Author Ir. Hui Wing On

Since the refrigeration air-conditioning system was invented, academia and industry have continuously tried to propose countermeasures to improve the coefficient of performance(COP) or Energy Efficiency Ratio (EER) of the refrigeration air-conditioning system.
There were tremendous suggestions in improving coefficient of performance and energy efficiency ratio of air-conditioning systems raised out from different people in the industry:reduce system power consumption, improve cooling capacity, enhance heat dissipation capacity, reduce pressure loss in pipelines, reduce temperature and pressure differences between high and low pressure sides start with other aspects. Perhaps there are interdependences and contradictions among various approaches. How to optimize and achieve a highly efficient air conditioning system is a big challenge for developers.

China Team is very aware of the technical solutions for implementing High Performance Chiller Plant Room in advanced countries abroad, and we pays attention to saving of energy consumption of central air conditioning in the world. In the case of no High Performance Chiller Plant Room specifications in China, China Team uses High Performance Chiller Plant Room technology and adopts standard equipment to maintain standards. In order to achieve a cost-effective HVAC system for customers, accomplishing tasks within a high economic benefit range does not waste resources, allowing investors to enjoy the results of small investment and high returns. In response to the above vision, we set up a special department to provide customers with professional consulting services on High Performance Plant rooms.

After a large number of project investigations, we have summarized the causes of the general inefficiency of existing HVAC plant rooms on the market. To solve the current situation of general inefficiency, in addition to improving design concept and design method, the most important thing is that the consultant team need to involve in the implementation and later operation with full participation. In order to strengthen the technical capabilities in the middle and late stages of the project, when we set up a Expertised Team,in addition to focusing on rich design experience, we also specially recruited technical experts from equipment manufacturers, experienced field installation technicians, and even had secondary programming of plant operation automation system.Competent technical experts and developers of energy efficiency monitoring platforms. Expertised Team can provide customers with the following services:

1. A total solution on HVAC central plant room services;

2. System testing and commissioning services;

3. System Due Diligence and diagnosing Services;

4. M&E system diagnosis and energy audit services

The Value of aHigh Performance Chiller Plant Room

From a technical perspective, standard equipmentand standard working conditions avoid risks from new technologies and technically controllable, no spacial technique is required in system installation and maintainance in the later stage. Meanwhile, standard equipment could be easily purchased, all standard equipment manufactories may come to the bid, procurement risk is low and controllable, while avoiding non-standard equipment and non-standard working technique which substantially increase in the investment costs, the overall construction cost is controllable. Standard high performance plant room enhance the investment value and provides fruitful return to investor.

Aftera simple calculation, the value brought by the energy consumption of the HighPerformance Chiller Plant Room is very considerable:
Take a 60,000㎡ commercial complex development as an example. In region with hot summers and warm winters, the annual electricity saving is 2.35 million Kwh. In region with hot summers and cold winters, the annual electricity saving is 2.01million Kwh. Take a 40,000㎡ hotel as an example. In region with hot summers and warm winters, the annual electricity saving is 1.02 million Kwh. In region with hot summers and cold winters, the annual electricity saving is 850,000Kwh. According to the energy efficiency calculation of the refrigeration equipment room of domestic common projects, the cost can be recovered within 3years.

In order to achieve an efficient HVAC plant room, compared with the traditional design,procurement, and implementation processes, we need to participate in all aspects in a more comprehensive and in-depth manner. From the plan,construction drawing design, equipment procurement, engineering installation,commissioning, acceptance to the operation guarantee period after completion.The key points of the work at each stage are briefly described as follows:

1. Scheme design: determine energy efficiency goals, design thinking under full operating conditions,year-round load simulation, year-round energy efficiency simulation, equipment selection optimization, plant room design optimization, hydraulic calculation;

2. Construction drawing design: deepeningthe design of the plant room, BIM three-dimensional drawing,implementation of main equipment performance, technical details management and control;

3. Equipment recruitment: strict control of key technical requirements, equipment factory test;

4. Engineering installation: construction quality supervision, regular inspection, on-site problem optimization and rectification;

5. Testing and commissioning: pressure test and flushing of pipelines, equipment single machine testing and trail run,system linkage adjustment testing, efficient group control system debugging,secondary programming of automatic control system, optimized operation control strategy;

6. Operation and maintenance: energy efficiency monitoring system, energy efficiency target monitoring, energy efficiency target final test, automatic control secondary programming and sustainable optimization.

For existing buildings, we provide M&E system diagnosis and energy audit services:
The various M&E systems that have been put into operation on the market generally have low operating efficiency and high energy consumption, and the reason may befrom any causes. In order to solve this kind of problem, we need to thoroughly investigate, propose hypotheses, and verify various possibilities to summarize the causes, so as to provide improvement suggestions, improve energy efficiency, reduce operating costs, and increase revenue for the development.

All power-consuming equipment in building are within the scope of diagnosis.The direction of diagnosis includes system design, installation, maintenance,operation, user habits, operation mode, etc. The diagnosis process is as follows:

1. Understand architectural design concepts, functional areas of building and understand the user’s requirement;

2. Investigate the design of all M&E systems;

3. Investigate the M&E plant rooms and the energy consumption of the existing systems and equipment: including operating characteristics, time, service area, control status, operating records;

4. Grasp the M&E equipment facilities and energy consumption, and customize the on-site testing plan;

5. Collect and collate information on major energy consumption systems and equipment and on-site operation logs;

6. Test and evaluate the status of each M&E system, and conduct targeted on-site testing according to the plan;

7. Carry out indoor environment comfort testing: including temperature / humidity, carbon dioxide concentration, and sealing performance of enclosure;

8. Carry out energy consumption data and on-site testing and analysis: give main energy-saving directions and energy-saving suggestions and conduct feasibility analysis;

9. Provide practical and feasible energy-saving proposals;

Provide management recommendations for M&E equipment management specifications and daily maintenance;

Team Members: