Experimental data for an air-conditioning system identification.

In this article, data from a 3.5kW mini split air conditioning is presented. A screening 23 design experiment was performed to evaluate the effects of indoor air temperature, absolute humidity and evaporator fan speed in the performance of the air conditioning. This dataset also includes noise factors as outdoor air temperature, fans energy consumption and response as indoor air exit conditions.

Thermal Optimization of a Dual Pressure Goswami Cycle for Low Grade Thermal Sources.

This paper presents a theoretical investigation of a new configuration of the combined power and cooling cycle known as the Goswami cycle. The new configuration consists of two turbines operating at two different working pressures with a low-heat source temperature, below 150 °C. A comprehensive analysis was conducted to determine the effect of key operation parameters such as ammonia mass fraction at the absorber outlet and boiler-rectifier, on the power output, cooling capacity, effective first efficiency, and effective exergy efficiency, while the performance of the dual-pressure configuration was compared with the original single pressure cycle. In addition, a Pareto optimization with a genetic algorithm was conducted to obtain the best power and cooling output combinations to maximize effective first law efficiency. Results showed that the new dual-pressure configuration generated more power than the single pressure cycle, by producing up to 327.8 kW, while the single pressure cycle produced up to 110.8 kW at a 150 °C boiler temperature. However, the results also showed that it reduced the cooling output as there was less mass flow rate in the refrigeration unit. Optimization results showed that optimum effective first law efficiency ranged between 9.1% and 13.7%. The maximum effective first law efficiency at the lowest net power (32 kW) and cooling (0.38 kW) outputs was also shown. On the other hand, it presented 13.6% effective first law efficiency when the net power output was 100 kW and the cooling capacity was 0.38 kW.

Progresión de plasmocitoma óseo a mieloma múltiple y reporte de un caso / Progression of plasmacytoma of bone to multiple mieloma and a case report

El plasmocitoma óseo solitario y el mieloma múltiple son dos gammapatías monoclonales que pertenecen al mismo grupo de alteraciones neoplásicas de células plasmáticas. En ocasiones el plasmocitoma precede al mieloma. La localización esternal de un plasmocitoma es excepcional. Se reporta el caso de una persona de sexo masculino de 75 años, con dolor moderado en la región dorsal acompañado de disnea de medianos esfuerzos. La tomografía reveló lesiones osteolíticas localizadas en el tercio inferior del esternón, con características radiológicas de un plasmocitoma óseo solitario, además se observan lesiones en la 5ta. costilla izquierda y escápulas. La biopsia de médula ósea evidenció una plasmocitosis medular del 45 % y la inmunoelectroforesis, una concentración de 4210 mg/dl de Inmunoglobulina G. Se hace el diagnóstico de mieloma múltiple y se analizan las alteraciones que lo hicieron evolucionar hasta ese punto con el fin de tener presente la posibilidad de la evolución a mieloma múltiple en aquellos pacientes con plasmocitoma óseo. Se expone el siguiente caso con el objetivo de mejorar la calidad de vida de los pacientes a través del diagnóstico oportuno del plasmocitoma óseo, logrando así evitar la evolución a mieloma múltiple, y resultar en una mayor supervivencia.

Solitary plasmacytoma of bone and multiple myeloma are two monoclonal gammapathies that belong to the same group of neoplastic alterations of plasma cells. The plasmacytoma occasionally precedes myeloma. The sternal location of plasmocytoma is rare. This is the case of a man aged 75 years, with moderate pain in the dorsal region and short of breath when making medium efforts. The axial tomography showed osteolytic lesions in the lower third of sternum with radiological characteristics of a solitary plasmocytoma of bone in addition to lesions in the 5th left rib and scapulas. The bone marrow biopsy revealed 45% medullary plasmocytosis whereas immunoelectrophoresis showed Ig G concentration of 4210 mg/dl. Multiple myeloma was diagnosed and an analysis was made on the alterations leading to this result, with the purpose of bearing in mind the possibility of progression to a multiple myeloma in those patients with plasmocytoma of bone. The following case was presented in order to improve the quality of life of patients through timely diagnosis of plasmocytoma of bone and to avoid progression to multiple myeloma, thus achieving higher survival rates.