Of Whole-House Ducted Dehumidifier Location, Florida Solar Energy Center, Charles Withers, Jr.
FSEC Energy Research Center®
This report discusses energy impacts related to how ducted dehumidifier ducts are configured as well as where they are located. Lab controlled testing evaluated three different duct configurations. The three DHU lab test configurations were: 1) DHU air ducted directly from/to room, 2) DHU ducted from/to the central air return duct, and 3) DHU from/to the central air supply duct. Simulation effort evaluated conductive energy gains/losses through dehumidifier and its ducts for 1) conditioned space, 2) attic, and garage locations.
Residential Performance Code Methodology For Crediting Dehumidification And Smart Vent Applications Final Report, Florida Solar Energy Center, Robin Vieira
Residential Performance Code Methodology For Crediting Dehumidification And Smart Vent Applications Final Report, Florida Solar Energy Center, Robin Vieira
FSEC Energy Research Center®
As energy efficiency reduces the hours where air conditioning is called for, and as codes require outdoor air to be brought into homes, humidity levels in homes may rise to the point where dehumidification is required. However, there are currently no standards in Florida's Energy Conservation Code for dehumidification. Thus, a mechanical contractor that invests in an expense such as variable speed heat pumps or heat pipe technology in order to dehumidify and save energy receives little benefit relative to another home that installs an inefficient dehumidifier. A reference home dehumidification strategy needs to be established.Another strategy to reduce interior …
Case Study Of An Innovative Hvac System With Integral Dehumidifier, Florida Solar Energy Center, Richard Raustad
Case Study Of An Innovative Hvac System With Integral Dehumidifier, Florida Solar Energy Center, Richard Raustad
FSEC Energy Research Center®
In most applications, heating, ventilating, and air conditioning (HVAC) equipment is controlled to maintain an indoor dry-bulb set point temperature. Moisture removal by the HVAC system is considered to be an operational byproduct. During summer months, the operation of the HVAC system is usually sufficient to meet both the sensible and latent cooling loads. However, during other times of the year when sensible loads are reduced, the moisture load can be significantly higher than the available moisture removal capacity of the air conditioning system. This can lead to elevated indoor relative humidity levels and an uncomfortable indoor environment. In many …
Assessment Of The Effectiveness And Energy Efficiency Of Humidity Control Approaches In Vacant Florida Homes, Florida Solar Energy Center, James Cummings
Assessment Of The Effectiveness And Energy Efficiency Of Humidity Control Approaches In Vacant Florida Homes, Florida Solar Energy Center, James Cummings
FSEC Energy Research Center®
In a hot and humid climate such as Florida, 'snowbirds' that leave their homes for extended summer periods need guidance on effective and energy efficient methods of humidity control. Experiments were performed in seven residences to evaluate various approaches to humidity control, including providing no mechanical system control. A humidity target was identified to maintain indoor relative humidity (RH) at 65% or lower most of the time. Providing no mechanical conditioning (letting the building 'float') yields relative humidity at 65% or below during hot and sunny weather in some homes, but not during cloudy weather. Setting the AC system thermostat …
Nightcool: A Nocturnal Radiation Cooling Concept, Florida Solar Energy Center, Danny Parker
Nightcool: A Nocturnal Radiation Cooling Concept, Florida Solar Energy Center, Danny Parker
FSEC Energy Research Center®
An experimental evaluation has been conducted on a night sky cooling system designed to substantially reduce space cooling needs in homes in North American climates. The system uses a sealed attic covered by a highly conductive metal roof (a roof integrated radiator) which is selectively linked by air flow to the main zone with the attic zone to provide cooling - largely during nighttime hours. Available house mass is used to store sensible cooling. Currently, the system's capability for solar dehumidification with minimal electricity input is demonstrated.
Closing The Gap: Getting Full Performance From Residential Central Air Conditioners. Task 4.2-Develop New Climate-Sensitive Air Conditioner, Design, Construction, And Testing., Florida Solar Energy Center, Don B. Shirey Iii
Closing The Gap: Getting Full Performance From Residential Central Air Conditioners. Task 4.2-Develop New Climate-Sensitive Air Conditioner, Design, Construction, And Testing., Florida Solar Energy Center, Don B. Shirey Iii
FSEC Energy Research Center®
This study evaluated the performance of a prototype air conditioning system. The configuration of the prototype was based on detailed simulation results performed as part of this study. The results of the previously completed simulation indicated that energy-efficient, properly-ventilated homes in humid climates need equipment options or configurations that can provide a modest amount of additional dehumidification capacity while coordinating their operation with conventional cooling and ventilation systems. A prototype air conditioning system was constructed using currently available components and provides a method to independently control sensible (temperature) and latent (moisture) building loads. The prototype system was tested in both …
Closing The Gap: Getting Full Performance From Residential Central Air Conditioners, Task 4 - Develop New Climate-Sensitive Air Conditioner, Simulation Results And Cost Benefit Analysis, Florida Solar Energy Center, Hugh Henderson, Jr.
