As decarbonization targets draw nearer, more standards, regulations and knowledge are needed regarding future hot water systems and the options available for the commercial building stock to enable the UK to meet Net Zero by 2050. Since every building has differing hot water requirements, space availability and financial budgets, a vast range of hot water systems need to be available to meet the needs of the government, end user customers and consultants.

This paper and CPD reviews and analyses the suitability of integrating solar thermal collectors and high temperature heat pumps using a parallel dual storage configuration setup. Based on an archetype hotels hot water requirement, this novel system is sized, designed, and compared against three alternative systems currently available as commercial solutions. Each system is compared based on key metrics important to stakeholders, including the capital expenditure, operating expenditure, carbon production, primary energy, and the system efficiency over a 20-year lifecycle.

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