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VIDEO: POD Steamer

 

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POD STEAMER​

Behind the scenes of steam, flow, measurement and quality

  

Measuring Steam Energy and Evaluating Important Design and Installation Considerations​

It  is easy enough to experience steam; simply boiling water will produce  it. Most steamers on the market are simply water boilers and condenser  allowing steam to flow through a channel in order to direct steam vapors to an outlet or directing source. Steam is difficult to measure  accurately, mainly because of its sensitivity to changes in temperature  and pressure. Steam is often classified into three types, which reflect  the different pressure and temperature conditions that steam is subject  to.​​

  

Wet steam​ contains  steam and condensed water. The amount of water in wet steam is  designated by the term quality. The quality of steam refers to the  percent of steam flow that is steam and water by weight. Steam that is  90% steam and 10% water is known as 90% quality steam. Wet steam is the  most difficult type of steam to measure, and it is also known as quality  steam.



Saturated steam​ exists  at one pressure and corresponding temperature, and it does not contain  any water. Saturated steam is saturated with heat. If heat is added to  saturated steam, the temperature of the steam is increased above the  boiling point. If heat is removed from saturated steam, condensation  occurs, and the fluid becomes quality steam.

    

The  P.O.D. Pressure on Demand Steamer system was created for a purposeful  delivery of a “Extremely High Percent Quality Steam” (also known as  EHPQS) to be delivered a specified distance and produce a combination of  steam type, temperature, and velocity necessary to be most effective in  various types of vehicle film application and removal techniques as  required by the various manufactures specifications and supernatural conditions of use or exposure vehicle films receive over an applied  lifetime (life expectancy of the vehicle films).


In an effort to  keep cost down, we sourced components (when and where available) from  local or known sources and may therefore be why the P.O.D. Steamer  resembles the size, shape, weight and even sometimes the color of some  of its components or overall look. It is the math and science that makes  all the difference in the world in both cost and production and what  sets the P.O.D. Steamer apart from any other over-the counter or  commercial use Steamer!

 

Steam flow measurement


Most  steam flow measurement happens either with differential pressure (DP)  flowmeters or with vortex meters. DP flowmeters consist of a DP flow  transmitter together with a primary element. The primary element creates  a constriction in the flowstream, resulting in a reduction in pressure  downstream from the primary element. The DP flow transmitter senses the  difference in pressure upstream and downstream from the primary element,  and uses this value to compute flow rate. Bernoulli's Principle is used  to perform this calculation.The most common type of primary element  used in flow measurement is the orifice plate. Orifice plates are also  widely used for measuring steam flow. However, other types of primary  elements are also used. Flow nozzles work well with steam flow  measurement because they can readily handle the high velocities and pressures associated with steam flow. Other types of primary elements  used to measure steam flow include Venturis and averaging Pitot tubes.


Vortex  flowmeters are also used to measure steam flow. Vortex meters work well  because they cause minimal pressure loss and can tolerate high  temperatures and pressures common in steam flow. In distilled water heating, a volumetric vortex meter is often combined with a pressure  transmitter and temperature sensor. A flow computer uses these values to  compute mass flow. Multivariable vortex meters measure volumetric flow, pressure, and temperature, and use these values to calculate mass flow.  Multivariable vortex meters are a fast-growing product segment within  vortex flowmeters.


P.O.D. Pressure On Demand reserves the right  to keep our science and math proprietary but uses all 3 measurement  types in the development and testing of our production units for sale  now. The P.O. D. Pressure on Demand steamer has developed a unique and  specific way to heat, transfer and deliver distilled water into steam  and out through a further patented series of tips and heads to give a  specific temperature and velocity of steam in a specific vortex process  from the body of the machine through the unique size and length of hose consistently every time.


P.O.D. Pressure On Demand even focused on the density of our produced steam:

  • Steam is a compressible fluid
  • Density is a function of both temperature and pressure
  • Saturated steam: Temperature and pressure are dependent variables. Density can be calculated by measuring one variable.
  • Superheated  steam: Temperature and pressure are independent variables. You must  measure both to calculate density to measure mass flow and energy.

 

Specifics of our evaluations for production:

• Reliability

  • Does the sensing element of the meter contain moving parts that require periodic maintenance?
  • Are there analog transducers that can drift over time?
  • Are the pressure and temperature limitations of the equipment acceptable for the application?

  


 


  

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Accuracy

  

 • Rangeability/Turndown/Sizing

  • Rangeability: The range  over which an instrument can measure. (e.g. typical 3” vortex meter  measuring 100psig saturated steam; 420-12,700 lb/hr or 10-300 ft/s)
  • Turndown: The range specified as a ratio of highest measured value to lowest measured value. (i.e. in above example: 30:1)

• Multivariable vs. Discreet Components
• Internal vs User Installation Requirements

  • Snap-on vs Screw-on components
  • Ease of use for operator-turn it on and it works!Type your paragraph here.
  • Vortex  Shedding Principle - When any liquid, gas or vapor in motion hits a  solid body in its path, it flows around it shedding vortices alternately  on either side of the body.

 

 

Flow

The frequency of the vortices is directly proportional to the velocity of the fluid.
• System use, demand and shutdown required?
• Pressure drop

  • Most  OTC (over the counter) systems are sensitive to the introduction of  additional pressure drop and will not produce consistent outflow.
  • Vortex, velocity and down-flow measures to eliminate in POD System.
  • Can be hot tapped into existing systems (individual components) without interruption of service.

As  you can see there is a lot to consider when creating and building both a  steam machine specific to the target industry plus creating it at a  cost acceptable to the industry it is serving. The look of the machine  and the cost of the machine mean nothing compared to the functionality  of the machine. Most OTC machines will start looking alike or similar as  component manufactures are limited and being consolidated through  acquisition now days. To make sure costs are “at best”, at manufacturing  time, components can come from existing component manufactures rather  than every item be custom manufactured. Minimal modifications for the P.O.D. Pressure On Demand system to achieve our own specification will  still incur additional costs. The last test will be the users and their  acceptance of the product and its functionality specific for their needs  (F.A. B. Features, Advantages and Benefits) and the overall cost vs  time savings, reduced costs in other areas of the job it is performing.

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