Dehumidification >> Dehumidify A Flooded Home Without A Dehumidifier

As illustrated in Figure 1, the evaporator (c) and the condenser (e) are the most critical components and dominate the system performance. The evaporator is fitted with a porous tower-packing material, in this case HD Q-PAC® structured media (Lantec Products, Inc., Agoura Hills, CA), Dehumidify A Flooded Home Without A Dehumidifier providing an ultra-high surface area. 

The hot seawater that is sprayed into the top of the evaporator forms a water film on the surface of the tower-packing material while gravity-flowing downward along the evaporator. The cold dry air is pumped into the evaporator at the bottom Dehumidify A Flooded Home Without A Dehumidifier and blown upward into and through the wetted tower-packing material. 

The direct contact between the hot seawater and the cold, dry, air leads to a heat and mass-transfer process between the water and the air. The result of this heat Dehumidify A Flooded Home Without A Dehumidifier and mass-transfer process is that a portion of the seawater evaporates and thus humidifies the air and the air temperature increases and the seawater temperature decreases. 

Taking advantage of solar radiation to preheat the seawater before it enters the evaporator increases the freshwater production. As both the water-evaporation Dehumidify A Flooded Home Without A Dehumidifier and air/humidity ratio increase with increasing temperature, higher seawater temperatures lead to increased freshwater production. 

The condenser has a structure similar to that of the evaporator, i.e., it is a tower fitted with a porous tower-packing material, Dehumidify A Flooded Home Without A Dehumidifier in this case also HD Q-PAC® structured media. The humid warm air in the evaporator is pumped into the bottom of the condenser and blown upward. The air then comes into direct contact with cold freshwater being sprayed into the top of the condenser. 

As a result of a second heat and mass-transfer process, opposite to that in the evaporator, Dehumidify A Flooded Home Without A Dehumidifier air temperature decreases and the water vapor condenses out from the air into the freshwater. The water condensate constitutes the freshwater production from the system. In the test project a one-dimensional control-volume-based theoretical approach was adopted to model the aforementioned heat and mass-transfer processes in the evaporator and the condenser, respectively. 

Applying the mass-conservation principle to the counter-current air/water two-phase flow, Dehumidify A Flooded Home Without A Dehumidifier the energy-conservation principle to the liquid film, and the energy-conservation principle to the air core led to a group of governing differential or algebraic equations for the respective transport processes. These equations were solved numerically to yield a detailed description of the working characteristics of the evaporator and condenser. 

Principal Findings and Significance A theoretical model has been developed in this project that is able to predict the net Dehumidify A Flooded Home Without A Dehumidifier freshwater production of an HDH system under different operating conditions. The model is also able to provide detailed description of the temperature and humidity-ratio distributions in the critical system components of evaporator and condenser. 

The accuracy of the model is now to be assessed by comparing the model predictions with experimental results from an ongoing experimental study. The experimental study is Dehumidify A Flooded Home Without A Dehumidifier currently supported by the 2009 U.S. Geological Survey State Water Resources Research Institute Program (WRRIP2009) and constitutes Phase II of the research program. 

Upon validation, the model will provide an essential tool for the effective design Dehumidify A Flooded Home Without A Dehumidifier and practical implementation of solar-energy-driven HDH seawater desalination systems. Sample results from the model are presented below. Variables are defined as follow: Qa represents the air flow in cubic feet per minute (CFM); 

Ta represents the air temperature in degrees Celsius ( °C); Qf represents the water flow in gallons per minute (GPM); Tf represents the water temperature in degrees Celsius (°C); "ω" indicates the air/humidity ratio; The subscript "evap" indicates Dehumidify A Flooded Home Without A Dehumidifier the evaporator; The subscript "cond" indicates the condenser; The subscript "in" indicates an inlet; 

The subscript "out" indicates an outlet; The subscript "prod" indicates production. Figures 2 and 3 show the predicted results for a representative evaporator whose tower packing material section is 0.25 m in diameter Dehumidify A Flooded Home Without A Dehumidifier and 1 m in height. The seawater-inlet temperature at the top of the evaporator is set to be 60°C and the air-inlet temperature at the bottom of the evaporator is 20°C. 

Figures 2(a) and 2(b) show the predicted variations of outlet temperatures of air and seawater versus the cold-air flow, respectively, for the three seawater flows of 1.0, 2.0, and 2.5 GPM. As expected, Dehumidify A Flooded Home Without A Dehumidifier the air- and seawater-outlet temperatures decrease with increasing cold-air flows and increase with increasing hot-seawater flows. 

Figure 3 shows the predicted air outlet humidity ratio as a function of the cold-air flow for the three seawater flows of 1.0, 2.0, and 2.5 GPM. Figures 4–7 show the predicted performance of a condenser that has identical dimensions Dehumidify A Flooded Home Without A Dehumidifier and structure as those of the evaporator. The air-inlet conditions at the bottom of the condenser correspond to the air-outlet conditions under an evaporator hot-seawater flow of 2.0 GPM. 

