What is it?
Next generation rooftop units use high-efficiency part-load cooling systems to deliver energy savings. The units are designed to operate most efficiently at loads below their peak design conditions. Because most equipment operates at part load for a majority of their operating periods, this can lead to significant energy savings.
How does it work?
These units work by using variable speed scroll compressors to allow for very efficient part load operation. While these units will operate at a similar efficiency at their peak capacity compared to a standard unit, these units shine in part load situations due to their ability to efficiently modulate downwards.
What are the most appropriate applications?
Any applications where rooftop units would traditionally be located can benefit. However, areas with large cooling loads and varying cooling needs will reap the greatest benefits from the technology. For example, hospitals, office buildings, and industrial plants would all benefit from the technology, whereas a datacenter would receive less benefit.
What are the savings?
Savings will depend on cooling needs. As yearly cooling demand decreases, the benefit from these units will decrease. However, in most climates, the savings will approach 45% over a conventional rooftop unit.
What are the non-energy benefits?
These units will be nearly identical to the owner as compared to a typical rooftop unit. One non-energy benefit is that owners can now get efficiencies more comparable to high efficiency central chilling systems with smaller, easier to obtain equipment.
What is the cost?
Costs for these units are not available at this stage in their development. The research has proven them viable, but they are not available on the market yet. However, costs should not be significantly greater than existing technology because the increase in efficiency is accomplished using equipment commonly found today.
What is the status/availability of the technology?
This technology is still being developed and is not yet being mass manufactured.
What kinds of incentives/programs are available?
Right now, this technology would typically be evaluated under Custom Rebate programs. Incentives will vary depending on customer specifics.