A development project to design and build up one heat pump that is able to meet the requirements informed in the paragraph ‘II.2.4) Description of the procurement’.

The designed heat pump unit has to meet following requirements:

— refrigerant R1234ze,

— as high heating capacity as possible,

— maximum dimensions of the unit 20 m x 10 m x 8 m (length x width x height) approximately,

— maximum heating outlet temperature ≥ 95 ºC,

— sewage water to evaporator approved compressor type: turbo compressor.

The heat pump unit shall be designed so that:

(a) inlet temperature of sewage water to evaporator varies between + 6-20 ºC;

(b) inlet temperature of district heating water to condenser varies between + 37-60 ºC.

The above mentioned temperatures will be specified in the final request for tender. The tenderer candidate which offers to take part in this development project as the designer shall also be the manufacturer of the heat pump. The heat pump unit as a whole with all of the parts and appliances must meet the obligatory EU directives, and their manufacturing shall follow EU-standards. The manufacturer shall present CE acceptance with declaration of conformity for the heat pump unit they deliver. The designing work will be done between September and December 2019. As an outcome of this design work the the tenderer candidate shall present binding final tender for supply of the designed heat pump unit. The final tender shall be presented by January 2020. According to the current schedule the purchaser will decide on pursuance of the investment by March 2020.

Preliminary schedule for execution:

— heat pump delivered to installation site 4/2022,

— heat pump commissioned 11/2022,

— heat pump’s test run done and unit ready for operation 4/2023,

— heat pump’s guaranteed values measured 5/2023.

The design and production of the heat pump unit in the scope of this supply is one technical entity which cannot be divided into lots.