05438 Recovery and reuse of refrigerants

05438 Recovery and reuse of refrigerants

13 Space heating and cooling Optimization ot generator temperatures In the heat 96105434 operated absorption cycle using four types of aqueous salt so...

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13 Space heating and cooling Optimization ot generator temperatures In the heat 96105434 operated absorption cycle using four types of aqueous salt solutions Malik, 1. H. and Siddiqui, M. T. Energy Convers. Mgmf., Apr. 1996, 37, (4), 433-44s. Economic analyses of biogas, liquefied petroleum gas and solar collectors for optimizing generator temperatures in the absorption cycle, using aqueous solutions of LiBr, LiBr-ZnBr,, LiBr-ZnBr,-LiCl and LiBr-ZnCl,-CaBr, salts, have been carried out for a wide range of operating conditions. An ordinary collector, with two glass covers, and an evacuated-tubular collector have been selected as the sources of energy for providing hot liquid in the generator of the absorption cycle.

Program for calculating the steady state output of a 96lQ5435 floor heating system Didier, G. Chaud. Froid. Plomb., Jan. 1996, 50, (576), 85-86. (In French) Describes the computer program SELECT for calculating the steady state heat output of a floor heating system.

96105436 engineering

Progress of European standards tar environmental

Semlhermetic reciprocating compressor using propane in comparison with R22 and R404a

96105444

Renz, H. and Kammhoff, F. Ki Luft Kaltetech., Feb. 1996, 32, (2), 52-55. (In German) The paper describes calorimetric tests of a semihermetic compressor using R290 (propane) and compares the results with those for R22 and R404a for air conditioning, cooling and freezing ranges.

Sensitlvity analysis of energy performance of office buildings Lam, J. C. and Hui, S. C. Bldg. Environ., Jan. 1996, 31, (l), 27-39.

96105445

The authors examine the energy performance of office buildings in Hong Kong, and explains the basic principles of sensitivity methods for the study of building energy performance.

96105446

Simplified thermal response modelllng In building energy management. Paper III - Demonstration of a working controller

Coley, D. A. and Penman, J. M. Bldg. Environ., Mar. 1996, 31, (2), 93-97. Describes an optimum start controller utilising parameters extracted in real-time from measured data.

Chaud. Froid. Plomb., Feb. 1996, 50, (577), 75-79. (In French) A review

of European

standards

relating

to environmental

engineering.

96105447 Some unusual heating installations Andjulovici, A. Tech& ant Bau, Dec. 1995, (12). 75-79. (In German) The paper discusses infrared heating systems suitable for churches, beer halls and railways platforms.

Rebirth of the Barbican 96105437 Simmonds, R. Elec. Rev., Mar. 1996, 229, (5). 30-32. Describes the refurbishment of London’s Barbican Arts Centre. 96105438 Wells, P. L.

96105448 Stochastic modelling of building heating and cooling systems

Recovery and reuse of refrigerants Conf

1995, 9 pp.

To Examine Cost Effective Solutions, Inst. ReJrig.,

The paper sets out the accepted definitions for recovery, recycle and reclamation and the current and expected regulations on refrigerant recovery and waste handling and the impact on the refrigeration and air conditioning industry in the UK.

Reducing building energy costs using improved operation strategies for constant-volume air-handling systems

Hanby, V. I. 199-205. Reports that HVAC plant are used to investigation model based

and Dil, A. J.

Bldg. Serv. Engng. Res. Tech., 1995, 16, (4),

the computer simulations which can model the operation of in buildings generally have long execution times when they generate long-term measures of performance. Describes an which has established the feasibility of using a stochastic on Markov chains.

in ice skating

96105449

Liu, M. et al., ASHRAE Trans., 1995, 101, (2), 688-700. The authors maintain that building energy consumption can be substantially reduced after implementing improved operation strategies that are a scientific refinement of traditional operation and maintenance measures. This involves resetting the cooling deck or heating deck temperature to achieve maximum energy efficiency without compromising indoor air quality and comfort,

Yoon, D. W. et al., Ewiromnent In!., 1996, 22, (3), 309-314. Indoor nitrogen dioxide concentrations in 19 ice skating rins in the greater Boston area were monitored for one week each month, over a four-month period. Nitrogen dioxide was selected as an indicator of indoor air quality, and NO samplers were placed in two locations within each rink. Rinks ,i, er NO, levels (in excess of 200 nL!L), under normal operation, in with lug the first monitoring week were mitigated with changes in ventilation system operation in the subsequent months. After the first monitoring period, only two rinks had NO, levels above 200 nL/L. It was suspected that high levels in these two rinks may have been related to improper ventilation. High NO, concentrations were found in the ice skaing rinks with ropanepowered ice resurfacers, other studies indicate that combustion Puels can also result in elevated indoor concentrations.

