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Division 1 THERMAL EFFICIENCY OF A NON-RESIDENTIAL HEAT RECOVERY SYSTEM

United Kingdom

Original text. Later amendments are not shown.

The thermal efficiency of a non-residential heat recovery system is defined as

η t_nrvu = t 2 ″ − t 2 ′ ∕ t 1 ′ − t 2 ′

where:

  • ηt is the thermal efficiency of the HRS [-];

  • t2″ is temperature of the supply air leaving the HRS and entering the room [°C];

  • t2′ is temperature of the outside air [°C];

  • t1′ is temperature of the exhaust air, leaving the room and entering the HRS [°C].