Right Sized, Right Temperature Solar Dynamics Hot Water Systems will satisfy 98% of a business’s hot water needs in the temperature range of 120 to 160 degrees F.
The hospitality industry in the Caribbean is the largest user of hot water for guests personal care, kitchen sanitation and hygiene. Guests in the average hotel room consume 40 gallons of hot water per day.
Some of the best known Caribbean hotels – Sandals in St. Lucia, Mango Bay in Barbados, Almond in Barbados and St. Lucia, Spice Isle in Grenada, Coco Palm and Bay Gardens in St Lucia are experiencing the efficiency and benefiting from the savings of energy and money through the Solar Dynamics Hot Water System.
Each hotel can generate a high rate of return, over 45% on the investment in the Solar Dynamics Hot Water System. Each room consumes the equivalent of two barrels of oil per year to heat water. The rate paid for electricity is generally 4.5 times the cost of oil.
Where a boiler is being used for hot water in a hotel or laundry, preheated water by solar is an effective way of reducing your fossil fuel demand.
Sizing recommendations for the hospitality industry
Hot water is one of the two most demanded comforts in the hospitality Industry, the other being air-conditioning.
Solar hot water systems absorb the sun’s heat during the day and store the heated water throughout the 17 hour non-solar period of night and early morning.
Most hot water is consumed in the non –solar period between 6.00 pm and 8.00 am the following morning.
During this period, the heated water used, is replaced by incoming cold water .This cold water being heavier, remains in the lower part of the storage tank.
Adequate volume is therefore required to avoid having to resort to electrical back-up boosting (it is less expensive to adequately size the system than to be frequently using the back-up electrical booster.
The volume found to be right sizing is as follows:
Per guest at maximum occupancy:
15 gallons per person for regular shower heads.
20 gallons per person for rain shower equipment.
20 gallon per person for tub facilities
20 to 25 gallons per person for Jacuzzi facilities.
The recently concluded ENEP study on solar water heater installations in hotels in the Caribbean, included two of the hotels equipped by Solar Dynamics Ltd, Bay Gardens in Saint Lucia, and Turtle Beach in Barbados. They reported a 95 % to 100% satisfaction with the performance of their systems. These systems were sized on the basis of 20 gallons per person and 40 gallons per 2 person room.