DOLPHIN heating / steam coils are constructed for suitable steam or hot fluid’s high pressures. Standard configurations, as well as special arrangements are available.

Heating coils typically feature steam/ hot fluid supply header and condensed return headers and connections on opposite sides of the coil. Hot fluid supply connections are typically placed centrally on the supply header, with the condensed return connections typically placed at the bottom of the return header providing self-draining.
Our Heating coils are specifically designed with condensation management system in mind. Tube and connection sizes are combined to limit condensed retention in the coil.

Carefully sized orifices are located in each of the core tube entrances into the header. Dual-tube coils utilize a smaller inner tube, with precisely spaced, directional, orifice-type perforations.
This helps to direct condensed flow to the return header. The steam supply, condensed-return headers, and connections may be fabricated in 'same-end' or 'opposite-end' orientation.

With a complete range of cold water and fluid coils, our range is capable of utilizing water, glycol solutions, ground water, and other fluids. Standard chilled water cooling and hot water heating coils may also be manufactured to client specifications.

Booster coils built with either flanged or slip-and-drive casings are also available. These coils are commonly duct-mounted or used within VAV units for low-capacity reheat applications. Booster coils are constructed without headers, in either one or two circuit configurations.

Fluid coolers for oil, after cooling, and special purpose cooling can be designed to customer’s exact project requirements. Blast coolers, are a fast and efficient way of rejecting heat from process fluids before further cooling. These cooling coils are used in various engineering industrial, marine, hotel and commercial applications. Our cooling coils are widely used for remote type power generator engine cooling systems as well.

DOLPHIN has the facility to manufacture cold / heat recovery (run-around) coils as they are an effective way to reclaim waste or process heat / cold that would otherwise be lost, providing valuable operating cost savings. The special types of inner grooved or capillary tubes are used for effective condensing and evaporative processes.

DOLPHIN produces a wide variety of water and fluid coils for numerous HVAC & R applications and Industrial purposes. We custom design coils for any fluid including refrigerants, oils, antifreeze, thermal oils and other solutions to meet customers unique conditions.

While recommending a coil design we consider several factors. We work with the customers to identify the best material combinations to suite their environmental and project needs.

All our coils design selections are optimized using a specialist AHRI- certified (American - Air Conditioning, Heating & Refrigeration Institute) software package. This ensures our customers receive optimum performance for size characteristics, helping to deliver cost effective solutions.
With our wide ranges of fin patterns, tube sizes & patterns, coils can either be uniquely designed to maximize performance at minimal cost or designed as a direct replacement unit without affecting existing client designs.

Our products are suitable for a complete range of modern air conditioning equipments and Industrial applications which includes,

• Air Handling Units (AHU)
• Fan Coil Units (FCU)
• Air-cooled Chillers
• Heat Recovery Systems ( Heat Pipe / Run-around coils)
• Constant / Variable Air Volume Terminal Units
• Air-cooled Condensers
• Duct-mounted heating & cooling systems.

DOLPHIN offers a number of Protective Coatings to enhance the life of its coils including Condensers & Evaporators which includes,

• Thermoguard
• Heresite

These coatings have a High Durability and have Protective Factors to deal with the severe Gulf Region Atmospheric changes, on shore as well as offshore. Each of these coatings carries a warranty of 2-7 years.
Air conditioning can consume 60% of the electricity in an average office building, if coils are not protected from corrosive elements, operating costs will accumulate rapidly.

Thermoguard (T.G. Coating) offers a wide range of product applications to increase the corrosion resistance of HVAC & R units and other coils. The capacity of a heat exchanger originates from the absorption or rejection of heat from the aluminum / copper finned surfaces.
The coolant travels through the copper or other tubes transporting the heat throughout the system. When corrosion is present, it deteriorates the finned surface area and/or the bonding between aluminium fins and copper tubes (known as galvanic corrosion), therefore the capacity of the heat exchanger can deterioate substantially.

Some advantages of T.G coatings are,

• Less Dirt Adhesion & High corrosion resistance
• No microbial, Aluminum or galvanic Corrosion & No fungi growth
• Minimum influence on K-Value & Temp resistance –30⁰ C to 180⁰ C
• Droplets shed off more easily & so Less frequent cleaning
• Non poisonous micro biocide
• Minimum influence on Δ P
• Prevents bad odors & growth of mold

Dolphin has designed and manufactured different kinds of Heat Exchangers for over 30 years. We have now introduced complete aluminum Micro-Channel Heat Exchangers into our product range. We are dedicated to the design and manufacturing of Micro-Channel Heat Exchangers used in the HVAC/R and Industrial applications. This Technology provides a way to improve thermal performance, reduce refrigerant charge and improve corrosion resistance. Parallel flow aluminum tubes are brazed to aluminum fins under Controlled Atmosphere Brazing process

• Converting conventional round tube plate fin technology to Micro-Channel reduces the tube thickness and results lower air side pressure drop, and saves energy as less power is needed to force the cooling air through the core.
• Reduced internal diameter of the tube leads to lower refrigerant charge which helps to decrease the amount of refrigerants.
• The single metal concept eliminates the electrochemical potential difference of the base materials which has reduced the life time of the conventional RTPF- products.
• The Micro-Channels maximize refrigerant side heat transfer via multiple tiny refrigerant channels which contribute to improved heat transfer by more turbulentic instead of laminar flow and by increased primary surface area.
• Unlike in mechanically bonded RTPF-technology the metallurgical fin-tube bond resulting from brazing operations maximizes the surface contact and increases the heat transfer surface area.
• The lower density and LME price of Aluminum result to less weight per heat exchanger with the lower cost than the traditional coils.

Heat Recovery Heat Pipes: The Future of HVAC Comfort and Efficiency

HVAC systems are evolving, with companies pushing the boundaries of comfort and efficiency to new heights. Enter Dolphin's innovative Heat Recovery Heat Pipe solutions - the pinnacle of these efforts. By seamlessly integrating the benefits of energy savings with enhanced indoor air quality, Dolphin has introduced a game-changer in the HVAC industry.

Heat Recovery Heat Pipes (HRHPs) are a type of passive heat exchanger. They allow for the transfer of heat from the exhaust air stream to the fresh intake air in HVAC systems, without the two air streams ever coming into direct contact. This results in reduced energy consumption, as the HVAC system requires less energy to condition the incoming air, thereby providing both energy savings and comfort enhancement.

What sets Dolphin's solution apart from the rest? Here's why professionals and homeowners alike are raving about the ‘Dolphin Advantage’:

• Plug and Play Technology: Gone are the days of complicated installations and setups. Dolphin's HRHPs are designed to be hassle-free with 'plug and play' technology. Just integrate it with your existing HVAC setup, and it's ready to go.
• Moisture Reduction: Moisture in the indoor environment can lead to a myriad of issues, including mold growth and respiratory complications. Dolphin's Heat Pipes excel in moisture reduction, ensuring a fresher indoor environment.
• Enhanced Air Quality: As the world becomes increasingly urbanized, the quality of indoor air becomes a significant concern, especially in public spaces. Dolphin's Heat Pipes stand out by ensuring enhanced air quality in places like hospitals, schools, malls, hotels, and hypermarkets.