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AAAT recommends the use of Heater type humidifiers in all Australian capitals except Adelaide. Electrode humidifiers operate outside recommended parameters waste substantial energy and have an operational shortfall. See evidence as follows.

Sydney water is considered “soft” with a water hardness level of approximately 57 milligrams per litre (mg/L).

Water hardness refers to the levels of CaCO3 in the water. If the concentration of minerals is less than 60 mg/L,

it is considered soft, and at more than 60 mg/L it is considered hard. Water hardness is also expressed as

Parts per million (ppm), where 1 ppm = 1 mg/L. (Water analysis (sydneywater.com.au))

“Normal” water is typically defined as feed water with conductivity between 200 and 500 μS/cm (microSiemens per centimeter) at 15° C.

The acceptable range of water conductivity for the SLH model is: < 1,250 μS/cm

Australian Water:

Soft < 60

60 < Moderate < 120

Hard > 120

Maximum of 15°dH, = 267.9 ppm

Conversion: 1 PPM = 1.56

μS/cm∴ the electrode humidifier is suitable (year-round) for Adelaide ONLY based on the water conductivity range (outlined below).

The SLE model has an optimal range between

200 – 800 μS/cm, with reduced efficiency from

125 – 200 & 800 – 1,250 μS/cm

The HeaterLine Type (SLH) steam humidifier is designed for use with:

● Tap water with a total hardness of max. 269 ppm
● Demineralized water (min. conductivity 3µS/cm)
● Fully cleaned condensate (min.conductivity 3µS/cm)
● Partially or fully softened water

Therefore, the SLH model (heater type) is most appropriate for all year use around Australia.

Daniel Bosnich, April 17th

DST Dryer Pty Ltd

TA/- Air and Aqua Tech Australia

1300 002 228

www.linkedin.com/in/daniel-bosnich/

Supermarket energy consumption is substantial and the major chains have been looking for reductions closely in the last 20 years.

Walmart incorporated desiccant systems substantially to reduce humidity, condensation, and ice in the refrigeration display cases.

https://www.linkedin.com/feed/update/urn:li:activity:7158615620618526720

Savings include

‣ Reduced the power consumption by 10% of all the cases for every 10% reduction in humidity (Note: efficiency average on a typical mixture of case type).

‣ Reduce defrosts to melt the ice (often the cause of poor ice cream quality) 
Avoid strip heaters to stop display condensation.

‣ Reduced electric reheat as conventional air conditioning would over-cool the air to 12C or lower and then reheat sometimes with 200kW of electric heat to get the store below 60%rh to try to avoid ice issues.

Desiccant dehumidifiers avoid this by using waste heat from site refrigeration and onboard compressors to provide free dehumidification capacity to maintain 45%rh in the store around the cases.

DST Dryer has delivered over 100 of these in Australian supermarkets, specifically customized for local building configuration, some are easy to install on the roof, sometimes more challenging like West-HVAC installation in the basement the latest is Sydney installation.

If you have a humidity problem or need to look into energy savings contact DST.

At DST, we’re committed to providing effective humidity control solutions, especially in challenging environments like tropical operating theatres (OTs).

Permanent Installations for Humidity Control:
We specialize in permanent installations conditioning outside air in OTs, both in large multi-OT facilities and individual surgeries.

Case Study: Thursday Island Installation
Recently, near Thursday Island, we encountered a scenario where the OT experienced 16°C temperature and 100% humidity, significantly higher than the required 40-60%rh. This excessive humidity was causing delays in patient care due to room condensation and fogging.

Upon urgent request, DST Dryer swiftly designed and implemented a solution within 2 weeks. We arranged a modified stock Daikin 300l/s precooler to reduce outside air to 15°C dew point. Coupled with a Desiccant dehumidifier, DST model RL060LR, we achieved a -1°C dew point (equivalent to 30%rh at 16°C). This dried air effectively absorbed all infiltration moisture and that from room occupants, maintaining humidity below 60%rh (8.5°C dew point) to prevent condensation on instruments.

Broader Applications in Healthcare:
Desiccant dehumidifiers find application in various healthcare settings, including MRI rooms, sterile stock rooms, birthing wards, and general ward humidity control to mitigate infection risks.