Closing The Gap: Getting Full Performance From Residential Central Air Conditioners, Task 4 - Develop New Climate-Sensitive Air Conditioner, Simulation Results And Cost Benefit Analysis, Florida Solar Energy Center, Hugh Henderson, Jr.
FSEC Energy Research Center®
This study evaluated the impacts of conventional and advanced cooling and dehumidification equipment on residential indoor humidity levels and annual energy consumption using whole building computer simulations. The life-cycle cost premium for the various advanced systems was also estimated. Building models were developed for a standard HERS Reference house, meant to represent current residential construction practice, and a High-Efficiency house that would likely qualify for a federal tax credit. The different houses were simulated in seven southeastern U.S. cities and with two ventilation/infiltration scenarios: 1) variable or natural infiltration alone, and 2) mechanical ventilation that complied with ASHRAE Standard 62.2-2004. …
Abstract/Conclusion: Understanding The Dehumidification Performance Of Air-Conditioning Equipment At Part-Load Conditions, Florida Solar Energy Center, Don B. Shirey Iii
Abstract/Conclusion: Understanding The Dehumidification Performance Of Air-Conditioning Equipment At Part-Load Conditions, Florida Solar Energy Center, Don B. Shirey Iii
FSEC Energy Research Center®
Air conditioner cooling coils typically provide both sensible cooling and moisture removal. Data from a limited number of field studies (Khattar et al. 1985; Henderson and Rengarajan 1996; Henderson 1998) have demonstrated that the moisture removal capacity of a cooling coil degrades at part-load conditions, especially when the supply fan operates continuously while the cooling coil cycles on and off. Degradation occurs because moisture that condenses on the coil surfaces during the cooling cycle evaporates back into air stream when the coil is off. This degradation affects the ability of cooling equipment to maintain proper indoor humidity levels and may …
Understanding The Dehumidification Performance Of Air-Conditioning Equipment At Part-Load Conditions, Florida Solar Energy Center, Don B. Shirey Iii
Understanding The Dehumidification Performance Of Air-Conditioning Equipment At Part-Load Conditions, Florida Solar Energy Center, Don B. Shirey Iii
FSEC Energy Research Center®
Air conditioner cooling coils typically provide both sensible cooling and moisture removal. Data from a limited number of field studies (Khattar et al. 1985; Henderson and Rengarajan 1996; Henderson 1998) have demonstrated that the moisture removal capacity of a cooling coil degrades at part-load conditions - especially when the supply fan operates continuously while the cooling coil cycles on and off. Degradation occurs because moisture that condenses on the coil surfaces during the cooling cycle evaporates back into air stream when the coil is off. This degradation affects the ability of cooling equipment to maintain proper indoor humidity levels and …
Latent And Sensible Load Distributions In Conventional And Energy Efficient Residences. Final Report, January 1983 - January 1986. 05-86., Florida Solar Energy Center, Alp Kerestecioglu
Latent And Sensible Load Distributions In Conventional And Energy Efficient Residences. Final Report, January 1983 - January 1986. 05-86., Florida Solar Energy Center, Alp Kerestecioglu
FSEC Energy Research Center®
To develop a method to characterize the cooling load distributions in conventional and energy efficient residences, specifically as related to building dehumidification loads, as they pertain to the potential for the use of gas-fired dehumidification and cooling equipment.
Air Conditioner Fan Speed Controller For Comfort And Dehumidification, Florida Solar Energy Center, Mukesh Khattar
Air Conditioner Fan Speed Controller For Comfort And Dehumidification, Florida Solar Energy Center, Mukesh Khattar
FSEC Energy Research Center®
Air conditioners perform the dual functions of cooling and dehumidifying. Many air conditioner units do not adequately dehumidify the air in Florida's humid climate. The quest for higher energy efficiency ratings (EER) has produced units that perform poorly in moisture removal. What follows is a simple and cheap method to increase the moisture removal performance of any air conditioner.