Community Research and Development Information Service - CORDIS

Abstract

A microprocessor based data logging and control system for the detailed examination of heat pump performance is described and some preliminary results are discussed of its application to the complex problem of determining the influence of lubricating oil on system performance. Results are presented which illustrate the powerful data analysis software which has been developed, and the relationship between data collection and analysis is demonstrated. A systematic investigation of the influence of oil on heat pump performance is presented for a limited range of operating conditions, and conclusions are drawn about the impact that oil is having on the system and the measures the must be taken to counteract its deleterious effects. A theoretical analysis of the thermodynamic properties of pure refrigerants and refrigerant - oil mixtures is given and is applied in the analysis of the experimental data. Pressure - enthalpy charts are presented for pure refrigerant 12 and for a mixture of R12 with a typical oil.

Additional information

Authors: MCMULLAN J T, NEW UNIVERSITY OF ULSTER, COLERAINE, N. IRELAND (UK);HUGHERS D W, NEW UNIVERSITY OF ULSTER, COLERAINE, N. IRELAND (UK);MORGAN R NEW UNIVERSITY OF ULSTER, COLERAINE, N. IRELAND (UK), NEW UNIVERSITY OF ULSTER, COLERAINE, N. IRELAND (UK)
Bibliographic Reference: EUR 9445 EN (1984) MF, 200 P., BFR 360, BLOW-UP COPY BFR 1000, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123028600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en