Coefficient of Performance (COP)
The coefficient of performance (COP) is a key metric used to evaluate the energy efficiency of thermal systems, particularly heat pumps. It represents the ratio of useful heating or cooling output to the amount of energy input required to achieve it.
In industrial settings, understanding and optimizing COP is critical for reducing steam costs. Systems with a high coefficient of performance, such as Skyven Arcturus, deliver steam using a fraction of the electricity that boilers or lower-COP heat pumps require.
What Is the Coefficient of Performance?
COP Definition
At its core, the coefficient of performance measures how effectively a system converts energy input into useful thermal output.
Arcturus can have a COP greater than 1 because it draws on two energy inputs to generate steam: electricity and low-grade heat recovered from industrial processes. It captures that recovered heat, then uses electricity to upgrade it to boiler-quality steam. Because that recovered heat supplies part of the energy in the steam, Arcturus needs less electricity than an electric boiler to produce the same output.
How Is COP Calculated?
COP Formula and Variables
Coefficient of performance is calculated by dividing the delivered thermal energy of a system by the energy the system consumes.
For instance, if a heat pump delivers 100 kW of steam while consuming 30 kW of electricity, the COP is:
COP = 100 / 30 = 3.33
This means the system delivers 3.33 times the amount of energy it consumes—an indication of high efficiency.
Factors Influencing COP
The primary driver of COP for a given site is temperature lift: the gap between heat source temperature and the steam delivery temperature and pressure required. A smaller lift means a higher theoretical ceiling on COP, while how close a system gets to that ceiling depends on its design. A facility with hotter recoverable heat, or one that needs lower-pressure steam, will see a higher COP than one with a larger lift between the two.
Explore how COP changes with heat source temperature and steam pressure to see this relationship across real operating conditions for an Arcturus system.
Importance of COP in Industrial Heat Recovery
In manufacturing, a higher COP directly translates to lower energy costs and less exposure to carbon pricing mechanisms like the EU Emissions Trading System (ETS). Technologies like mechanical vapor recompression (MVR) steam-generating heat pumps (SGHP) have high coefficients of performance because they reclaim waste heat and upcycle it to usable process steam.
Industries such as food and beverage, pulp and paper, and chemicals benefit immensely, as energy-intensive steam systems can account for a large portion of operating costs. Optimizing COP in these processes drives direct energy savings, with reduced carbon pricing exposure as a secondary benefit.
Skyven’s Approach to COP Optimization
Skyven’s Arcturus line of steam-generating heat pumps is engineered to reach high COPs across a broad range of industrial operating conditions.
As a mechanical vapor recompression steam-generating heat pump, Arcturus uses multistage turbofan compression and water as a zero-emissions refrigerant, delivering COPs ranging from 2.1 to over 8, depending on the facility’s heat source temperature, steam demand, and operating conditions.
Skyven’s Galileo modeling tool estimates site-specific COP and associated economic benefits from a facility’s heat source temperature and steam delivery conditions. This rapid estimate is then further refined throughout Skyven’s stage-gate engineering process.
Frequently Asked Questions About Coefficient of Performance (COP)
What does a higher COP indicate?
A higher COP means a system delivers more thermal energy per unit of input energy and is more efficient.
How does COP affect energy costs?
Systems with higher COPs need less electricity to deliver the same amount of heat, significantly lowering operating expenses.
Can COP be greater than 1?
Yes. Combustion boilers and standard electric boilers top out near a COP of 1. Arcturus exceeds that because part of its delivered heat comes from heat recovered from industrial processes, not electricity alone.
How does Skyven help improve COP?
Arcturus reaches higher COPs at higher temperature lifts than typical industrial heat pumps because it compresses water directly, in discrete stages, keeping steam close to saturation and limiting inefficiencies at high temperatures.
Skyven’s Galileo tool assesses site thermodynamic conditions to provide a rapid estimate for COP, which is further refined through Skyven’s engineering process.
Is COP important for sustainability goals?
Yes. A higher COP means less electricity per unit of steam, which lowers operating costs and reduces Scope 1 emissions and exposure to carbon pricing, supporting sustainability goals.
Can COP be used to compare different systems?
Yes. Because COP and boiler efficiency both express output over input energy, they can be compared directly, letting a facility weigh an SGHP like Arcturus against its existing boiler on the same basis.