However, the likely maximum refrigerant pipe length between the condenser and furthest evaporator units could be roughly represented by the dimensions of the office building as shown below in figure.
Figure 2 Office building dimensions for the maximum potential VRF system pipework
According to the measurements, the maximum pipe length encountered would be approximately 6 + 18 + 54.5 = 78.5m. Thus, the size of the building where VRF may be installed is sufficiently small and any possible system inadequacy may be avoided. However, before selecting an exact VRF system the compliance with manufacturer data and the office building would be checked in order to make sure the longest path of refrigerant pipe is sufficiently short.
In conclusion, the VRF disadvantage in term of limited pipe lengths should not be a problem for the AC system design in the building located in Singapore. 1.2.2.2 VRF Conclusion The key strengths and weaknesses were identified for the VRF systems. Those are the minimum space requirement, sensible control of building zones and good energy efficiency. However, the key disadvantages are that the system only provides cooling/heating and separate ventilation system would be required. Thus, an air conditioning provided by VRF 11
