The enthalpy difference laboratory is used to test the cooling and heating capacity of air conditioner. It measures the supply air parameters, return air parameters and circulating air volume of the air conditioner, and determines the capacity of the air conditioner by the product of the measured air volume and the difference between supply air and return air. The stewing laboratory is often used to provide the required working conditions, such as a certain temperature, a certain relative humidity and other environmental conditions, often used to measure the water flow, air volume, power consumption, cooling and heating capacity of air conditioning products. It is an important testing place for modern air conditioning testing equipment and design.

The enthalpy difference laboratory adopts a number of design techniques to achieve energy saving and reduce operating costs. According to the needs of users, the modular configuration can complete the wind-wind, wind-water, water-wind test projects, and become a multi-functional comprehensive laboratory, reducing project input costs and creating value for customers.

Air conditioning enthalpy difference Laboratory case:

Purpose:

In this laboratory, the air enthalpy difference method is used to measure the cooling capacity, heating capacity, low-temperature unsteady heating capacity, power consumption, C.O.P., circulating air volume and seasonal energy consumption efficiency of room air conditioners. It can be used as a testing device and an important means of design and development of room air conditioning.

1) The system and experimental methods are based on GB/T7725-96 "Room Air Conditioner", GB/T17758-1999 "Unit Air Conditioner"; 2) Basis for construction rules: national construction codes for HVAC, water supply and drainage projects.

Main equipment and engineering:

1) Laboratory room structure; 2) Condensing unit; 3) Air reprocessing equipment; 4) Humidifier heater; 5) Air volume test device; 6) Control cabinet; 7) Measuring instrument; 8) Refrigeration system pipeline engineering; 9) Water distribution system; 10 > Electrical wiring; 11) Cooling and water supply and drainage system; 12) Computer system;

Other equipment and engineering:

1) condensate water removal; 2) Laboratory lighting;

3) Standard machine (provided by Party A for calibration of the laboratory):

The laboratory consists of two rooms (indoor side and outdoor side), each room is equipped with a set of air handling units, used to control the air state in each room. In addition, the indoor side contains a set of air volume measurement device, which is used to measure the air volume and outlet of the measured machine. The air volume measurement device includes a plenum, a receiving chamber, a nozzle and a induced draft fan.

The measurement method is to install the air conditioner under test according to the actual way, by controlling the dry and wet bulb temperature of the indoor side and the outdoor side of the test unit, measure the temperature and humidity of the air inlet and outlet of the indoor unit and the air volume, so as to calculate the cooling and heating capacity.

The laboratory can be expanded into a tow three enthalpy difference laboratory (composed of four constant greenhouses), which can carry out a set of one tow three air conditioning test, and can also independently carry out two sets of one tow one air conditioning test at the same time.

Test items:

1) Rated refrigeration capacity test;

2) Rated heating capacity test;

3) Maximum operating refrigeration test;

4) Minimum operation refrigeration test;

5) Maximum operation heating test;

6) Minimum operation heating test;

7) Freezing test;

8) Condensation test;

9) condensate removal test;

10) Automatic defrosting test;