Welcome to BXV

Cooling system with bxv

Grounds

All companies in the cooling / heating industry are attempting to achieve greater efficiency through better COP.
Many skilled and highly educated R & D is working hard to bring something extra to be added to their company's product portfolio.
Despite great efforts, it is always difficult to find the "final solution". There are always competitors who are doing something different, and sometimes something revolutionary. In fact, the number of qualified engineers and highly qualified scientists is very high in this area.
Although one company hired all people in R & D would this company  still not be able to achieve all innovations.
If one of the competitors could offer their customers in your industry 10% better performance with no or with very low additional cost, so it would be a big negative factor for those companies that fail to meet the new standard. If one company in your industry were number one in the controll of the COP, this situation would provide a enormous pressure in market , for not mentioning
the people who are debating environmental problems (the politicians).

The cost would be huge to be able to turn back the clock to get  large numbers of customers let us say 20-30% to return to " the technology retreat  company."
The employees of this company would not like to work during such "bad weathers". History is full of bad examples of
what happens when a company cannot reach the new and higher level and not adapting to best
Data :

The market for control valves used for commercial cooling,
transportation and for residential air conditioning turns over around
3,7 € (5 US) BILLION per year  with an average price of approx.
18 € (25US) per valve unit.


Danfoss, Parker and Emerson deliver thermostatic valves for the most part.
Saginomiya and Fuji-Koki are market leaders when it comes to electronic
expansion valves along with a relatively new and
extremely fast-growing  Chinese actors:
Dunan Co with TEX+ Electr and Zhejiang Sanhua Co with DC stepping motors.

Refrigeration industry, turns over around 110€ (*150US) Billion / year.

30M     Commercial refrigeration = AC foods cold / freezer systems Ice fabrication dryer heat pumps .

60M     Units,  small AC unit for the home o apartment market RAC Room AC / PAC (Package exceeding 5 kW)

120M   Units = Car AC = M.A.C Mobile  Air  Conditioning

BXV technology is mainly on the commercial market with Chillers Heat Pumps food smart grid slurry machine,  but will also work
"The Noble Art of Heat Transfer"

1.EFFECTIVE

2.ENERGY-SAVING

3.TEC

ASERCOM WINNER 2006 FOR A BUBBLE EXPANSION VALVE ACHIEVING BETTER PERFORMANCE FOR COOLING SYSTEMS WITH FLOODED EVAPORATORS.

                                                                                 ASERCOM JURY

                                                                                 Professor Dr Horst Kruse      Germany

                                                                                 Prof. Henk van der Rhee       Nederland

                                    

Heat Transfer
Heat Exchangers
Heat Pump
  • Air to air for low condenser temperature and very simple installation from electrical heater to the very effective low temp fancoil system without any water pipes or circulation pump.
  • Easy to adapt to
History
Back Ground

The project starts up with the research to achieve a simplified flooded system with standard components, for to achieve the best heat transfer with the lowest temperature difference and best performance for the boiling and condensing of refrigerants.


Nano-particles,  enhanced surface that is covered under oil-film, experimentation of superheat expansion valve systems with huge warranty and insurance costs is not the  factors with same potential compared with: Increased mass-flow , refrigerant mixture towards 30/70% mixture and construction of a new system without any superheat in evaporator and without need of a high-pressure-tank .


The project

Tests starts up with control device equipped with thermostatic valve as servo valve for float-valve control system,  this solution was unpractical  unstable and without the  possibility to use of condensate sub-cooler direct after the condenser.


The first tests began with signal-flow from float valve to control a TXV valve.

Discovery of a new exact signal strategy that is based upon the phase-transformation from liquid to gas-phase led forward to two  pioneer-patent based upon the unique new control-signal.


Successful field tests starts up with heat-pump with well-drained condenser and 4-way valve without superheated evaporator. The first step of development towards "no need of negativ superheat in evaporator "was completed . Step two was to increase mass flow and also achieve better mixture towards 30/70 % for maximising heat transfer between refrigerant and surface and remove all the dry evaporator-systems disadvantages with totally unnecessary and huge effectivity and temperatur-losses for a really effective evaporation of refrigerant.

R&D of  ejector-pump starts up together with sub-cooled condensate system and accumulator-heat-exchanger  for maximum pump-circulation-system-performance and a effective oil return system.

Bubble Expansion Valve BXV Company starts up and name protection BXV® is granted.


Public recognitions:
April 2006-IET* Finalist in London
October 2006 “Power Energy”.
November 2006 ASERCOM** Award “Energy efficiency” IKK in Nurnberg   "The best innovative energy efficiency for  improvement of refrigeration/ air conditioning, a new concept"
Research and construction to adapt equipment to the industry, “couplings adaptors”. first tests with cast armatures  foundry in November 07.
Test with ejector-pump geometry with different evaporators and further research for optimum combinations for the automotive and the commercial sector. -
Final-member in the competition "Swedish Environmental innovation "
Finalist in create price “SKAPA” by the inventor Alfred Nobel Foundation 2008   

Final report 2010 July after KTH tests and analyses proves 9,5-11,5 better energy-efficiancy for BXV system compared with standard-system dry evaporator even when same compressor and same heat-exchangers is used.
http://www.effsys2.se/Publicerade%20dokument/P18/Ejektor_rapport_v13.pdf
EFFSY2 is a Swedish development programs for energy efficiency of refrigerators and heat pumps, the goal is: Through
The Automotive Guys
Interesting readings

The test results at KTH in July 2009 showed that the mean heat-transfer coefficient for the BXV system increased with 245 % compared with standard TEX dry evaporator-system.


Many investigations have been carried out concerning the difference in COP between use of  dry-evaporator system and flooded evaporator systems.

Here is some of them.

Boiling Heat Transfer in VCompact Heat Exchangers   T.N. TRAN, M.W. WAMBSGANSS, AND D.M. FRANCE1 1994 San Fransisco (Forced convective boiling mass quality and mass flux)

Flow boiling heat transfer coefficient by Raja Balakrishnan, Mohan Lal Dhasan 2008 page 41 the influence of Vapor quality for the HTC heat transfer coefficcient W/m2K . Liquid subcooling condenser area HTC value compared with condensating values.

The effect of void fraction correlation and heatf