Central air conditioning system is now a standard in modern building, huge energy is consumed to create a comfortable indoor environment, Data indicated that about 30% of the nation power consumption is on building HVAC system, in which about 50-70% are spent in the central plant, and continuously increase,Therefore HVAC central plant become the focal point of energy saving, High Performance Plant Room (HPP) is the major solution in the coming future.

1.   What is High Performance Plant Room (HPP)?

1. What is the benchmark

   The most effective measuring parameter to define a HVAC central plant is the Energy Efficient Ratio (EER),

   EER = Total annual cooling capacity created (KwH)/Total annual power consumption (KwH) of the same plant room, if EER≥ 5.0 is classified as High Performance Plant room.

   
   

2. HVAC power consumption

   HVAC is the major power consumed system in building, survey shows that about 60-70% building consumed power are on HVAC system. There is no doubt building a HPP optimizing the power distribution of chiller, water pumps and cooling tower to the best possible overall performance underpinning energy saving. To understand power distribution refer to Fig. 03 below.

   
   

3. ExistingEER in different countries

   (China Building Energy Saving Study Report 2018) indicated that the contemporary EER of some HVAC plant rooms under operation in Guangdong province are 2.5 - 3.0 , some are even lower than 1.5.

   ASHRAE 2007 Annual report indicated that from the investigation in the pass 5 years, 90% of operating HVAC systems in USA, EER are 2.9 - 3.5.

   The investigation report By Singapore National University, from 28 LEED certified green buildings (before 2008), EER are 2.7 - 3.9.

   
   

4. HPP standard in different countries

   There are different definition and standard of HPP from different countries.

   The following is ASHRAE standard in USA

   
   

   

   Singapore HPP standard

PRC Guangdong province standard DBJ/T15-129-2017, implement from 1 Apr 2018.

To compare normal plant room and High Performance Plant Room:

2.   HPP Energy Saving Analysis

The following year round comparison is based on a 200,000.00㎡ office building development, calculated peak cooling capacity 3,800RT, with a special electric price of   0.68RMB/KwH.

Power saving by HPP:

Energy consumption of pipe fittings:

This calculation is based on a 1,000RT water chiller, the energy consumption of common fittings are:

HVAC High Performance Plant Room could be achieved by using normal standard equipment, it is not necessary using high cost non-standard equipment or latest technology to complete the task, the core idea is to implement the EER concept all the way from conceptual design to project completion and the operation in the later stage without deviate from the targeted EER, doing the correct work in each stage, this could easily be done by a dedicated professional team to look after the project holistically, developer can enjoy a reasonable investment return.

China-Team adopts Standard High Performance Plant Room concept, which use normal standard equipment and normal operation condition design to guarantee EER ≧5.0,   is the most economic HPP in the industry, advantage are:

• Low in technical risk

  Use standard equipment,standard HVAC operation condition(not affecting terminal equipment), easy for installation and maintenance;

• Low in procurement risk

  Most equipment manufacturer product can be used and may come to bid;

• Reasonable investment cost

  Standard equipment at normal supply cost;

• Reasonable and controllable installation period

  Normal equipment normal manufacturing period, normal installation technique;

  Normal installation time;

• Easy maintenance

  Reasonable maintenance cost for standard equipment, simple spare parts supply;
  

• Low in investment cost

  Very short pay back period(within 1 year in southern China area)

China-Team HPP group key staffs：