Pure Thermal’s dual source heat pump range is designed to deliver high output temperatures, with models capable of reaching up to 120°C. Available in capacities from 30kW to 3000kW, these systems provide industrial and commercial heating solutions that meet the demands of process heating, district heating, and high-temperature water applications. One of the key advantages of Pure Thermal’s dual source technology is its ability to operate based on a source supply hierarchy. This means the system will always prioritise the highest available temperature for heat extraction, optimising efficiency and reducing electricity consumption. For example, if a chilled water return system provides a 14°C flow during certain periods, the heat pump will select this source over lower-temperature ambient air, ensuring maximum energy efficiency and cost-effectiveness.
For medium-capacity applications, Pure Thermal offers single-stage Monobloc systems, capable of delivering output temperatures of up to 70°C without requiring a cascade or two-stage configuration. For larger installations, the Pure Thermal PLUS SO System provides a two-stage dual source heat pump, integrating single-system control and operation to streamline efficiency in large-scale heating applications.
Pure Thermal’s dual source heat pumps are designed to provide significant cost and carbon savings by utilising waste heat and multiple heat sources. Unlike traditional systems that rely on a single heat source, dual source technology allows businesses to recover and repurpose thermal energy that would otherwise be lost.
These systems are particularly beneficial in industries where cooling and heating demands fluctuate, as they can seamlessly switch between available energy sources to maintain optimal performance. By integrating waste heat from cooling processes, businesses can generate zero-cost, zero-carbon hot water, reducing their reliance on fossil fuels and lowering operating expenses.
With the ability to operate from both air and water sources, these heat pumps can be configured to suit site-specific conditions, making them suitable for industrial processing, commercial HVAC systems, and district heating networks. Their modular and scalable design allows for flexible integration, ensuring businesses can expand their heating capacity as needed without compromising efficiency.
Waste heat from manufacturing processes or cooling systems provides an opportunity to utilise a Dual Source Heat Pump. For example, a hospital cooling system will produce waste heat 365 days per year but with significantly higher waste heat produced over the summer and high ambient periods. However, the waste heat (from the non-ambient related cooling demand) over the winter period can provide a fantastic source load for the heat pump at a higher temperature than the external ambient.
How?
Surely a heat pump is separate from the cooling system especially where retrofit carbon reduction projects are concerned? That does not have to be the case as a Dual Source Heat Pump can gain real efficiency benefits by using the second time use waste heat from cooling as its source.
Why?
Because the chilled water return temperature is at a higher temperature than the external temperature that the air source would normally operate in, the dual source heat pump simply takes heat from the chilled water return and uses this heat as its source.
Hence the dual source heat pump delivers higher efficiency and greater capacity than when in air source mode but also displaces the input power to the incumbent chiller as the dual source heat pump also provides cooling.
Do the loads have to be balanced?
No, the waste heat can be sporadic or varying, the dual source heat pump accumulation system enables the waste heat load to be accumulated in order to provide the most efficient operating conditions for the heat pump. The dual source heat pump seamlessly switches from air source to waste heat source in line with the application requirements.
Does a dual source heat pump only work with chilled water systems?
No, the dual source heat pump can operate with any waste heat source be that air or liquid, examples are:
Which sectors can benefit?
Any application that creates waste heat which is rejected to the atmosphere at the same time heating or hot water is required:
Any facility that is decarbonising needs to consider recycling waste heat as the first priority, if there is no waste heat then the application is air source only. But waste heat dual source heat pumps will deliver much lower heat pump operating costs than either air or ground/water source heat pump systems. Contact the Pure Thermal applications team to discuss how a dual source heat pump could deliver the highest efficiency levels at your facility.
Existing or new facilities can now benefit from significantly reduced energy costs by incorporating a Pure Thermal Dual Source Heat Pump system into their installation. In basic terms this provides simultaneous cooling and hot water or heating outputs using significantly less energy than would normally be required. For example, if an application requires 100kW of cooling and also requires 100kW of energy to produce stored hot water i.e. a total of 200kW, the Pure Thermal Dual Source CO2 heat pump will satisfy both requirements but will only require the input power to satisfy 100kW of cooling i.e. circa 30kW.
This is achieved by an innovative CO2 refrigeration system that combines both cooling and heating outputs; this system recycles the maximum amount of available waste energy to meet the required demand.
Key Features
Key Features
*Efficiency will be dependent on individual project conditions and requirements, an individual illustration can be provided with regard to capital cost, operational costs and return on capital, based on actual site-specific information.