The freshwater inlet temperature at the top of the condenser is set to be 18°C. Figures 4(a) and 4(b) show the predicted outlet temperatures of air and freshwater as a function of the cold-air flow, respectively, Dehumidify A Flooded Home Without A Dehumidifier for the three freshwater flows of 0.6, 0.8, and 1.0 GPM. Figure 5 shows the predicted freshwater production as a function of the cold-air flow for the three freshwater flows of 0.6, 0.8, and 1.0 GPM. 

Figures 6(a) and 6(b) show the predicted outlet temperatures of air Dehumidify A Flooded Home Without A Dehumidifier and freshwater as a function of the freshwater flow, respectively, for the three cold-air flows of 60, 80, and 100 CFM. Figure 7 shows the predicted freshwater production as a function of the freshwater flow for the three cold-air flows of 60, 80, and 100 CFM. 

Desalination produces freshwater by removing dissolved minerals from seawater. The process has a long history as an effective means to meet agricultural, domestic, Dehumidify A Flooded Home Without A Dehumidifier and industrial freshwater needs in coastal areas. Technologically mature conventional desalination processes that have been widely used to produce freshwater at industrial-scale include multieffect distillation, multi-stage flashing, and reverse osmosis. 

Multi-effect distillation and multi-stage flashing are based on liquid-vapor phase-change Dehumidify A Flooded Home Without A Dehumidifier processes where seawater evaporates to water vapor either at atmospheric pressure by adding heat (multi-effect distillation) or at greatly reduced pressure by lowering water's boiling point (multi-stage flashing). This water vapor then condenses to yield freshwater—leaving any previously dissolved minerals as waste byproducts.

How To Remove Mold On Drywall

I heard about "toxic molds" that grow in homes and other buildings. Should I be concerned about a serious health risk to me and my family?The term "toxic mold" is not accurate. While certain molds are toxigenic, meaning they can produce toxins (specifically mycotoxins), Mold Remediation How To Remove Mold On Drywall the molds them  read more..

Odor Control

Smoke damage could be extensive in all areas of your home Smoke Damage Odor Control and smoke can destroy your textiles and other building material surfaces. Always follow the cleaning instructions recommended by product manufacturer and your washable textiles may benefit from adding 1 to 2 cups of white vinegar t  read more..

How To Clean Fire Smoke Damage

Tips on how to handle the fire damage There are companies that are experts in cleaning and/or restoring your personal items.Whether you or your insurer buys this type of fire service, Fire Damage How To Clean Fire Smoke Damage be clear on who will pay for it. 

Be sure to ask for an estimate of cost for t  read more..

Asbestos Definition

Where asbestos definition can be found In the workplace Asbestos definition can be found in the workplace, particularly if you work or have worked as a(n): Brake repair mechanic Carpenter,  Demolition worker,  Dry wall finisher,  Electrician Insulation installer,  Miner,    read more..

How To Test The Air After Asbestos Has Been Remove

Route of Entry Inhalation, ingestion. II. Toxicology Clinical evidence of the adverse effects associated with exposure to asbestos is present in the form of several well-conducted epidemiological Asbestos Abatement How To Test The Air After Asbestos Has Been Remove studies of occupationally exposed workers, family contacts of workers, and persons living  read more..

How To Plan For A Flood

You and your family have been through a disaster. Your life has been turned upside down, and it will take time for things to return to normal. Take a few minutes to review the safety and Flood Damage How To Plan For A Flood health precautions listed at the top of this document. 

Also, you should watch out for sympt  read more..

FEMA Maps

Are lenders required to escrow flood insurance payments? Yes. If a lender, its servicer, or a Federal Agency lender requires the escrow of taxes, insurance premiums, fees, or any other charges for a loan secured by improved residential real estate or mobile homes, it shall also require the escrow of  read more..

How To Clean Up Fingerprint Dusting Powder

Sandi's decontamination foam, developed more than a decade ago for remediation of chemical and biological agents and used to decontaminate federal office buildings and mailrooms during the anthrax attacks in 2001,&nbs  read more..

Tools For Restoring Fire Damaged Electronics

While the conductivity of some conducting polymers may be as much as 100 times higher than that of MnO2, the improvement in capacitor ESR is not this dramatic. What is typically seen is reduction of capacitor ESR by a factor of between 2 and 4. The discrepancy is due to several factors. First,   read more..

How To Restore Flood Damaged Archive Photos

To create a collection, to inherit one, or to be given oversight of a collection, is also to create, inherit or accept a great responsibility. The challenge for collecting institutions is to meet the charge of stewardship and to assure that their valued collections, whether works of art, historical   read more..