Instantaneous Hot Water : Heat Miser Case Studies
Now more than ever, clean and safe on-demand hot water is needed. This includes applications such as hospitals, food & beverage facilities, schools & universities, hotels, apartment buildings, and more. Typically, this need calls for a large hot water storage tank. However, these storage tanks come with a range of issues such as excessive floor space, stagnating water, danger of Legionella growth, and significant radiant heat loss.
“An estimated 8,000 – 10,000 people are hospitalized with Legionnaires’ disease each year in the United States. The key to preventing infection is keeping Legionella bacteria out of your water. The Watson McDaniel Heat Miser flash heats the water to a high temperature to kill pneumophila.”
Watson McDaniel Heat Misers provide hot water right when it’s needed with minimal waste. These systems require less energy and maintenance, meaning lower overall costs. They are designed to fit through a standard 36” doorway for easy installation. Their small footprint (typically 14 ft2) allows for multiple units if expansions occur. Stainless steel waterside components virtually eliminate any corrosion. The following case studies give real life examples of the benefits of these Heat Misers.
Instantaneous Hot Water in a Hospital
A hospital was relying on two aging domestic hot water storage systems which were used to supply critical hot water to the facility. The units needed continuous repairs. Both were losing condensate due to regular tube bundle failures. This was because of poor-quality steam supply and improper condensate return.
Watson McDaniel provided energy-efficient instantaneous hot water Heat Misers to replace the existing storage systems. They also developed an overall solution for system improvement. This included proper steam supply conditioning and effective condensate drainage with a pump-trap.
In addition to reducing energy costs, the reduced footprint of Heat Miser systems allowed space for two systems. Both systems were able to handle the full water capacity load of the hospital, providing 100% redundancy. The removal of the inefficient hot water storage systems greatly reduced maintenance costs. It also increased the valuable energy from the condensate now being returned to the boiler. The estimated annual savings totaled to over $15,000 per year.
Hot Water Storage in a Textile Factory
A textile facility needed replacing a dilapidated hot water storage system used by the staff restaurant kitchen area. The old system was no longer able to maintain temperature control of the water. It was continually overheating the water to unsafe levels and was a risk for personal use. The high limit safety relief device constantly dumped the hot water to drain. This led to a high amount of wasted energy use and natural resources.
The Watson McDaniel solution was to install a closed loop instantaneous steam to hot water Heat Miser package. This design removed the need for inefficient hot water storage tanks. Instead, the Heat Misers provided fast, accurate temperature control needed for domestic hot water applications. The package also came provided with added safety features to eliminate overshoot and spikes in hot water temperature. The main priority was keeping the end users safe.
The installation provided the added benefit of reducing the energy consumption and water consumption of the old unit. The annual savings totaled over an estimated $17,000 per year.
Watson McDaniel Heat Misers
Getting instantaneous hot water requires quick response and precise control. The components of the Watson McDaniel Heat Miser were designed to exceed the demands of instantaneous heating water and have proven reliability. The standard Heat Miser is offered with an ultra-efficient Plate & Frame Heat Exchanger with steam-rated EPDM gaskets and single wall 316 SS plates. Optional double wall and shell & tube designs also available.
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