Additional Benefits of DST Solutions:

> Reduced Energy Consumption
> Improved Indoor Air Quality (IAQ) with mold reduction
> Independent Temperature and Relative Humidity Control
> Lower Air-Conditioning Power Requirements
> Reduced Ducting and Plant Size

At DST, we’re not just addressing humidity; we’re enhancing patient care and operational efficiency in healthcare facilities across the tropics.

Testimonials:

– GM, OT contractor company: “Just letting you know that we managed to keep the RH at 28% all night. All I did was exhaust a bit of cold air out, and by adjusting that damper, I was getting full control of humidity levels.”

We are very excited to announce the release of our DF-GUARD monitoring system! Using advanced monitoring technology, DF-Guard offers an efficient and user-friendly experience.

 WHAT IS A DF-GUARD? 
The DF-GUARD is designed specifically for remote guarding of atmospheric absorption dryers. It saves on preventive maintenance, prevents failures and generates data available for analysis.

THE DF-GUARD COLLECTS

ADVANTAGES OF THE DF-GUARD
✅ Reduces maintenance costs and provides insight into operation and energy consumption.
✅ Low investment with great impact, significantly lower costs as comparable units.
✅ Continuously monitoring the operation of the dryer and creates push messages on freely adjustable set points.
✅ Unique due to the two moisture sensors suitable for low dewpoints.
✅ Free choice, management and surveillance in own hand or by D&F Techniek
✅ Easy to install due to clear installation instructions.
✅ The DF-Guard is supplied as ‘plug & play’, power can come from the dryer.

TECHNICAL SPECIFICATIONS
The DF-GUARD is designed to be built into the
dryer but can also be mounted outside.
The sensors are installed in the various
compartments and wired internally to the
transmitter module.

SET UP ALERTS AND NOTIFICATIONS
In addition to the ability to set multiple authorization levels, it is also possible to set actions based on measured values. 

???? https://dstdryer.com.au/
✉️ info@dstdryer.com.au
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DST Dryer exhibiting their latest technology at ARBS for humidity control systems. Daniel and Gordon presenting Dessicant Dehumidifiers for over 8,000 attendees. The units on display are as follows
-Recusorb unit capable of 1% rh or efficiently controlling humidity in large premises, including museums cold stores supermarkets and pharmaceutical. 
Other dehumidifiers on show are 
-Small store unit DC5. 
– newly developed DST RL61 which consumes 10% less energy than other leading brands capable of 11L/h
-patented DST Frigasorb F31 Refrigerated desiccant dehumidifier, 60% less energy than electric element dehumidifiers

DST dehumidifiers can effectively maintain steady RH(relative humidity), preventing condensation and frost formation. Watch how our cold store application installation is 5 times more efficient and effective when installed at the loading Bay Area as opposed to the -20 degree space. 

Spitfire aircraft use Merlin engines, which have similar problems to most engines during standby, where corrosive exhaust gasses effect internal component and then require more frequent expensive maintenance works. Other aircrafts such as Mustangs and Kitty Hawks also use a Merlin engine.

Bernd (Bernie) Heuser Chief Engineer of The Old Aeroplane Company and National Air Museum found, by purging with dry air using DST model DC050 after running the engine, the pollutants are substantially displaced, and remaining compounds are made less corrosive with low humidity air. Otherwise, ambient humidity is contained within the engine and due to the thermal inertia, condensation can even form (see example).

Corrosion typically requires four components to implement the corrosive circuit. These are the anode (the positively charger material), the cathode (the part which corrodes), the electrolyte (typically water or water vapour) and air for completion of the circuit. The elimination of any of these contributions will halt the development of corrosion.

New technologies are used wherever possible to allow our products to utilize energy efficiency control. Our programmable logic control (PLC) systems can increase operating efficiency, lower carbon emissions, and reduce running costs; factors that may be crucial for environmental certification.

PLCs (C2 and C4) are tailored to ensure the highest operating efficiency is achieved for each specific project. PLCs can be used independently, with one of our digital controllers (EH3 & EH4) or interlinked with a building management system (BMS).