96lQ5440

Refrigeration military technology

In the German army - Application

to

Blackert, H. Ki LuJt Kaltetech., Feb. 1996, 2, (2), 69-71. (In German) Reports that the applications of refrigeration in the Germany army correspond to a large extent to civil applications. The differences are in the requirements for global application, immediate availability, imperviousness to different outdoor conditions and availability even under nuclear, biological and chemical protection conditions.

96105441

Repowering of the Kelenfold district heating plant

Holler, F. et al., MP.S, Modern Power Systems, Jun. 1996, 16, (6), 47,49,51,53,55-56. Reports on the completion of the Budapest’s Kelenfold district heating power plant, one of the first gas turbine based repowering projects in the former Eastern Europe. The project illustrates the country’s growing acceptance of efficient gas turbine based power systems. The new combined-cycle power plant is expected to significantly improve the power and district heat supply in Budapest, allowing more efficient energy utilization while reducing environmental pollution.

96105442

Residential mechanical ventilation - Getting it right

Proc. VI Thermal Performawe of the Exterior Ettvelopes of Buildings Conf., Florida, 1995, ASHRAE, 1995, 171-175. The paper discusses the problems which can arise with residential mechanMarshall,

R.

ical ventilation

from

a Canadian

experience.

Roll waves in falling films: An approximate 96105443 ment ot the velocity field

treat.

Patnaik. V. and Perez-Blanco. H. Int. J. Heat & Fluid F[ow. Feb. 1996. 17, (1);63-70. Wavy flows, an important aspect of falling film absorption in refrigeration systems, are difficult to describe analytically because of their transitional regime. Within the wavy-laminar flow regime, high-frequency capillary waves are known to exist below a Reynolds (Re) number of 200. Above the critical Re, inertial waves driven by gravity, known as roll waves, can exist. These low-frequency waves, observed in an experimental absorber, were identified via image-processing studies of the falling film.

Surveillance

of indoor air quality

96105439

rinks

96105450

Technical products

Bldg. Serv. CIBSEJ., Lists building

96105451 ventilation Stahl. M.

Mar. 1996, 18, (3), 51-53. service equipment newly available on the market in the UK.

Theme - Active building

envelopes

for natural

CIinra Comm. Int., Feb. 1996. 30, (2). 21-27. (In German) A summary of papers given at a Sympo&um in FrankfuriiMain, 9 rjovember 1995, on the topic of active building envlopes, and their ability to ensure natural ventilation of office buildings in inner city areas subjected to air pollution. Describes the design of four case studies of buildings in Germany with active envelopes.

Thermal performance of an evaporatively cooled building: Parametric studies Maiya, M. P. Int. J. Energy Research, Jun. 1996, 20, (6), 465-481. 96105452

A single-story office building in a hot and dry climate is modelled for evaporative cooling. The counterflow cooling tower is modified to precool the tower inlet air by the tobver exit air in a heat exchanger. Centralized evaporative air cooling, using the modified cooling tower, and roof evaporative cooling are considered to provide comfortable living conditions in the space. The thermal performance of such a building is analysed for various operating parameters. The study indicates that centralized evaporative air cooling is feasible, to maintain near-perfect comfort conditions in hot and dry climates. Modified cooling tower and roof evaporative cooling further enhance the scope of evaporative cooling for comfort applications. 96105453

Towards

a simplitied

non-residential

building

energy code

Baird, G. et al., AIRAHJ., Feb. 1996, 50, (2), 22-29. Discusses the revision of building codes and energy standards taking place in New Zealand. Efforts are being made to produce a performance-based energy code for non-residential buildings.

Fuel and Energy Abstracts

September 1996 379