服务热线

18500300266
网站导航
Refrigeration
当前位置: 首页 > Products > Refrigeration

R515 Mechanical Heat Pump

产品时间:2022-03-04 10:35:02

简要描述:

● Stabilises in minutes allowing many tests to be conducted in atypical laboratory period. ● Allows a complete refrigerant pressure-enthalpy cyclediagram to be drawn at all operating conditions. ● Ope

详细介绍

● Stabilises in minutes allowing many tests to be conducted in a typical laboratory period. 

● Allows a complete refrigerant pressure-enthalpy cycle diagram to be drawn at all operating conditions. 

● Operates on CFC free R134a refrigerant 

● Allows a complete energy balance to be performed between electrical input and thermal input/output.  

● Allows generation of heat pump performance curves over arrange of conditions. 

● Optional Data Acquisition Upgrade. 

● Two year warranty

Introduction 

The R515 Hilton Mechanical Heat Pump has been designed to provide students with a practical and quantitative demonstration of the vapour compression cycle, and is suitable for all course levels, from vocational to undergraduate. 

Both refrigerators and heat pumps use the vapour compression cycle, and although the applications of these machines differ the components are essentially the same. 

The unit described here demonstrates the heat pump application where a large freely available energy source, such as atmosphere, is to be upgraded for water heating. 

As a bench top unit designed for student use, the unit will be of particular interest to those studying: 

 Mechanical Engineering 

 Agricultural Engineering 

 Energy Conservation 

 Thermodynamics 

 Building Services 

 Chemical Engineering 

 Marine Engineering 

 Plant & Process Engineering 

 Refrigeration and Air Conditioning 

 Food Technology

Experimental Capabilities 

● Determination of power input, heat output and coefficient of performance. 

● Production of heat pump performance curves over a range of source and delivery temperatures. 

● Plotting the vapour compression cycle on a p-h diagram and comparing this with the ideal cycle. 

● Determination of energy balances for condenser and compressor. 

● Production of heat pump performance curves based on R134a properties, at a variety of evaporating and condensing temperatures. 

● Estimation of the effects of compressor pressure ratio on volumetric efficiency.

Description 

The components of the heat pump and its instrumentation are mounted on a gloss finish high quality ABS plastic panel.

The heat pump consists of a hermetic compressor, an efficient plate heat exchanger condenser, a liquid receiver, a thermostatically controlled expansion valve and air heated evaporator. 

The components are clearly but compactly arranged in a manner similar to that used for many domestic air-water heat pumps and all are visible from the front of the unit. 

The operating cycle is as follows: 

Slightly superheated Refrigerant R134a vapour enters the compressor from the evaporator and its pressure is increased. This brings about a rise in temperature and the hot vapour enters the water cooled condenser. Heat is given up to the cooling water and the refrigerant condenses to a liquid before passing to the liquid receiver and then the expansion valve.

On passing through the expansion valve the pressure of the liquid refrigerant is reduced, causing the saturation temperature to fall to below that of the atmosphere. Thus, as it flows through the evaporator, there is a temperature difference between the refrigerant and the air being drawn across the fins. The resulting heat transfer causes the refrigerant to boil, and on leaving the evaporator it has become slightly superheated vapour, ready to return to the compressor. The degree of superheat is automatically controlled by the expansion valve, which may be adjusted. 

The temperature at which heat is delivered in the condenser is controlled by the water flow rate and its inlet temperature. Water may be delivered at up to 50ºC. 

The evaporating temperature is largely determined by the ambient conditions of temperature and humidity. However, a limited variation is possible, either by restricting the air intake to the evaporator, or by directing warmed air towards the intake. (The air inlet temperature should not be allowed to exceed 35ºC to avoid overloading the compressor.) 

Variable area flowmeters on both the refrigerant and cooling water circuits, an electrical energy meter recording power input to the compressor and a digital electronic thermometer recording all relevant temperatures, allow an interesting and comprehensive range of experiments to be conducted.

Specification 

General 

A fully instrumented bench top air to water heat pump operating on the mechanical vapour compression cycle with refrigerant R134a as the working fluid. 

Detailed 

Refrigerant: R134a (HFC134a) 

Panel: High quality ABS plastic panel on which the following components are mounted. 

Compressor: Fully hermetic single cylinder reciprocating type. Displacement 8.85 cm3 rev-1 

Condenser: Refrigerant to water. Efficient plate type heat exchanger. 

Liquid Receiver: With valves. Contains entire refrigerant charge if required. 

Evaporator: Air to refrigerant. Serpentine copper tube with aluminium fins and with integral fan. 

Digital Thermometer: Resolution 0.1ºC, with switch to select from six thermocouples. 

Flow Meters (2): Variable area type – to indicate R134a and H2O flow rates. 

Pressure Gauges (2): To indicate R134a pressures in evaporator and condenser. 

Electrical Energy Meter: Watt-hour type recording electrical input to the compressor. (Digital Wattmeter available as optional extra R515A). 

Safety Features: Condenser high pressure switch and compressor thermal overload switch. Residual current circuit breaker and a combined double pole main switch and overload cut out. All electrical components connected to common earth conductor. 

Optional Data Acquisition Upgrade 

An optional Computerised Data Acquisition Upgrade RC516A is available to enable all relevant system parameters to be automatically recorded on a PC for further analysis and display. Data may also be transferred to spread sheet format for complex analysis and calculation.

 


产品咨询

留言框

  • 产品名称:

  • 留言内容:

  • 您的单位:

  • 您的姓名:

  • 联系电话:

  • 常用邮箱:

  • 详细地址:

推荐产品

Copyright © 2012-2020 北京青铄鑫业科技有限公司 版权所有  京ICP备 13039369号

地址:北京市昌平区黄平路19号院4号10层 电话:18500300266 邮箱:sale@tsingso.com

关注我们