Dehumidification >> Determine The Size For A Dehumidifier

Reverse osmosis, alternatively, is based on membrane technology. Using a high-pressure pump, seawater is forced to flow through a membrane. The membrane only allows freshwater to pass while filtering out the dissolved minerals. Freshwater is produced as a result of this filtering with any previously dissolved minerals retained on the Determine The Size For A Dehumidifier input side of the filter. 

The primary restriction on the use of conventional multi-effect distillation, multi-stage flashing, Determine The Size For A Dehumidifier and reverse-osmosis technologies is that they are highly energy intensive. The cost of freshwater produced by these three desalination technologies is directly dependent upon the cost of energy, primarily electricity and/or high-grade (high-temperature) thermal energy. 

While these technologies may be considered cost-effective in regions, such as the Middle East, Determine The Size For A Dehumidifier having abundant and economical local petrochemical energy supplies they are not well suited to regions such as Hawai'i because of the high energy cost. The primary energy source used in Hawai'i has long been unrefined oil shipped in from Southeast Asia. 

Additionally, these three conventional technologies operate under specialized temperature Determine The Size For A Dehumidifier or pressure conditions, e. g., multi-effect distillation requires working temperatures above 100° C, multi-stage flashing requires greatly reduced pressures, and reverse osmosis requires high initial flow pressures and produces asignificant reduction of these flow pressures. 

All of these technological requirements lead to high infrastructure Determine The Size For A Dehumidifier and operating costs. In contrast, humidification-dehumidification (HDH) seawater desalination represents a relatively new desalination method based on heat and mass-transfer processes. Normal atmospheric air is employed as the medium to convert seawater to freshwater. 

HDH seawater desalination involves two processes. Seawater is first Determine The Size For A Dehumidifier converted to water vapor by evaporation into dry air in an evaporator (humidification). This water vapor is then condensed out from the air in a condenser to produce freshwater (dehumidification). HDH seawater desalination operates under more moderate working temperatures (<80° C) and near-ambient system pressures and requires only moderate flow pressures. 

Given these more moderate system specifications, Determine The Size For A Dehumidifier low-cost materials such as conventional plastics may be used for system construction. These relatively easy-to-achieve construction requirements are expected to lead to a lower infrastructure cost. Because of the more moderate operating-temperature requirement, HDH seawater desalination can easily be driven by sustainable solar energy. 

This makes HDH seawater desalination particularly attractive to Hawai'i. While its geographical location makes electricity Determine The Size For A Dehumidifier and high-grade petrochemical-based thermal energy expensive in Hawai'i, there is abundant solar radiation throughout the islands. Several literature studies are available that explore HDH as an effective means for seawater desalination. 

The early Determine The Size For A Dehumidifier work includes those by Bourouni et al. (2001), Al-Hallaj et al. (1998), Assouad and Lavan (1988), Muller-Holst et al. (1999), Abdel-Salam et al. (1993), Xiong et al. (2005), Shaobo et al. (2005), Xiong et al. (2005), El-Dessouky (1989), Goosen et al. (2003), and Al-Hallaj and Selman (2002). 

In these studies conventional shell-and-tube heat exchangers were used as condensers for the dehumidification process. Film condensation over tubes is extremely inefficient as the process involves condensing water vapor out of a mixture of air Determine The Size For A Dehumidifier and water vapor. The presence of air adversely affects the access of water vapor to the cold tube surface. 

Klausner and co-workers at the University of Florida described (Klausner et al. 2004, Klausner et al. 2006, Li et al. 2006, Li et al. 2006) an innovative diffusion-driven desalination technology to overcome the aforementioned shortcoming. To enhance the condensation in the presence of air, Determine The Size For A Dehumidifier a direct-contact condenser was used in diffusion-driven desalination. 

The diffusion-driven desalination was powered by waste heat derived from low-pressure condensing steam from a power plant Determine The Size For A Dehumidifier and is viable for industrial-scale freshwater production. Practical implementation of solar-energy-driven HDH seawater desalination systems requires a fundamental understanding of thermal/fluid transport phenomena in virtually all system components. 

Our research team launched a research program to establish such a knowledge Determine The Size For A Dehumidifier base through combined theoretical modeling and experimental study. The project supported by the extension of the 2008 U.S. Geological Survey State Water Resources Research Institute Program (WRRIP2008) constitutes the Phase II of the research program. 

The focus of the Phase II research is on developing a laboratory-scale experimental system to study parametric trends of the freshwater-production rate. Methodology Figure 1 shows a schematic diagram of the laboratory-scale experimental system designed Determine The Size For A Dehumidifier and constructed in our research lab. The system is composed of three main fluid-circulation lines identified in Figure 1 as saltwater, air/vapor, and freshwater. 

