Refrigeration is everywhere. The food industry and the related cold chain is highly dependent on refrigeration, but it is also a necessity for other industry sectors, including pharmaceuticals, petrochemicals and other chemicals.
The refrigeration industry is facing some daunting challenges. Refrigeration consumes a significant proportion of global electricity consumption. As the world grapples with the risks of climate change, there is intense pressure on the industry to improve efficiencies and reduce energy usage. At the same time, ‘F-gas’ regulations are driving a transition away from refrigerants with high global warming potential (GWP) – giving rise to challenges around flammability, system pressure and toxicity associated with the replacement fluids. Meanwhile, there is an opportunity arising from the global rise in average incomes and the resulting increases in demand for refrigeration. Increased use of refrigeration also has the potential to improve health outcomes – particularly in developing countries.
Two-phase heat exchangers – whether fin and tube or plate heat exchanges – are core components of almost all refrigeration systems. OnS coatings dramatically improve the performance of these heat exchangers. This enables significant reductions in size, weight and cost, as well valuable improvements in the overall energy efficiency of refrigerations systems.
Contact OnS today to find out more about our coating technologies and how they can reduce the cost of your refrigeration systems!
Steady gains in GDP per capita is giving rise to a rapid expansion of the ‘global middle class’. The world is set for unprecedented growth in the demand for air conditioning cooling – fuelled by increases in temperature resulting from global warming.
Air conditioning represents a significant and increasing proportion of the world’s energy consumption. There is a clear risk of a dangerous feedback loop: warmer temperatures result in more air conditioning; more air conditioning results in warmer temperatures. While grasping the opportunity created by growing demands, the air conditioning industry must respond to this emerging “cooling crisis”. It must do this at a time when ‘F-gas’ regulations are driving a transition away from refrigerants with high global warming potential, creating challenges with refrigerant charge and flammability.
Whether they are fin and tube, shell and tube or brazed plate type, air conditioning systems are all based on two-phase heat exchange. By enhancing two-phase heat transfer, OnS coatings dramatically improve the performance of evaporative heat exchangers. Our coatings result in significant improvements in the overall capacity and energy efficiency of air conditioning systems. Increasing capacity will extend the range and market reach of product lines. Alternatively, significant reductions in the size, weight and cost can be achieved without compromising capacity.
If you are interested in finding out more about OnS coating technologies and how they reduce the market reach, capex and opex of your air conditioning systems, then contact us today!
Heat pumps use the vapour compression cycle to provide thermal energy by absorbing heat from a cold space and releasing it to a warmer one. The efficiency of a gas boiler or furnace can be as low as 80%, but will always be less than 100%. By contrast, an air-source heat pump can produce around 4kW of thermal energy for every 1kW of electrical energy consumed. This ratio of 4 – referred to as the coefficient of performance – is equivalent to an “efficiency” of 400%. Ground and water source heat pumps can achieve coefficients of performance of 5 or more.
Scaling up the use of heat pumps is considered a critical element in the battle to curb climate-warming emissions. Heat pumps represent an ideal mechanism to leverage up the energy generated from renewable sources, such as wind and solar.
In heat pumps, brazed plate heat exchangers and fin and tube evaporators are used to absorb heat from the source. For air source heat pumps in particular, the minimising size of the external air-side evaporator unit is key – particularly in domestic applications. OnS coatings dramatically improve the performance of evaporators by enhancing two-phase heat transfer from the surfaces of heat exchangers. This improvement translates directly into efficiency gains for the heat pump system. These gains lower operational costs, tipping the balance in favour of heat pumps rather than traditional fossil fuel systems, such as boilers. Significant reductions in the size, weight and cost can be achieved without compromising capacity.
Contact OnS today to find out more about our coating technologies and how they can reduce the size, weight and cost of your heat pump systems – as well as improving the energy efficiency!
Against the backdrop of the global climate emergency, it is frustrating that waste heat from many industrial systems and processes is simply released into the atmosphere. Waste heat recovery is the process of reusing thermal energy that would otherwise be disposed of or simply dissipated into the environment. By recovering waste heat, plants can increase energy efficiency, while simultaneously reducing CO2 emissions and utility costs.
The use of low grade energy sources for generating power has been used in geothermal and ocean thermal energy systems. The power is generated by the evaporation of the working fluid by a waste stream – at only a slightly higher temperature – via the Organic Rankine Cycle. This small difference in temperature necessitates the need for large and efficient heat exchangers to make the systems cost effective.
The use of nanoFLUX® can reduce the superheat to less than 2oC, making the cost of installation and pay-back period of these systems much more viable.
Contact OnS today to find out more about our coating technologies and how they can help your facilities achieve net zero by improving the performance and pay back of your waste heat recovery systems!
There continues to be an inexorable rise in the power densities of semiconductor devices used in power electronics, defence and high-performance computing applications. Heat fluxes commonly exceed 100 W/cm2 with the potential to rise beyond 1kW/cm2. For the latest generations of microprocessors, the thermal management requirements have exceeded the limits of air cooling. Liquid cooling techniques are recognised as the only viable approach for thermal management of systems with sustained thermal loads at these levels.
By exploiting the latent heat of vaporisation, two-phase systems provide cooling capacities well in excess of single-phase liquid cooling systems. Yet for the most power-dense electronic devices, even this is not enough.
Innovative OnS coating technology dramatically increases heat transfer within two-phase liquid cooling systems. Our nanoFLUX coating technology is the solution for high-performance and efficient cooling of ultra-high power density electronic devices. Compatible with copper, aluminium, ceramics, silicon and other semiconductors, nanoFLUX can be applied to surfaces containing microscale surface features, including microchannel cold plates and micro-evaporators.
OnS nanoFLUX® technology:
Contact OnS today to find out more about our coating technologies and how they can improve the performance of your two-phase cooling systems, reduce SWaP-C and improve the reliability and performance of high-power electronic systems!