Upon fully investigating various mechanically systems to improve the performance of the building. This final report proposes and explains in detail the application of a hybrid heat pump system. The hybrid heat Pump system is design as a regular heat pump in the cooling mode and a fan coil unit in the  heating mode.

 

During the heating season the system would turn of the compressor and use a hydronic heating coil located within unit to provide heating . This system will consist of a 3 way valve to divert the direction of the water within the loop into the hydonic coil at against the compressor.

This method was realized after analysis the heating and cooling degree days as it affects the climate and temperature profile of the building.

During this mode of operation the heat pump is designed to be in a fuel switching mode where the boiler does all of the heating with natural gas. Instead of with electricity. The heating mode of this process becomes more efficient because the water loop temperature is higher hence reducing overall energy. 

 

A Plumbing and water management breath was analyzed in the building. New Plumbing fixtures with low flow requirements were replaced in the building to reduce the overall water usage in the building as well as reduce piping system in the building. A Shell and Tube Heat exchange is implement in this design to reject the heat from the condensate water going into the cooling tower. This is used to pre-heat the water and reduce the work done by the water heaters assigned for domestic heating as well as reduce the amount of heat that has to be rejected into the cooling tower. 

 

Acoustics was a major concern for this project as having a distributed heat pump within the building would cause some noise within he building.

A speech sensitive room was analysed, and alternative designs were evaluated to best meet the required design target for the room as per acoustic codes.