In the saltwater line an insulated tank stores the saltwater. Heat generated by five 1000-W electrical cartridge heaters installed in the tank, Determine The Size For A Dehumidifier used in the experimental system to simulate solar-energy input, raises the saltwater temperature. A centrifugal pump transports the heated saltwater to an evaporator. 

The heated saltwater is sprayed through a nozzle into the top of the evaporator so that it comes into direct contact with ambient-moisture air being pumped into the bottom of the evaporator. A portion of the heated saltwater evaporates Determine The Size For A Dehumidifier and thus humidifies the ambient air. Any saltwater not evaporated collects at the bottom of the evaporator and is returned to the insulated storage tank as high-salt brine. 

In the air/vapor line ambient air is pumped, using a forced-draft blower, into the bottom of the evaporator where it rises Determine The Size For A Dehumidifier and comes into direct contact with the heated saltwater being sprayed into the top of the evaporator chamber. Direct contact with the heated saltwater humidifies the ambient air. 

The now-humidified air is drawn out of the evaporator chamber and pumped into a condenser. In the condenser chamber the now-humidified air comes into direct contact with cold, Determine The Size For A Dehumidifier working, freshwater being sprayed into the top of the condenser. From the humid air salt-free water vapor now condenses into liquid water and mixes into the working freshwater. 

The lowered-humidity air remaining after the condensation process is ejected into the external Determine The Size For A Dehumidifier ambient air as exhaust. In the freshwater line a storage tank holds a fixed amount (limited by the presence of a drain in the sidewall of the tank) of working freshwater. This water is circulated using a centrifugal pump. 

Before entering the condenser the freshwater is cooled in a chiller to lower its temperature. Additional Determine The Size For A Dehumidifier freshwater captured through the condensation process, in excess of the storage tank's fixed limit of working water, is the newly desalinated water and flows through the storage-tank's drain into a collecting tank.

Remove Lead Paint From Concrete

Lead is one of the most significant and widespread environmental hazards for children in Maryland. Children are at greatest risk from birth to age six while their neurological systems are developing. Sustained exposure to lead can cause long lasting neurological damage or death. Effects of sustained  read more..

Water Damage

Mold usually grows in extremely damp and humid areas such as basements and bathrooms. Mold Remediation Water Damage from the caulking around your bathtub or shower is very common problem. First, there are different kinds of caulking, the caulking needs to be a mold and mildew resistant type and there's no way to know  read more..

Biohazard Cleanup

Crime Scene Cleanup Biohazard Cleanup is definitely a unique and different job than most others. Not too many people, say that, that's what they want to do when they grow up. But it can be a very challenging and rewarding job for the people that like to help make a difference. It takes a special person, to be able to work wi  read more..

Water Extraction

Provide lots of ventilation during a Flood Damage Water Extraction and keep your eyes open for indications of carbon monoxide poisoning, like mild headaches that persevere or get worse, loss of breath, petulance, poor judgment, loss of memory, or rapid exhaustion. Never attempt to warm up your home with a gas burning   read more..

Lead Paint Removal Techniques

The employer selects the initial physician who conducts any medical examination or consultation provided to an employee under this section, the employee may designate a second physician: a. To review any findings, determinations or recommendations of the initial physician; and b. To conduct such exa  read more..

Tree Removal From Thunderstorms

The Inyo National Forest, Mammoth Ranger District is soliciting comments on a proposed project to remove wind-fallen trees from Reds Meadow Valley. On November 30 of last year an extreme wind event caused large numbers of trees to be blown down Wind Damage Tree Removal From Thunderstorms in the Reds Meadow Valley. 
<  read more..

Asbestos Tile

Yes No Top of Form How can we make better? (250 Character max.) We are collecting this info under OMB clearance number 1225-0059 Bottom of Form Thank you for your feedback! Please Contact Us if you have any other Asbestos Abatement Asbestos Tile comments or questions!  Thank you for your July 27 letter regarding the   read more..

Natural Remedy To Keep Animals Out Of My Garden

Managing the habitat:  The activities of people often create habitat for animals that eventually become a problem. Piles of brush, wood, rocks, dense tall grass and shrub areas provide Animal Damage Natural Remedy To Keep Animals Out Of My Garden cover for many species of wildlife. Better management of these are  read more..

Where Can I Get A Radon Test Kit

Where Can I Get a Radon Test Kit?If you are interested in finding a qualified radon service professional to test your home, you wish to purchase a radon test kit, or have questions about a radon measurement device: Contact your State Radon Contact to determine what are, or whether there are, Radon Mitigation Where Can I Get A Radon Test Kit re  read more..

What Does A Forensic Document Examiner Do

If the existing binding is too deteriorated to retain, Document restoration What Does A Forensic Document Examiner Do the book may be rebound in a binding made of new materials of conservation quality. A laced-in structure (Figure 4) is often chosen by conservators for books that are to be bound in leather.

When properly constructed this is  read more..